Consulta: subjectFacets:"Germination"
Registros recuperados: 370
Data/hora: 04/06/2024 13:30:20

PLANT PHYSIOLOGICAL PERFORMANCE AND SEED CHEMICAL COMPOSITION OF SOYBEAN UNDER DIFFERENT SPATIAL ARRANGEMENT
Provedor de dados: 196
Autores: Nobre, Danubia Aparecida Costa; Silva, Rodrigo Rocha; Guimarães Nasser, Vinicius; Silva, Geraldo Humberto; Aquino, Leonardo Angelo; Macedo, Willian.
Poucos estudos apresentam interações entre a fisiologia das plantas e sua posterior composição química, quando cultivadas em diferentes arranjos. Esta pesquisa buscou compreender a relação entre o espaço de cultivo da soja e sua influência sobre a qualidade da semente. Foram estudadas duas cultivares de soja (Tec 7849 Ipro e Monsoy 6972 Ipro) em quatro arranjos espaciais distintos (50,0 x 7,1; 40,0 x 8,9; 30,0 x 11,9 e 18,9 x 18,9 ou 16,2 x 16,2 cm, respectivamente). Durante os estádios fenológicos V4 e R2, foram analisadas trocas gasosas e na colheita, foram constituídos 2 grupos, um de sementes frescas e outro de sementes envelhecidas, para ambos os grupos se analisaram: teste de germinação, vigor, índice de velocidade de germinação, massa fresca das...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gas exchange; Germination; Lipids; Gas chromatography; Trocas gasosas; Germinação; Lipídeos; Cromatografia gasosa.
Ano: 2023
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6850

EFFECT OF THE PEEL EXTRACTS FROM TWO CAMPOMANESIA (MYRTACEAE) SPECIES ON ALLIUM CEPA L. (AMARYLLIDACEAE)
Provedor de dados: 196
Autores: Silva, Bruno Araújo; Castro, Thiago Luis Aguayo de; Viana, Lucilene Finoto; Mascarenhas Santos, Maria do Socorro; Cardoso, Claudia Andrea Lima.
Species from the genus Campomanesia have been studied due to their biological activity and low toxicity. However, studies on the fruit peel of these species are scarce. In this context, the effects of ethanol extract from the fruit peel of Campomanesia sessiliflora (O. Berg) Mattos (CS) and Campomanesia guazumifolia (Cambess) O. Berg (CG) were evaluated concerning the effect on germination and meristem cells of roots of Allium cepa. The CG ethanolic extract showed flavonoid compounds higher than CS ethanolic extract. The CS extract showed no antioxidant activity. CS showed greater antiproliferative activity with reduced root size in A. cepa seeds. The two extracts did not induce mutagenicity and cell death at the studied concentration of 1 mg mL-1....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Allelopathy; Ethanolic extract.
Ano: 2022
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6831

RESPONSES OF COWPEA CULTIVARS TO SALINE STRESS
Provedor de dados: 196
Autores: Romanoski, Vanessa; de Moura Souza Filho, Paulo Roberto; Badaró Pimentel, Adérico Júnior.
The cowpea [Vigna unguiculata (L.) Walp] is widely cultivated in Northeast Brazil and stands out for its economic and social importance. Part of the cultivation area is affected by salt stress, which affects the performance of the crop. The effects of salinity can be mitigated with the development of tolerant cultivars. The objective of this work was to evaluate the behavior of cowpea cultivars under different levels of saline stress in the germination and emergence phases of the crop. Two trials evaluating the germination and emergence phases were conducted, under controlled conditions, in a factorial scheme with 11 cultivars and five solution of NaCl with concentrations ranging from 0 to 120 mM. There was a marked difference in the response of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Melhoramento genético; Estresse abiótico; Germinação; Emergência; Vigna unguiculata; Genetic improvement; Abiotic stress; Germination; Emergency.
Ano: 2023
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/7230

Calidad física y fisiológica en semillas de híbridos de maíz de los valles altos centrales de México y su relación con el establecimiento en campo.
Provedor de dados: 32
Autores: Bustamante Zepeda, Jimena E.
La calidad de las semillas es un elemento de suma importancia para los productores, por tal motivo las pruebas de calidad física y fisiológica son primordiales para estimar eficacia. En el presente estudio se efectuaron dichas pruebas en semillas de 18 híbridos comerciales de maíz de los Valles Altos Centrales de México. Se utilizaron el laboratorio y almaciguero del programa de semillas del Colegio de Postgraduados, además de cuatro localidades del Estado de México. En laboratorio se midieron las variables: porcentaje de germinación al primer conteo, contenido de humedad, peso volumétrico, análisis de pureza, condición del pedicelo, peso de mil semillas y se reclasificó a la semilla en seis tamaños. En almaciguero se sembró semilla en dos condiciones...
Palavras-chave: Calidad; Emergencia; Establecimiento; Germinación; Vigor; Quality; Emergence; Establishment; Germination; Vigor; Maestría; Producción de semillas.
Ano: 2010
URL: http://hdl.handle.net/10521/215

Caracterización morfológica de fruto y semilla de nanche Byrsonima crassifolia (L.) Kunth y su relación con la capacidad germinativa
Provedor de dados: 32
Autores: Jaimes Albíter, Camelia.
En la presente investigación, se buscó demostrar que la morfología de fruto y  semilla  de nanche, está relacionada con el comportamiento germinativo de la  especie, así como identificar el tipo de latencia que presenta y evaluar el efecto de  diversos tratamientos pre-germinativos, para facilitar la germinación de las semillas;  para ello, se evaluaron caracteres morfológicos cuantitativos y cualitativos de  planta, hoja, fruto y semilla y se realizaron dos  pruebas de germinación estándar,  una con semillas extraídas de los endocarpios y la otra con los endocarpios  conteniendo a las semillas. La caracterización morfológica  evidenció que  el  nanche es una especie ampliamente variable, y que los endocarpios de los  ecotipos evaluados presentan dureza,...
Tipo: Tesis
Palavras-chave: Caracterización morfológica; Escarificación; Germinación; Latencia; Tratamientos pre-germinativos; Morphologic characterization; Scarification; Germination; Dormancy; Pre-germinative treatments.
Ano: 2009
URL: http://hdl.handle.net/10521/1180

Capacidad germinativa de semillas de Taxus globosa Schltdl.
Provedor de dados: 32
Autores: Ramírez Sánchez, Susana Elizabeth.
Taxus globosa Schtdlt. es una especie de importancia no solo por encontrarse en la NOM-059-ECOL-2010, sino, también por que produce un metabolito llamado taxol que es utilizado comercialmente para contrarrestar el cáncer. Actualmente, su obtención de esta especie es complicada, pues por encontrarse dentro de la norma, está prohibida su extracción; además su distribución en México es discontinua y su semilla presenta latencia, condición que dificulta mucho la propagación por medio de semilla; la germinación es escalonada y baja (2 al 14%). Es la única especie de este género en México y se considera endémica de nuestro país y de América central. Por lo que, en la presente investigación se buscó evaluar las diferencias morfológicas en las semillas de dos...
Palavras-chave: Taxus globosa; Germinación; Tratamientos pre-germinativos; Incubación; Estratificación; Germination; Pre-germination treatments; Incubation; Stratification; Producción de Semillas; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/1089

Efecto de la aplicación de vermicomposta en la mitigación del estrés hídrico en plantas tipo C3 y C4.
Provedor de dados: 32
Autores: Aguilar Benítez, Gisela.
Se ha evidenciado que la vermicomposta puede mejorar la germinación y el crecimiento y productividad de las plantas; sin embargo, su efecto combinado con déficit de humedad ha sido escasamente documentado. El objetivo de esta investigación fue evaluar el efecto de la vermicomposta en la germinación, crecimiento inicial y rendimiento en plantas C3 y C4, con déficit de humedad en el suelo. En laboratorio se evaluó la germinación de dos cultivares de frijol y dos de maíz, con respuesta contrastante a sequía, en suelo sin y con 1.5, 3, 6 y 9 % de vermicomposta, y con potenciales de agua (ΨA) de -0.03 y -2 MPa; en invernadero se cuantificó el intercambio de gases y crecimiento de maíz, así como algunos componentes del rendimiento de frijol, en suelo sin y con...
Palavras-chave: Estrés; Floración; Semilla; Germinación; Uso eficiente del agua; Stress; Flowering; Seeds; Germination; Water use efficiency; Doctorado; Botánica.
Ano: 2011
URL: http://hdl.handle.net/10521/452

Germinación en semilla de chile piquín (Capsicum annuum var. aviculare).
Provedor de dados: 32
Autores: Cano Vázquez, Anaid.
El chile piquín es una planta silvestre que presenta ciertos mecanismos para asegurar la perpetuación de la especie. Dentro de estos mecanismos se encuentra la latencia de sus semillas. La germinación de las semillas de chile piquín presenta problemas para siembras  intensivas comerciales. En este trabajo se planteó: 1) comparar diversas colectas en cuanto a su capacidad germinativa; 2) indagar si la baja germinación se debe a impermeabilidad en la semilla o a alguna característica estructural de la semilla; 3) encontrar un tratamiento de preacondicionamiento que mejore la germinación de la semilla y 4) probar la germinación in vitro como un método alternativo para obtener plántula en un corto tiempo. Para prevenir la interferencia de microorganismos...
Palavras-chave: Germinación; Impermeabilidad; Latencia; Desinfección; Germination; Permeability; Dormancy; Disinfection; Fisiología Vegetal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2114

Producción de plántulas de pimiento morrón (Capsicum annuum L.) en sustratos derivados de residuos agrícolas.
Provedor de dados: 32
Autores: Pérez López, Hermelindo.
Con el propósito de encontrar alternativas y tratar de reducir el impacto ambiental que ocasiona el uso de la turba y otros materiales convencionales, se evaluaron subproductos orgánicos agroindustriales (bagazo de la caña de azúcar, cachaza y cascarilla de café) en combinación con material inorgánicos (tezontle). El objetivo fue caracterizar las propiedades físicas y químicas de mezclas de sustratos basados  en residuos agrícolas y evaluar su uso en la producción de plántulas de cinco variedades de pimiento morrón. Los sustratos fueron: 1) TZBZ: tezontle + bagazo de la caña; 2) TZCC: tezontle + cascarilla de café; 3) TZCZ: tezontle + cachaza; y  4) TZ: tezontle; formuladas en una proporción 40/60 (v/v). Como variable de respuesta se contabilizó porcentaje...
Palavras-chave: Sustrato lignocelulósicos; Cachaza; Bagazo; Cascarilla de café; Germinación; Nutrición vegetal; Lignocelulosic substrates; Cachasse; Bagasse; Caffee husk; Solanaceae; Germination; Plant nutrition; Fisiología Vegetal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2177

Caracterización morfológica de fruto y semilla de nanche Byrsonima crassifolia (L.) Kunth y su relación con la capacidad germinativa
Provedor de dados: 32
Autores: Jaimes Albíter, Camelia.
En la presente investigación, se buscó demostrar que la morfología de fruto y  semilla  de nanche, está relacionada con el comportamiento germinativo de la  especie, así como identificar el tipo de latencia que presenta y evaluar el efecto de  diversos tratamientos pre-germinativos, para facilitar la germinación de las semillas;  para ello, se evaluaron caracteres morfológicos cuantitativos y cualitativos de  planta, hoja, fruto y semilla y se realizaron dos  pruebas de germinación estándar,  una con semillas extraídas de los endocarpios y la otra con los endocarpios  conteniendo a las semillas. La caracterización morfológica  evidenció que  el  nanche es una especie ampliamente variable, y que los endocarpios de los  ecotipos evaluados presentan dureza,...
Palavras-chave: Caracterización morfológica; Escarificación; Germinación; Latencia; Tratamientos pre-germinativos morphologic characterization; Scarification; Germination; Dormancy; Pre-germinative treatments.
Ano: 2012
URL: http://hdl.handle.net/10521/796

Anatomía y tolerancia a la desecación de semillas de cacao (Theobroma cacao L.)
Provedor de dados: 32
Autores: Rangel Fajardo, María Alma.
La adquisición de tolerancia a la desecación en semillas ortodoxas es una estrategia adaptativa  que no presentan las semillas del tipo recalcitrantes y por consiguiente son sensibles a la  desecación. El grado de tolerancia o sensibilidad a la desecación se ve afectada por varios  aspectos de origen genético, fisiológico, bioquímico y anatómico; por consiguiente existen  diferencias entre genotipos y entre individuos dentro del genotipo de la misma especie. En este  estudio se documentaron características de anatomía de las semillas de cacao, se midió el grado  de tolerancia a la desecación y la acumulación de azúcares en relación con tolerancia a la  desecación en poblaciones de tres orígenes genéticos de cacao (Theobroma cacao L.). Se  emplearon los...
Tipo: Tesis
Palavras-chave: Theobroma cacao L.; Anatomía; Desecación; Estaquiosa; Germinación; Rafinosa; Semilla; Sensibilidad; Doctorado; Producción de semillas; Anatomy; Drying; Germination; Raffinose; Seed sensitivity; Stachyose.
Ano: 2009
URL: http://hdl.handle.net/10521/1246

Análisis del crecimiento y calidad de semillas de tres tipos de chile (Capsicum annuum L.).
Provedor de dados: 32
Autores: Ayala Villegas, Misael Jorge.
El chile es una de las hortalizas más importante a nivel mundial. México es de los países con mayor producción y al ser centro de origen y domesticación de la especie Capsicum annuum L. tiene una amplia diversidad de materiales agrupados en tipos. Los estudios referentes al crecimiento y desarrollo de la planta y semilla de chile, son escasos y no son recientes. Aquí, se comparó el crecimiento de la planta de los tipos de árbol, ancho y guajillo y se evaluó la calidad de semillas durante su desarrollo. Se utilizaron semillas provenientes del Programa de Conservación de Germoplasma de Chile del Colegio de Postgraduados. Las plantas crecieron bajo condiciones de invernadero en Texcoco, Edo, de México entre el 25 de marzo y el 12 de noviembre de 2010. El...
Palavras-chave: Capsicum annuum; Análisis de crecimiento; Etapa de desarrollo; Etapa de extracción; Germinación; Growth analysis; Development stage; Extraction stage; Germination; Maestría; Fisiología Vegetal.
Ano: 2012
URL: http://hdl.handle.net/10521/722

Determinación bioquímica de la actividad enzimática de aminopeptidasa (tcAPE) y amplificación de fragmentos de ADNc de posibles genes TcAPE de Theobroma cacao L
Provedor de dados: 32
Autores: Aguilar Román, Lorena.
En el presente trabajo, se propuso realizar una determinación bioquímica de la actividad enzimática de aminopeptidasa (tcAPE) durante los procesos de germinación y fermentación de la semilla de T. cacao L., así como amplificar los extremos 3’ de fragmentos de cDNA de los posibles genes codificantes. El trabajo inició con la determinación de la actividad enzimática de tcAPE. Los resultados indicaron que la actividad enzimática de tcAPE, está presente durante el proceso de germinación de la semilla de T. cacao L., sin embargo, la síntesis de esta enzima se eleva durante la fase de crecimiento, misma que corresponde a la última etapa del proceso de germinación de la semilla de cacao criollo del genotipo almendra blanca. La actividad de tcAPE también se...
Tipo: Tesis
Palavras-chave: Theobroma cacao L.; Aminopeptidasa; Proteasas; Germinación; Fermentación; Maestría; Producción Agroalimentaria en el Trópico; Aminopeptidase; Proteases; Germination; Fermentation.
Ano: 2008
URL: http://hdl.handle.net/10521/1575

Calidad física y fisiológica en semillas de híbridos de maíz de los valles altos centrales de México y su relación con el establecimiento en campo.
Provedor de dados: 32
Autores: Bustamante Zepeda, Jimena E.
La calidad de las semillas es un elemento de suma importancia para los productores, por tal motivo las pruebas de calidad física y fisiológica son primordiales para estimar eficacia. En el presente estudio se efectuaron dichas pruebas en semillas de 18 híbridos comerciales de maíz de los Valles Altos Centrales de México. Se utilizaron el laboratorio y almaciguero del programa de semillas del Colegio de Postgraduados, además de cuatro localidades del Estado de México. En laboratorio se midieron las variables: porcentaje de germinación al primer conteo, contenido de humedad, peso volumétrico, análisis de pureza, condición del pedicelo, peso de mil semillas y se reclasificó a la semilla en seis tamaños. En almaciguero se sembró semilla en dos condiciones...
Palavras-chave: Calidad; Emergencia; Establecimiento; Germinación; Vigor; Quality; Emergence; Establishment; Germination; Vigor; Maestría; Producción de semillas.
Ano: 2010
URL: http://hdl.handle.net/10521/215

Germinación y propagación de Tillandsia macdougallii L. B Sm. y Tillandsia violacea Baker (Bromeliaceae) con fines de aprovechamiento sustentable.
Provedor de dados: 32
Autores: Vázquez Hurtado, Nora Berenice.
Los procesos sustentables son adoptados con mayor frecuencia por comunidades rurales de México. La conveniencia de conservar y aprovechar de una forma sostenible los recursos naturales, especialmente las bromelias (con potencial ornamental), pueden generar opciones y beneficios para las familias. Como una opción para evitar el saqueo, así como contribuir al manejo y protección, de las bromelias .En esta investigación se plantearon los siguientes objetivo:1) se evaluó el porcentaje de germinación y viabilidad en las semillas de Tillandsia macdougallii y Tillandsia violacea, 2) se probó el efecto de los tratamientos pregerminativos, AG₃ y NKO₃ en la germinación y desarrollo de plántulas, 3) se estudiaron los efectos de diferentes sustratos para el...
Palavras-chave: Germinación; Viabilidad; Sustratos; Micropropagación; Sobrevivencia; Germination; Viability; Substrates; Micropropagation; Survival; Botánica; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2298

Caracterización de seis genotipo de amaranto (Amaranthus hypochondriacus L.) mediante los patrones de germinación de la semilla expuesta a herbicidas, ácido salicílico y compuestos análogos, sulfato de cobre y carencia de hierro
Provedor de dados: 32
Autores: Barrales Cureño, Hebert Jair.
En México, existen algunas variedades seleccionadas de amaranto (A.  hypochondriacus) para las zonas templadas como la Línea 1, Mercado, Nepal, Azteca y Mexicano, así como algunas razas criollas como la Tulyehualco y la Mixteca, que por sus características agronómicas y potencial de rendimiento son de las más importantes. El aprovechamiento del amaranto es integral por utilizarse el grano y la planta como verdura y forraje. Las variedades de amaranto Línea 1, Mercado, Nepal, Tulyehualco, Criolla Tulyehualco y Criolla Mixteca fueron caracterizadas para diferenciar a cada una de estas variedades de las demás de acuerdo a características físicas: peso de 100 semillas y patrón de imbibición; así como características fisiológicas de la semilla: cinética y...
Tipo: Tesis
Palavras-chave: Calidad de semilla; Germinación; T50; Vigor; Sideróforos; Quality of seed; Germination; T50; Force; Siderophores.
Ano: 2008
URL: http://hdl.handle.net/10521/1178

Germinación de Diferentes cultivos en condiciones de salinidad cuantitativa y cualitativa
Provedor de dados: 32
Autores: González Romero, Sara Lucia.
El presente estudio se llevó a cabo en dos fases. La primera fue con el propósito de  evaluar, en la etapa de germinación de algunos cultivos, la tolerancia a la salinidad en  siete niveles de conductividad eléctrica (CE) constante para cada sal. En la segunda  fase se evaluó la tolerancia del pasto Banderita a temperatura contante y en soluciones  isosmóticas. Los resultados obtenidos en la primera fase mostraron que las sales con  predominio de Cl- generaron una CE mayor, y un potencial osmótico (Ψπ) menor, en  comparación a sales con superioridad de SO42- y HCO3-. Las sales que registraron Ψπ  menor tuvieron pH ligeramente ácido y las de potencial mayor el pH fue neutro.  Estadísticamente, las sales que tuvieron el ión HCO3- como anión acompañante,...
Tipo: Tesis
Palavras-chave: Salinidad cualitativa y cuantitativa; Germinación; Temperatura y pasto Banderita; Pasto Banderita; Doctorado; HIdrociencias; Qualitative and quantitative salinity; Germination; Temperature and sideoats grama; Sideoats grama.
Ano: 2009
URL: http://hdl.handle.net/10521/1290

Caracterización morfológica de fruto y semilla de nanche Byrsonima crassifolia (L.) Kunth y su relación con la capacidad germinativa
Provedor de dados: 32
Autores: Jaimes Albíter, Camelia.
En la presente investigación, se buscó demostrar que la morfología de fruto y  semilla  de nanche, está relacionada con el comportamiento germinativo de la  especie, así como identificar el tipo de latencia que presenta y evaluar el efecto de  diversos tratamientos pre-germinativos, para facilitar la germinación de las semillas;  para ello, se evaluaron caracteres morfológicos cuantitativos y cualitativos de  planta, hoja, fruto y semilla y se realizaron dos  pruebas de germinación estándar,  una con semillas extraídas de los endocarpios y la otra con los endocarpios  conteniendo a las semillas. La caracterización morfológica  evidenció que  el  nanche es una especie ampliamente variable, y que los endocarpios de los  ecotipos evaluados presentan dureza,...
Palavras-chave: Caracterización morfológica; Escarificación; Germinación; Latencia; Tratamientos pre-germinativos morphologic characterization; Scarification; Germination; Dormancy; Pre-germinative treatments.
Ano: 2012
URL: http://hdl.handle.net/10521/854

Temperaturas cardinales de germinación en cuatro variedades de tomate de cáscara (Physalis philadelphica Lam.).
Provedor de dados: 32
Autores: Calzada López, Sandra Guadalupe.
Physalis philadelphica Lam. (tomate de cáscara) es una hortaliza de importancia económica y cultural en México, su fruto se utiliza principalmente con fines alimenticios. Ocupa el cuarto lugar entre las hortalizas cultivadas en México. Las temperaturas para la germinación de semillas, generalmente se consideran en relación a su respuesta: mínima, óptima y máxima; también llamadas temperaturas cardinales de germinación. La temperatura mínima y máxima son aquellas en las cuales se obtiene el menor porcentaje de germinación, la óptima es aquella en la que se obtiene la mayor tasa de germinación en el menor tiempo. Las temperaturas cardinales son variables entre especies y aún entre variedades de una misma especie. El objetivo del presente estudio fue...
Palavras-chave: Physalis philadelphica Lam.; Germinación; Temperaturas cardinales; Germination; Cardinal temperatures; Botánica; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1990

Distribución ecológica del subgénero Neodawsonia Backeb. del género Cephalocereus Pfeiff. (Cactaceae), en el Itsmo de Tehuantepec, México.
Provedor de dados: 32
Autores: Bárcenas Argüello, María Luisa.
Cephalocereus es un género monofilético, cuya distribución es alopátrica y está restringida a la Barranca de Metztitlán (C. senilis), al Valle de Tehuacán-Cuicatlán (C. columna-trajani) y a la cuenca del río Tehuantepec (subgénero Neodawsonia, C. apicicephalium, C. nizandensis, C. totolapensis). Se desconoce qué factores condicionan este patrón de distribución endémico. El objetivo de este trabajo fue el proponer una hipótesis que explique el endemismo de sus especies, a partir de relaciones específicas entre la fisiología de los oxalatos de calcio y las propiedades de las rocas y de los suelos en los que habitan. En cada población se tomaron muestras del material parental (roca) del suelo, se removió tejido vegetal y se recolectaron semillas; estas...
Palavras-chave: Endemismo; Material Parental; Oxalato de calcio; Germinación; Filogenia; Endemism; Parent material; Calcium oxalate; Germination; Phylogeny; Doctorado; Botánica.
Ano: 2011
URL: http://hdl.handle.net/10521/458

Respuestas de Leucaena leucocephala en simbiosis con Rhizobium y/o micorriza en diferentes etapas de desarrollo durante la fitorremediación de fenantreno.
Provedor de dados: 32
Autores: Villegas Velázquez, Itzel.
En este estudio se evaluó la respuesta de semillas y plántulas de Leucaena leucocephala ante fenantreno (FEN), y el potencial de fitorremediación de FEN por la simbiosis tripartita Rhizobiun-Leucaena-Glomus, mediante el planteamiento de dos fases experimentales. En la primera fase, se evaluó el efecto de tres dosis de FEN (60, 80 y 100 mg L-1) y la inoculación de Rhizobium tropici CIAT 899 en semillas y desarrollo inmediato (10 días) de las plántulas de Leucaena. El FEN no afectó la conductividad eléctrica ni la germinación de semillas, mientras que Rhizobium estimuló la germinación únicamente a las 32 h. El FEN estimuló la longitud radical, pero redujo la longitud del tallo, inhibió la proliferación de pelos radicales y causó lesiones necróticas en...
Palavras-chave: Germinación; Desarrollo de plántulas; Actividad antioxidante; Compuestos fenólicos; Degradación; Germination; Seedling growth; Antioxidant activity; Phenolic compounds; Degradation; Maestría; Fisiología Vegetal.
Ano: 2011
URL: http://hdl.handle.net/10521/516

Caracterización de seis genotipo de amaranto (Amaranthus hypochondriacus L.) mediante los patrones de germinación de la semilla expuesta a herbicidas, ácido salicílico y compuestos análogos, sulfato de cobre y carencia de hierro
Provedor de dados: 32
Autores: Barrales Cureño, Hebert Jair.
"En México, existen algunas variedades seleccionadas de amaranto (A.  hypochondriacus) para las zonas templadas como la Línea 1, Mercado,  Nepal, Azteca y Mexicano, así como algunas razas criollas como la  Tulyehualco y la Mixteca, que por sus características agronómicas y  potencial de rendimiento son de las más importantes. El aprovechamiento  del amaranto es integral por utilizarse el grano y la planta como verdura y  forraje. Las variedades de amaranto Línea 1, Mercado, Nepal, Tulyehualco,  Criolla Tulyehualco y Criolla Mixteca fueron caracterizadas para diferenciar a  cada una de estas variedades de las demás de acuerdo a características  físicas: peso de 100 semillas y patrón de imbibición; así como características  fisiológicas de la semilla:...
Palavras-chave: Calidad de semilla; Germinación; T; Vigor; Sideróforos Quality of seed; Germination; T; Force; Siderophores.
Ano: 2008
URL: http://hdl.handle.net/10521/784

El aprovechamiento y la estructura poblacional de Agave kerchovei Lem., en Tehuacán-Cuicatlán, México.
Provedor de dados: 32
Autores: Brena Bustamante, Paulina.
El Valle de Tehuacán-Cuicatlán (VTC) es una provincia de gran riqueza etnoflorística en la que resalta el género Agave por su riqueza específica y los múltiples recursos que ofrece. Los agaves se reproducen por la vía sexual solo una vez en su ciclo de vida (semélparos). La información sobre Agave kerchovei Lem., “cacayas” (botones florales) o “Rabo de León” (planta) documenta que es de interés particular por el aprovechamiento de los botones florales. El objetivo de este estudio fue conocer el estado de dos poblaciones de A. kerchovei  mediante un análisis  etnobotánico, espacial y ecológico en dos áreas de aprovechamiento del VTC. En San Rafael, Puebla y San Gabriel Casa Blanca, Oaxaca, se realizaron entrevistas a hombres y mujeres; se describieron las...
Palavras-chave: Cacayas; Rabo de León; Etnobotánica; Reproducción; Germinación; Patrón de distribución; Demografía; Ethnobotany; Reproduction; Germination; Spatial distribution pattem; Demography; Maestría; Botánica.
Ano: 2012
URL: http://hdl.handle.net/10521/715

Distribución ecológica del subgénero Neodawsonia Backeb. del género Cephalocereus Pfeiff. (Cactaceae), en el Itsmo de Tehuantepec, México.
Provedor de dados: 32
Autores: Bárcenas Argüello, María Luisa.
Cephalocereus es un género monofilético, cuya distribución es alopátrica y está restringida a la Barranca de Metztitlán (C. senilis), al Valle de Tehuacán-Cuicatlán (C. columna-trajani) y a la cuenca del río Tehuantepec (subgénero Neodawsonia, C. apicicephalium, C. nizandensis, C. totolapensis). Se desconoce qué factores condicionan este patrón de distribución endémico. El objetivo de este trabajo fue el proponer una hipótesis que explique el endemismo de sus especies, a partir de relaciones específicas entre la fisiología de los oxalatos de calcio y las propiedades de las rocas y de los suelos en los que habitan. En cada población se tomaron muestras del material parental (roca) del suelo, se removió tejido vegetal y se recolectaron semillas; estas...
Palavras-chave: Endemismo; Material Parental; Oxalato de calcio; Germinación; Filogenia; Endemism; Parent material; Calcium oxalate; Germination; Phylogeny; Doctorado; Botánica.
Ano: 2011
URL: http://hdl.handle.net/10521/458

Respuestas de Leucaena leucocephala en simbiosis con Rhizobium y/o micorriza en diferentes etapas de desarrollo durante la fitorremediación de fenantreno.
Provedor de dados: 32
Autores: Villegas Velázquez, Itzel.
En este estudio se evaluó la respuesta de semillas y plántulas de Leucaena leucocephala ante fenantreno (FEN), y el potencial de fitorremediación de FEN por la simbiosis tripartita Rhizobiun-Leucaena-Glomus, mediante el planteamiento de dos fases experimentales. En la primera fase, se evaluó el efecto de tres dosis de FEN (60, 80 y 100 mg L-1) y la inoculación de Rhizobium tropici CIAT 899 en semillas y desarrollo inmediato (10 días) de las plántulas de Leucaena. El FEN no afectó la conductividad eléctrica ni la germinación de semillas, mientras que Rhizobium estimuló la germinación únicamente a las 32 h. El FEN estimuló la longitud radical, pero redujo la longitud del tallo, inhibió la proliferación de pelos radicales y causó lesiones necróticas en...
Palavras-chave: Germinación; Desarrollo de plántulas; Actividad antioxidante; Compuestos fenólicos; Degradación; Germination; Seedling growth; Antioxidant activity; Phenolic compounds; Degradation; Maestría; Fisiología Vegetal.
Ano: 2011
URL: http://hdl.handle.net/10521/516

Efecto de la aplicación de vermicomposta en la mitigación del estrés hídrico en plantas tipo C3 y C4.
Provedor de dados: 32
Autores: Aguilar Benítez, Gisela.
Se ha evidenciado que la vermicomposta puede mejorar la germinación y el crecimiento y productividad de las plantas; sin embargo, su efecto combinado con déficit de humedad ha sido escasamente documentado. El objetivo de esta investigación fue evaluar el efecto de la vermicomposta en la germinación, crecimiento inicial y rendimiento en plantas C3 y C4, con déficit de humedad en el suelo. En laboratorio se evaluó la germinación de dos cultivares de frijol y dos de maíz, con respuesta contrastante a sequía, en suelo sin y con 1.5, 3, 6 y 9 % de vermicomposta, y con potenciales de agua (ΨA) de -0.03 y -2 MPa; en invernadero se cuantificó el intercambio de gases y crecimiento de maíz, así como algunos componentes del rendimiento de frijol, en suelo sin y con...
Palavras-chave: Estrés; Floración; Semilla; Germinación; Uso eficiente del agua; Stress; Flowering; Seeds; Germination; Water use efficiency; Doctorado; Botánica.
Ano: 2011
URL: http://hdl.handle.net/10521/452

Germinación de semillas y sobrevivencia de plántulas de tres especies de Tillandsia y dos de Hechtia.
Provedor de dados: 32
Autores: Elizalde Castillo, Violeta.
Las bromelias (Bromelia spp.)  tienen  valor ornamental mundialmente y su explotación comercial en México y América va en aumento; sin embargo, su diversidad está amenazada por la deforestación de bosques y selvas,  por la extracción ilegal de especímenes, entre otras causas. El objetivo de este estudio es evaluar algunas condiciones que permitan obtener plantas a partir de semillas recolectadas de poblaciones naturales de Hechtia myriantha, H. perotensis, Tillandsia limbata, T. botterii y T. multicaulis. Se postula que existe una combinación adecuada de factores ambientales, que permiten que las semillas germinen adecuadamente y las plántulas tengan supervivencia estable. Se realizó la prueba de tetrazolio y germinación de semillas de H. perotensis; se...
Palavras-chave: Sobrevivencia; Germinación; Plántula; Semilla; Tetrazolio; Survival; Germination; Seedling; Seed; Tetrazolim; Botánica; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2326

Caracterización de seis genotipo de amaranto (Amaranthus hypochondriacus L.) mediante los patrones de germinación de la semilla expuesta a herbicidas, ácido salicílico y compuestos análogos, sulfato de cobre y carencia de hierro
Provedor de dados: 32
Autores: Barrales Cureño, Hebert Jair.
"En México, existen algunas variedades seleccionadas de amaranto (A.  hypochondriacus) para las zonas templadas como la Línea 1, Mercado,  Nepal, Azteca y Mexicano, así como algunas razas criollas como la  Tulyehualco y la Mixteca, que por sus características agronómicas y  potencial de rendimiento son de las más importantes. El aprovechamiento  del amaranto es integral por utilizarse el grano y la planta como verdura y  forraje. Las variedades de amaranto Línea 1, Mercado, Nepal, Tulyehualco,  Criolla Tulyehualco y Criolla Mixteca fueron caracterizadas para diferenciar a  cada una de estas variedades de las demás de acuerdo a características  físicas: peso de 100 semillas y patrón de imbibición; así como características  fisiológicas de la semilla:...
Palavras-chave: Calidad de semilla; Germinación; T; Vigor; Sideróforos Quality of seed; Germination; T; Force; Siderophores.
Ano: 2012
URL: http://hdl.handle.net/10521/784

Incidencia de enfermedades calidad postcosecha y contenido de glucosinolatos en brócoli.
Provedor de dados: 32
Autores: Lara Viveros, Francisco Marcelo.
El brócoli es una de las crucíferas de mayor consumo a nivel mundial. Esta planta posee un contenido elevado de glucosinolatos, metabolitos secundarios implicados en la prevención del cáncer. Actualmente se han reportado diferentes técnicas basadas en cromatografía de líquidos de alta resolución para determinar la concentración de estos compuestos. Como alternativa se propone usar la cromatografía en capa fina acoplada a densitometría para determinar la concentración y aislar estos compuestos. Se utilizaron placas precortadas de sílica gel, en la que se colocó una cantidad conocida de estándar de glucorafano. El coeficiente de retención (Rf) del glucorafano en este sistema fue de 0.6 y las lecturas del densitómetro indicaron que la máxima absorbancia del...
Palavras-chave: Brassica oleracea cv. italica; Glucorafano; Cocción; Imágenes digitales; Germinación; Colletotrichum; Germination; Doctorado; Fisiología Vegetal.
Ano: 2010
URL: http://hdl.handle.net/10521/344

PROCESSING IN THE QUALITY OF TANZANIA GRASS SEEDS
Provedor de dados: 70
Autores: Melo,Lilian F. De; Martins,Cibele C.; Silva,Givanildo Z. Da; Sanches,Mauricio F. G.
ABSTRACT The available research concerning the processing of grass seeds is scarce, despite its fundamental importance for national and international agribusiness. The objective of this project was to evaluate the effects of processing phases on the physical and physiological quality of tanzania grass seeds for commercialization purposes. Seeds were sampled before processing and after leaving the air and screen machine (upper and intermediate screens and bottom); first gravity table (drift, upper and intermediate spouts); treating machine; second gravity table (upper, intermediate, and lower spouts). Seeds were evaluated as to water content, physical quality (purity and 1,000 seeds weight) and physiological (germination, first count of germination,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Panicum maximum; Pastures; Tropical grass; Vigor.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601157

Sowing performance by a metering mechanism of continuous flow in different slope conditions
Provedor de dados: 70
Autores: CORREIA,TIAGO P. DA S.; SOUSA,SAULO F. G. DE; SILVA,PAULO R. A.; DIAS,PATRÍCIA P.; GOMES,ANDERSON R. A.
ABSTRACT One of the reasons for the success of a productive culture is the correct sowing. Therefore, the seeds must be properly dosed, deposited and not damaged by the metering mechanism of the seed drill. So, the aim of this study was to evaluate in a simulator the sorghum seed deposition by a metering mechanism with continuous flow in different conditions of slope and sowing speed, and evaluate the quality of the deposited seeds assessing mechanical damage and germination. The experiment was carried out at the College of Agricultural Sciences, UNESP in Botucatu-SP, being used a simulator equipped with seed metering mechanism of helical channelled rotor type. The experimental design was randomized in a 3 x 2 factorial arrangement with six replications....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deposition; Germination; Mechanical damage; Sowing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500839

FUZZY SLIDING-MODE TEMPERATURE-CONTROL SYSTEM FOR SOAKING AND GERMINATION OF RICE SEEDS
Provedor de dados: 70
Autores: Zhou,Zheng; Liang,Chunying.
ABSTRACT The soaking and germination process of rice seeds is the starting point in rice cultivation in cold regions and has a significant effect on grain yield. Efficient techniques for controlling the water temperature in the seed tank are required to enhance germination quality. This paper introduces a fuzzy theory for designing a fuzzy logic-based sliding mode controller (SMC) system for a rice seed soaking and germination device. The proposed system was theoretically and experimentally investigated to determine the efficiency of the soaking temperature-control system. A modified fuzzy SMC based on exponent approaching law is also presented for optimizing the proposed controller. A proportional integral derivative (PID) controller was designed to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fuzzy sliding-mode control; Temperature controller; Soaking; Germination.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200215

MORPHOANATOMY OF NOTHOFAGUS ALESSANDRII SEEDS AND ITS USE IN THE VARIABILITY OF POPULATIONS
Provedor de dados: 73
Autores: Navarro-Cerrillo,Rafael Mª; Santelices,Rómulo; Ruiz Rodríguez,Alberto; Cabello Lechuga,Angel.
Nothofagus alessandrii is an endangered species that is endemic to the Mediterranean area of Chile. There is no information on the anatomical structure of its seeds and there are few studies on the morphometric and germination differences between its populations. Therefore, the purpose of this study was to describe the morpho-anatomical structure of seeds of N. alessandrii in order to compare the morphology and germination four geographically distinct populations. This was done by selecting seeds of four different origins covering the entire latitudinal distribution of the species and measuring their size, shape, dry weight and germination in order to perform a comparative analysis. Results showed that the anatomical structure of N. alessandrii seeds is...
Tipo: Journal article
Palavras-chave: Nothofagaceae; Seed; Ruil; Germination; Anatomy.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432013000100011

YUCCA4 overexpression modulates auxin biosynthesis and transport and influences plant growth and development via crosstalk with abscisic acid in Arabidopsis thaliana
Provedor de dados: 74
Autores: Munguía-Rodríguez,Aarón Giovanni; López-Bucio,Jesús Salvador; Ruiz-Herrera,León Francisco; Ortiz-Castro,Randy; Guevara-García,Ángel Arturo; Marsch-Martínez,Nayelli; Carreón-Abud,Yazmín; López-Bucio,José; Martínez-Trujillo,Miguel.
Abstract Auxin regulates a plethora of events during plant growth and development, acting in concert with other phytohormones. YUCCA genes encode flavin monooxygenases that function in tryptophan-dependent auxin biosynthesis. To understand the contribution of the YUCCA4 (YUC4) gene on auxin homeostasis, plant growth and interaction with abscisic acid (ABA) signaling, 35S::YUC4 seedlings were generated, which showed elongated hypocotyls with hyponastic leaves and changes in root system architecture that correlate with enhanced auxin responsive gene expression. Differential expression of PIN1, 2, 3 and 7 auxin transporters was detected in roots of YUC4 overexpressing seedlings compared to the wild-type: PIN1 was down-regulated whereas PIN2, PIN3 and PIN7...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arabidopsis; Auxin; Abscisic acid; YUCCA4; Root growth; Germination.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100302

Expression of stress-related genes in zebrawood (Astronium fraxinifolium, Anacardiaceae) seedlings following germination in microgravity
Provedor de dados: 74
Autores: Inglis,Peter W.; Ciampi,Ana Y.; Salomão,Antonieta N.; Costa,Tânia da S.A.; Azevedo,Vânia C.R.
Seeds of a tropical tree species from Brazil, Astronium fraxinifolium, or zebrawood, were germinated, for the first time in microgravity, aboard the International Space Station for nine days. Following three days of subsequent growth under normal terrestrial gravitational conditions, greater root length and numbers of secondary roots was observed in the microgravity-treated seedlings compared to terrestrially germinated controls. Suppression subtractive hybridization of cDNA and EST analysis were used to detect differential gene expression in the microgravity-treated seedlings in comparison to those initially grown in normal gravity (forward subtraction). Despite their return to, and growth in normal gravity, the subtracted library derived from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microgravity; Stress response; Germination; Suppression subtractive hybridization; Zebrawood.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000100014

Accelerated aging to assess parsley seed vigor
Provedor de dados: 75
Autores: Tunes,Lilian M de; Pedroso,Daniele C; Gadotti,Gizele Ingrid; Muniz,Marlove Fátima B; Barros,Antonio Carlos SA; Villela,Francisco A.
There are many gaps for the assessment of seed vigor in vegetable crops, among these the parsley. In this context, the accelerated aging test is recognized as one of the most widely used to evaluate seed physiological potential of various crop species, being able to provide information with a high degree of consistency. Thus, the objective of the present study was to evaluate the methodology of accelerated aging test to check parsley seed vigor, as well as verify the possibility of using NaCl solutions as an alternative to control seed water uptake during the aging period without reducing test sensitivity. Four lots of parsley seeds were tested for germination, seedling emergence, and accelerated aging for 48, 72 and 96 h (traditional and NaCl solutions)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Petroselinum sativum; Germination; SSAA; Vegetables; Vigor.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000300018

Phosphorus rates on yield and quality of lettuce seeds
Provedor de dados: 75
Autores: Kano,Cristiaini; Cardoso,Antonio Ismael Inácio; Bôas,Roberto L Villas.
Because of lack of information about phosphorus fertilization in lettuce from the standpoint of seed production, this study was undertaken. The work was carried out in Botucatu, São Paulo state, Brazil, from September 25, 2003 to February 19, 2004, in order to study the influence of crescents phosphorus rates on yield and quality of lettuce seeds, cultivar Verônica. The experimental design was randomized blocks with five treatments (0; 200; 400; 600 and 800 kg ha-1 of P2O5) and five replications. The following characteristics were evaluated: seed production per plant (g plant-1), number of seeds per plant and quality (percentage of germination and seed vigor). A linear increasing was observed on production and number of seeds per plant of lettuce with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Phosphorus fertilization; P2O5; Germination; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000400021

Controlled deterioration to evaluate okra seed vigor
Provedor de dados: 75
Autores: Torres,Salvador B; Gomes,Maryjane DA; Silva,Francisca Gleiciane da; Benedito,Clarisse P; Pereira,Francisco ECB.
Germination and vigor tests are essential components of seed quality control programs adopted by seed industries. We studied different procedures to perform the controlled deterioration test to identify differences in vigor among okra seed lots. Four seed lots of Colhe Bem cultivar and five seed lots of Santa Cruz 47 cultivar were submitted to the following tests: germination, seedling emergence, controlled deterioration (seeds with moisture contents of 18, 21 and 24% at 45°C for 24 and 48 hours) and moisture content. The controlled deterioration test is efficient to evaluate the physiological potential of okra seeds, and the combination of 24% water, 45°C during 24 hours is recommended.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abelmoschus esculentus; Physiological potential; Vigor; Germination.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000200023

Plant spacing and pollen quantity on yield and quality of squash seeds
Provedor de dados: 75
Autores: Lima,Márcio S. de; Cardoso,Antonio I. I.; Verdial,Marcelo F.
Squash seeds yield and quality can be improved by proper population plant spacing and the pollen quantity, which influences the pollination quality and fertilization. Nine experiments were conducted as a factorial combination of three spacing between plants (0.8 x 0.3, 0.8 x 0.6 and 0.8 x 0.9 m), two quantities of pollen (50% of an anther and another entire one) and natural insect pollination. Seed and fruit production parameters, and seed quality were evaluated. A randomized complete block design, five replications, with ten plants per plot was adopted. Larger plant spacing increased the average number of mature fruits and seed yield per plant. Seed yield was directly proportional to the amount of pollen used during pollination. Higher amounts of pollen...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita pepo L.; Pollination; Germination; Vigor.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362003000300005

Priming and drying on the physiological quality of eggplant seeds
Provedor de dados: 75
Autores: Gomes,Delineide P; Silva,Alexandre F da; Dias,Denise Cunha FS; Alvarenga,Eveline M; Silva,Laércio J da; Panozzo,Luis Eduardo.
We evaluated the effect of the priming with polyethyleneglicol (PEG) 6000 followed or not of drying on two lots of eggplant seeds with medium and low vigor respectively. The seeds were submitted to the treatments of priming with PEG 6000 in the osmotic potentials of -0.6, -0.9 and -1.2 MPa during 48 or 96 hours of priming with and without subsequent drying. For the soaking of seeds in osmotic solutions, these were placed over three sheets of paper boxes such germitest gerbox conditioning moistened with each solution in a 3:1 ratio. The control group was represented by unprimed seeds. The priming for both lots provided higher values in relation to the vigor through the first counting of germination, seedlings and primary root length, germination and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum gilo; Priming; Vigor; Germination.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000300021

Seed physiological potential of “dedo-de-moça” pepper in relation to maturation stages and rest periods of the fruits
Provedor de dados: 75
Autores: Gonçalves,Leandro SA; Gomes,Gisely Paula; Damasceno Junior,Clério Valentin; Queiroz,Robison Alessandro de; Takahashi,Lucia SA; Costa,Denis S da; Nunes,Maria PBA.
ABSTRACT One of the main problems in pepper seed production is the uneven maturation of the fruits due to the continuous flowering period of the plant, making it difficult to harvest all the fruits at the same time. Thus, studies on fruit maturation stage and seed physiological potential are extremely important in order to identify the appropriate harvest time, avoiding seed deterioration. The aim of this study was to evaluate the physiological potential of five genotypes of “dedo de moça” pepper seeds (Capsicum baccatum var. pendulum) in three maturation stages (green, orange and red), with and without 10-day rest period after harvest date. Physiological potential and vigor of seeds were evaluated through germination tests (first count, accelerated aging...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum baccatum var. pendulum; Accelerated aging; Germination; Vigor.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000400486

Seed disinfestation methods for in vitro cultivation of epiphyte orchids from Southern Brazil
Provedor de dados: 75
Autores: Alvarez-Pardo,Veronica M; Ferreira,Alfredo Gui; Nunes,Valter F.
Disinfestation of orchid seeds is necessary when the germination is performed in vitro. In such case, cultures are supplemented by a source of sugar and salts in order to obtain energy and other requirements. However, the presence of sugar and salts easily allows the development of unwanted microorganisms. To avoid such phenomenon, an efficient procedure must be done as a pretreatment of the seeds with liquid or gaseous substances. In this study with several Brazilian orchids, the seeds were disinfested with sodium hypochlorite solutions containing 0.4% or 0.8% active chlorine for five minutes and sodium hypochlorite or formaldehyde fumes up to two hours, this procedure being efficient for such purpose and making it possible to be used routinely.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Orchids; In vitro culture; Germination; Sodium hypoclorite; Formaldehyde.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362006000200019

Caracterização e avaliação de patauá e bacaba (complexo Oenocarpus/Jessenia).
Provedor de dados: 14
Autores: OLIVEIRA, M. do S. P. de; MOTA, M. G. da C.; CARVALHO, J. E. U. de.
bitstream/item/60218/1/CPATU-PA161.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Avaliação; Germinação da semente; Jessenia; Evaluation; Plant development stages; Seed.; Bacaba; Etapa de Desenvolvimento da Planta; Germoplasma; Patauá; Produtividade.; Oenocarpus; Germination; Germplasm; Palm oils; Yields.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374254

Germinação de sementes de jutaí-açu (Hymenaea courbaril L.) e de jutaí-mirim (H. parvifolia Huber) escarificadas com ácido sulfúrico comercial.
Provedor de dados: 14
Autores: CARPANEZZI, A. A.; MARQUES, L. C. T.
bitstream/item/33541/1/CPATU-CirTec19-2.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Jutai-acu; Jutai-mirim; Escarificacao; Seed; Escarification; Leguminous.; Ácido Sulfúrico; Hymenaea Courbaril; Hymenaea Parvifolia; Germinação; Leguminosa; Semente; Tecnologia.; Germination; Sulfuric acid; Technology.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379781

Germinação de sementes de bacabinha (Oenocarous mapora Karsten).
Provedor de dados: 14
Autores: QUEIROZ, J. A. L. de.
O presente trabalho foi conduzido no Campo Experimental de Fazendinha, com o objetivo de avaliar métodos para acelerar e uniformizar a germinação de sementes de bacabi.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Bacabinha; Oenocarpus mapora.; Germinação; Semente.; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345878

Superação da dormência e germinação de sementes de erva-mate (Ilex paraguariensis St. Hil.).
Provedor de dados: 14
Autores: MEDEIROS, A. C. de S.; NOGUEIRA, A. C.; AMAZONAS, M. A. L. de A.; GRIGOLETTI JUNIOR, A.; PEREIRA NETTO, A.; REICHER, F.; URBEN, A. F.
bitstream/CNPF-2009-09/16580/1/pesq-andam-41.PDF
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Erva-mate.; Dormência; Germinação; Ilex Paraguariensis; Semente.; Germination; Dormancy; Seeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/290823

Escarificação química na emergência de sementes de castanha-do-brasil.
Provedor de dados: 14
Autores: FRAZÃO, D. A. C.; MULLER, C. H.; FIGUEIRÊDO, F. J. C.; MÜLLER, A. A.; PEREIRA, L. A. F.
bitstream/item/31923/1/CPATU-BP56.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Castanha-do-brasil; Substancia quimica; Maraba; Pará; Brasil; Brazil nut; Chemistry substance; Seed; Vigour; Seeding.; Bertholletia Excelsa; Germinação; Plântula; Semente.; Amazonia; Germination; Vigor.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381696

Banco de sementes de café em criopreservação: experiência inédita no Brasil.
Provedor de dados: 14
Autores: EIRA, M. T. S.; REIS, R. B.; RIBEIRO, F. N. S.; RIBEIRO, V. S.
bitstream/CENARGEN/26622/1/ct042.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Banco; Coffee; Bank.; Café; Armazenamento; Criopreservação; Germinação; Germoplasma.; Coffea; Germination; Germplasm.; Cryopreservation.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/187030

Pimenta longa: produção de mudas por sementes.
Provedor de dados: 14
Autores: GATO, R. F.; SILVA, E. S. A.; OLIVEIRA, C. D. de S.; ROCHA NETO, O. G. da.
bitstream/item/60883/1/CPATU-Doc100.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Cultivo; Produção de muda; Germinação de semente; Controle de praga; Controle de doença; Piper hispidinervium; Brasil; Cultivation; Seed production.; Pimenta Longa.; Amazonia; Disease control; Germination; Pest control; Seedlings.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375173

Efeito da sacarose e luminosidade sobre a germinação "in vitro" de embriões de cedro.
Provedor de dados: 14
Autores: LAMEIRA, O. A.; GOMES, A. P. do R.; LOPES, S. da C.
bitstream/item/39862/1/Com-Tec-20-Am-Oriental.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Belém; Pará; Brasil.; Cedro; Cedrela Odorata; Essência Florestal; Germinação; Sacarose.; Amazonia; Germination; Forest trees; Sucrose.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377938

Aspectos bioquímicos e mobilização de reservas na emergência de sementes de cupuaçuzeiro.
Provedor de dados: 14
Autores: FIGUEIREDO, F. J. C.; CARVALHO, C. J. R. de; ROCHA NETO, O. G. da.
bitstream/item/34436/1/ORIENTAL-BP12.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Emergence.; Bioquímica; Cupuaçu; Emergência; Germinação; Semente; Theobroma Grandiflorum.; Germination; Biochemistry; Seeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377489

Ensaio de procedências de Cordia alliodora no planalto de Belterra-Pará.
Provedor de dados: 14
Autores: KANASHIRO, M.; YARED, J. A. G.; MARQUES, L. C. T.
bitstream/item/57811/1/CPATU-PA13.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Freijó-louro; Ensaio de procedência; Survival; Growth.; Cordia Alliodora; Crescimento; Essência Florestal; Germinação; Sobrevivência.; Forest trees; Germination; Provenance; Testing.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377566

Germinacao de gramineas dos cerrados: Echinolaena inflexa e Paspalum erianthum.
Provedor de dados: 14
Autores: SILVA, J. C. S.; ROCHA FILHO, G. A. da.
bitstream/item/102127/1/pesq-25.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Echinolaena inflexa; Capim flexinha; Paspalum erianthum; Planta nativa; Indigenous organisms.; Capim Branco; Cerrado; Gramínea; Germinação; Reprodução.; Grasses; Germination; Reproduction.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549366

Avaliação de tratamentos para a quebra da dormência das sementes de araticum.
Provedor de dados: 14
Autores: PEREIRA, E. B. C.; PEREIRA, A. V.; MELO, J. T.; SOUSA-SILVA, J. C.; FALEIRO, F. G.
bitstream/CPAC-2009/25306/1/p2004_29.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: GA.; Ácido Giberélico; Annona Crassiflora; Araticum; Dormência da Semente; Germinação; Propagação Vegetativa; Semente.; Dormancy; Germination; Plant propagation; Seeds.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568306

Germinação de sementes de bacaba (Oenocarpus bacaba Mart.) nas condições do Estado do Amapá.
Provedor de dados: 14
Autores: QUEIROZ, J. A. L. de.
Com o objetivo de avaliar métodos para acelerar a germinação de sementes de bacaba, a Embrapa Amapá conduziu o presente trabalho no Campo Experimental e de Produção de Mudas de Fazendinha.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Oenocarpus bacaba; Tropical fruits; Oil palms.; Bacaba; Fruta Tropical; Germinação; Palmeira Oleaginosa; Semente.; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345524

Armazenamento de sementes de juta.
Provedor de dados: 14
Autores: FIGUEIREDO, F. J. C.; CARVALHO, J. E. U. de; FRAZÃO, D. A. C.
bitstream/item/31930/1/CPATU-BP63.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Camara fria e seca; Condicoes ambientais; Vigour; Moisture content; Packing; Cold and dry chamber; Enviromental condition.; Embalagem; Germinação; Teor de Umidade.; Germination; Vigor.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383658

Efeito do método de secagem na germinação de sementes de Passiflora nitida e Passiflora setaceae (2009).
Provedor de dados: 14
Autores: ANDRADE, S. R. M. de; FALEIRO, F. G.; ARAÚJO, C. S. de; JUNQUEIRA, N. T. V.
bitstream/item/78158/1/p2009-046.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Passiflora setaceae; Produção de mudas.; Germinação; Maracujá.; Passiflora nitida; Germination; Passion fruits; Seedlings.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/748321

Aplicação sistemática de defensivos na produção de sementes de caupi.
Provedor de dados: 14
Autores: FIGUEIREDO, F. J. C.; CARVALHO, J. E. U. de; FRAZÃO, D. A. C.
bitstream/item/40985/1/Boletim-Pesquisa-71-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Caupi; Campo Experimental de Tracuateua; Braganca; Pará; Brasil; Cowpea; Pulverization; Infestation; Yield; Insecticide; Fungicide.; Fungicida; Infestação; Inseticida; Germinação; Produtividade; Pulverização; Vigna Unguiculata.; Amazonia; Germination; Vigor.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383610

Conservação de sementes de morototó (Didymopanax morototoni (Aublet.) Decne).
Provedor de dados: 14
Autores: LEÃO, N. V. M.
bitstream/item/31931/1/CPATU-BP64.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Belterra; Santarém; Pará; Brasil; Seed; Conservation.; Armazenamento; Germinação; Semente.; Amazonia; Germination; Storage.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383596

Inibidores de Germinação no Fruto e em Sementes de Pequi (Caryocar brasiliense Camb.) .
Provedor de dados: 14
Autores: MELO, J. T. de; GONCALVES, A. N.
bitstream/item/75930/1/bolpd-34.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Fruta nativa; Planta nativa; Indigenous organisms; Plant growth regulators.; Caryocar Brasiliense; Cerrado; Dormência da Semente; Fruto; Germinação; Pequi; Regulador de Crescimento.; Dormancy; Germination; Seeds.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547914

Substratos e temperaturas para a germinação de sementes de magnólia-amarela (Michelia champaca Linn).
Provedor de dados: 14
Autores: BIANCHETTI, A.; ZANON, A.; FOWLER, J. A. P.
O trabalho objetiva determinar os melhores substratos e temperaturas para a germinação de sementes de magnolia-amarela.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Madeira; Magnólia Amarela; Michelia Champaca; Semente.; Germination; Seeds; Wood.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345883

Escarificação mecânica e reguladores vegetais para superação da dormência de sementes de Passiflora setacea D.C.
Provedor de dados: 14
Autores: COSTA, C. J.; SIMÕES, C. DE O.; COSTA, A. M.
bitstream/item/75853/1/bolpd-271.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Passiflora setacea D.C.; Propagação; Quebra de dormência; Passion fruit; Wild passiflora; Breaking dormancy.; Germinação; Maracujá.; Germination; Plant propagation; Seed dormancy.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/881945

Efeitos do tempo de imersão, da concentração de ácido giberélico e da planta-matriz na germinação de pequi.
Provedor de dados: 14
Autores: PEREIRA, A. V.; PEREIRA, E. B. C.; SILVA, D. B. da; GOMES, A. C.; SOUSA-SILVA, J. C.
bitstream/CPAC-2009/25299/1/p2004_24.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Indigenous organisms; GA.; Ácido Giberélico; Caryocar Brasiliense; Cerrado; Espécie Nativa; Germinação; Pequi; Propagação Vegetativa; Semente.; Germination; Plant propagation; Seeds.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568299

Método para avaliar a germinação pré-colheita em genótipos de trigo: desenvolvimento analítico e aplicação.
Provedor de dados: 14
Autores: GUARIENTI, E. M.; PIRES, J. L. F.; CASTRO, R. L. de; CUNHA, G. R. da; VALENTINI, A. P. F.; ROSA, A. C.; CAIERAO, E.; REIS, E. M.; FRANCO, F. de A.; DALMAGO, G. A.; WAGNER, J. F.; OKUYAMA, L. A.; MOLSSATO, L. L.; MELLO, L. G. de; SÓ E SILVA, M.; BRISTOT, M.; SCHEEREN, P. L.; AIRES, R. F.; TONON, V. D.
bitstream/item/177673/1/ID44328-2017BPDO87.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Trigo; Qualidade; Germinação; Wheat; Crop quality; Germination.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1091911

Tratamento de sementes de caupi e a qualidade fisiológica durante o armazenamento.
Provedor de dados: 14
Autores: FIGUEIREDO, F. J. C.; DUARTE, M. de L. R.; SILVA, A. de B.; CARVALHO, J. E. U. de.
bitstream/item/31932/1/CPATU-BP65.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Caupi; Campo Experimental de Tracuateua; Braganca; Pará; Brasil; Cowpea; Infestation; Insect.; Bactéria; Armazenamento; Fungo; Inseto; Germinação; Vigna Unguiculata.; Amazonia; Germination; Fungi; Storage; Vigor.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381133

Escarificação mecânica e embebição na germinação de sementes de castanha-do-brasil.
Provedor de dados: 14
Autores: PEREIRA, L. A. F.; MÜLLER, C. H.; MÜLLER, A. A.; FIGUÊIREDO, F. J. C.; FRAZÃO, D. A. C.
bitstream/item/28826/1/CPATU-BP10.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Castanha-do-brasil; Escarificacao; Maraba; Pará; Brasil; Seed; Scarification.; Bertholletia Excelsa; Embebição; Germinação; Semente.; Brazil nuts; Amazonia; Germination; Soaking.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376820

Conservação de sementes de andiroba (Carapa guianensis Aubl.).
Provedor de dados: 14
Autores: VIANNA, N. G.
bitstream/item/33853/1/CPATU-CirTec34.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Armazenagem; Crab tree; Seed; Conservation; Package.; Andiroba; Carapa Guianensis; Conservação; Embalagem; Germinação; Semente.; Germination; Storage.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381968

Castanha-do-brasil: resultados de pesquisa.
Provedor de dados: 14
Autores: MÜLLER, C. H.; RODRIGUES, I. A.; MÜLLER, A. A.; MÜLLER, N. R. M.
bitstream/item/60081/1/Miscelanea-2.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Castanha-do-brasil; Classificação botânica; Enxertia; Biologia floral; Cultivo; Pará; Brasil; Brazil-nut; Botanical classification; Grafting; Biology; Cultivation.; Germinação; Melhoramento; Polinização.; Amazonia; Breeding; Germination; Pollination.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378091

Importância do tamanho da semente de caupi no armazenamento e na produtividade.
Provedor de dados: 14
Autores: FIGUEIRÊDO, F. J. C.; FRAZÃO, D. A. C.; CARVALHO, J. E. U. de.
bitstream/item/31949/1/CPATU-BP79.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Caupi; Armazenagem; Campo experimental de Tracuateua; Braganca; Pará; Brasil; Infestation; Produtivity.; Germinação; Infestação; Produtividade; Vigna Unguiculata.; Amazonia; Germination; Storage; Vigor.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383708

Colheita antecipada de frutos e tratamentos pré-germinativos para a germinação de sementes de mandiocão (Didymopanx morototoni (Aublet) Ecaisne et Planchon).
Provedor de dados: 14
Autores: BIANCHETTI, A.; FOWLER, J. A. P.; ZANON, A.
O trabalho objetiva, através da condução de um experimento, verificar a viabilidade de sementes obtidas de colheita antecipada de infrutencias, em um estadio anterior a mudança de coloração dos frutos de verde para violeta, diminuindo com isto a competição dos animais, e pelas mesmas apresentarem baixa porcentagem inicial de germinação.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Mandiocão; Didymopanx morototoni.; Germinação; Semente.; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345885

Germinação e dormência de sementes de Ageratum conyzoides L.
Provedor de dados: 14
Autores: IKEDA, F. S.; CARMONA, R.; MITJA, D.; GOMES, A. C.
bitstream/CPAC-2009/27661/1/p2006_01.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Planta daninha; Planta invasora; Dormência de semente.; Ageratum Conyzoides; Germinação.; Germination; Dormancy; Plant propagation; Weeds.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570139

Germinação de sementes de mangaba (Hancornia Speciosa Gomes).
Provedor de dados: 14
Autores: QUEIROZ, J. A. L. de.
Com o objetivo de avaliar métodos para acelerar a germinação de sementes de mangaba, a Embrapa Amapá conduziu o presente trabalho no Campo Experimental e de Produção de Mudas da Fazendinha.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Tropical fruits.; Fruta Tropical; Hancornia Speciosa; Germinação; Mangaba; Semente.; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345523

Efeito da temperatura na germinacao de sementes de Eucalyptus urophylla S.T. Blake.
Provedor de dados: 14
Autores: MOURA, V. P. G.
bitstream/item/114855/1/bolpd-15.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Seed; Efeito.; Eucalyptus Urophylla; Eucalipto; Essência Florestal; Germinação; Semente; Temperatura.; Germination; Temperature.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549443

Estabelecimento inicial de cultivares de cana-de-açúcar em Planaltina - DF.
Provedor de dados: 14
Autores: MULLER, J. A.; CARGNIN, A.; MELLO, F. D. A.; FOGAÇA, C. M.
bitstream/item/78164/1/p2009-052.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cana-de-açúcar; Cultivo.; Brotacao; Cerrado; Saccharum Officinarum.; Germination; Sugarcane; Varieties.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/748343

Conservação de sementes de caupi.
Provedor de dados: 14
Autores: FIGUEIRÊDO, F. J. C.; FRAZÃO, D. A. C.; OLIVEIRA, R. P. de; CARVALHO, J. E. U. de.
bitstream/item/33796/1/CPATU-CirTec31.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Caupi; Armazenagem; IPEAN-V-69; Campo Experimental de Tracuateua; Pará; Brasil; Cowpea; Seed; Conservation; Vigour; Quality; Package.; Conservação; Embalagem; Fisiologia; Germinação; Qualidade; Semente; Vigna Unguiculata.; Amazonia; Germination; Physiology; Storage; Vigor.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381808

Avaliação de progênies de açaizeiro promissoras para frutos em diferentes fases de desenvolvimento.
Provedor de dados: 14
Autores: OLIVEIRA, M. do S. P. de; CARVALHO, J. E. U. de; TRINDADE, D. R.; SOUZA, L. A. de; LINHARES, L. C. F.
bitstream/item/52958/1/PesquisaAnd0110001.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Avaliação de progênie; Pará; Brasil.; Açaí; Euterpe Oleracea; Germinação; Melhoramento Genético Vegetal; Sementeira; Viveiro.; Amazonia; Germination; Plant nurseries; Plant breeding; Progeny; Seedbeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374658

Efeito da forma do propágulo na germinação da cana-de-açúcar (2009).
Provedor de dados: 14
Autores: MULLER, J. A.; CARGNIN, A.; REIN, T. A.; MELLO, F. D. A.; FOGAÇA, C. M.; FEITOSA, W. de M.; MOURA, S. B. de; PIERDONÁ, R.
bitstream/item/78154/1/p2009-043.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cana-de-açúcar; Plantio de mudas.; Germination; Sugarcane; Varieties.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/747777

Germinação de sementes de espécies amazônicas: puxuri [Licaria puchury-major (Mart.) Kosterm.].
Provedor de dados: 14
Autores: CRUZ, E. D.; KATO, O. R.
Tipo: Folhetos
Palavras-chave: Puxuri; Licaria puchury-major; Germinação; Semente; Beneficiamento; Biometria; Armazenamento; Processamento; Germination; Seed germination; Seeds; Biometry; Storage technology.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1139901

Germinação de sementes de guaraná provenientes de diferentes épocas de colheita.
Provedor de dados: 14
Autores: CARVALHO, J. E. U. de; FIGUEIRÊDO, F. J. C.; FRAZÃO, D. A. C.; KATO, A. K.
bitstream/item/40417/1/Boletim-Pesquisa-17-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Belém; Pará; Brasil; Seed.; Época de Colheita; Germinação; Guaraná; Paullinia Cupana; Semente.; Amazonia; Germination; Harvest date; Vigor.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378280

Germinação de sementes de biriba (Rollinia mucosa Bail).
Provedor de dados: 14
Autores: QUEIROZ, J. A. L. de.
O objetivo do trabalho foi de avaliar métodos para acelerar a germinação de sementes de biriba, cujos experimentos foram conduzidos no Campo Experimental e de Produção de Mudas da Fazendinha.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Tropical fruits.; Biriba; Fruta Tropical; Germinação; Semente.; Rollinia Mucosa; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345522

Armazenamento de sementes de caupi em regiões fisiográficas do Estado do Pará.
Provedor de dados: 14
Autores: FIGUEIRÊDO, F. J. C.; FRAZÃO, D. A. C.; OLIVEIRA, R. P. de; CORRÊA, J. R. V.
bitstream/item/33789/1/CPATU-CirTec30.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Caupi; Armazenagem; IPEAN-v-69; Capitao-Poco; Alenquer; Altamira; Belem; Braganca; Pará; Brasil; Cowpea; Seed; Vigour; Package; Quality.; Embalagem; Fisiologia; Germinação; Qualidade; Semente; Vigna Unguiculata.; Amazonia; Germination; Physiology; Storage; Vigor.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381807

Suscetibilidade das principais cultivares de soja utilizadas no Brasil ao dano de embebicao no teste de germinacao.
Provedor de dados: 14
Autores: FRANCA NETO, J. de B.; KRZYZANOWSKI, F. C.; HENNING, A. A.; COSTA, N. P. da.
bitstream/CNPSO/17090/1/comTec060.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Soybean; Seed.; Germinação; Semente; Tecnologia.; Soja; Brazil; Germination; Technology.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/461381

Análises das sementes de Cratylia argentea: cultura potencial para adubação verde e forragem.
Provedor de dados: 14
Autores: ARAÚJO, S. N.; MATRANGOLO, W. J. R.; MIRANDA, G. A. de; NETTO, D. A. M.; SILVA, I. H. S. da.
A Cratília é leguminosa arbustiva nativa do cerrado, tolerante à seca e a solos ácidos e tem potencial para adubação verde e forrageamento. Por essas características, pode ser utilizada pelo agricultor familiar. Objetivou-se verificar a viabilidade das sementes para posterior produção de mudas e doação a produtores familiares. As vagens foram coletadas de 126 plantas da EPAMIG. Após secagem em estufa, as vagens foram pesadas e debulhadas manualmente, resultando em 14,8 kg de sementes. Essas foram armazenadas em sacos de papel em câmara fria e seca. Foram realizadas as análises de pureza física, peso de mil sementes, determinação do grau de umidade e dois testes de germinação, sendo um inicial e outro após dois meses de armazenamento. Os testes seguiram as...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Leguminosa; Germinação; Semente; Seeds; Germination; Fabaceae.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/911424

Substratos e temperaturas para a germinação de sementes de Alnus subcordata C. A. Mey.
Provedor de dados: 14
Autores: BIANCHETTI, A.; FOWLER, J. A. P.; ZANON, A.
O trabalho visa determinar condições ótimas para o teste de germinação das sementes de Alnus subcordata C. A. Mey.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Tree.; Árvore; Germinação; Semente.; Alnus subcordata; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345884

Germinacao de gramineas dos cerrados: Schizachyrium tenerum.
Provedor de dados: 14
Autores: ROCHA FILHO, G. A. da; SILVA, J. C. S.
bitstream/item/102125/1/pesq-23.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Schizachyrium tenerum; Planta nativa; Indigenous organisms.; Cerrado; Germinação; Gramínea; Semente.; Grasses.; Germination.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549364

Produtividade e qualidade fisiológica de sementes de caupi colhidas em diferentes épocas.
Provedor de dados: 14
Autores: FIGUEIREDO, F. J. C.; FRAZÃO, D. A. C.; OLIVEIRA, R. P. de; CARVALHO, J. E. U. de.
bitstream/item/40155/1/Circ-Tec-50-CPATU.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Caupi; Produtivadade; IPEAN-V-69; Campo Experimental de Tracuateua; Bragança; Pará; Brasil; Cowpea; Seed; Yield; Quality.; Época de Colheita; Fisiologia; Germinação; Semente; Qualidade; Vigna Unguiculata.; Amazonia; Harvest date; Germination; Physiology.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383612

Germinacao e viabilidade de Enterolobium gummiferum (Mart.) Macb. (Leguminosae) e plathymenia reticulata benth. (Leguminosae).
Provedor de dados: 14
Autores: ROCHA, H. M. de C.; SOUSA-SILVA, J. C.
bitstream/CPAC-2009/24347/1/p2002_73.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Indigenous organisms; Seed.; Cerrado; Espécie Nativa; Propagação Vegetativa; Semente.; Reprodução Sexuada; Germination; Plant propagation; Sexual reproduction.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567649

Tamanho de sementes de cupuaçuzeiro, Theobroma grandiflorum: emergência e vigor.
Provedor de dados: 14
Autores: MULLER, C. H.; FIGUEIREDO, F. J. C.
bitstream/item/32014/1/CPATU-BP111.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Belem; Pará; Brasil; Cupuassu; Seed; Size.; Cupuaçu; Germinação; Semente; Theobroma Grandiflorum.; Tamanho; Amazonia; Germination; Vigor.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383700

Quebra da dormência de sementes de pequi.
Provedor de dados: 14
Autores: PEREIRA, A. V.; PEREIRA, E. B. C.; SILVA, D. B. da; GOMES, A. C.; SOUSA-SILVA, J. C.
RESUMO: O objetivo deste trabalho foi avaliar os efeitos do tempo de imersão e da concentração de ácido giberélico na quebra de dormência das sementes de diferentes matrizes de pequi. Consistiu em dois experimentos conduzidos em safras distintas: no primeiro, os caroços oriundos da mistura de várias plantas foram submetidos à imersão por dois e quatro dias, em três concentrações de GA3 (0,500 e 1000 mg.dm³). O delineamento experimental foi inteiramente ao acaso, com oito repetições de 50 sementes por parcela, em esquema fatorial 3x2, mais a testemunha constituída de caroços não tratados. O segundo foi conduzido na safra seguinte, sendo os caroços colhidos e mantidos separados por planta-matriz (sete ao todo) e submetidos à imersão por dois e quatro dias em...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Fruta nativa; Indigenous organisms; Emergence; GA.; Ácido Giberélico; Caryocar Brasiliense; Cerrado; Emergência; Germinação; Pequi; Semente.; Germination; Fruits; Seeds.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569162

Germinação e vigor de sementes de Tabebuia cassinoides (Lam.) DC coletadas em diferentes caxetais do litoral paranaense.
Provedor de dados: 14
Autores: FOWLER, J. A. P.; CURCIO, G. R.; RACHWAL, M. F. G.; KUNIYOSHI, Y.
bitstream/CNPF-2009-09/16615/1/com_tec25.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Zona litorânea; Paraná; Propagação.; Espécie nativa; Germinação; Semente; Caixeta; Tabebuia Cassinoides.; Germination; Seeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/290869

Tratamentos químicos na emergência de sementes de guaraná.
Provedor de dados: 14
Autores: FRAZÃO, D. A. C.; FIGUEIRÊDO, F. J. C.; AZEVEDO, J. A.; CARVALHO, J. E. U. de.
bitstream/item/31924/1/CPATU-BP58.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Substancia quimica; Escarificacao quimica; Belem; Pará; Brasil; Chemistry substance; Scarification; Seed; Vigour.; Germinação; Guaraná; Paullinia Cupana; Plântula; Semente.; Amazonia; Germination; Vigor.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383018

Tamanho da semente de guaraná e sua influência na emergência e no vigor.
Provedor de dados: 14
Autores: FRAZÃO, D. A. C.; FIGUEIREDO, F. J. C.; CORREA, M. P. F.; OLIVEIRA, R. P. de; POPINIGIS, F.
bitstream/item/33547/1/CPATU-CirTec20.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Seed; Size; Quality; Vigour; Emergency.; Emergência; Fisiologia; Germinação; Guaraná; Paullinia Cupana; Semente; Qualidade; Tamanho.; Germination; Physiology; Vigor.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379478

Substratos e temperaturas para teste de germinação de sementes de aroeira-vermelha (Schinus terebinthifolius Raddi).
Provedor de dados: 14
Autores: MEDEIROS, A. C. de S.; ZANON, A.
bitstream/CNPF-2009-09/16622/1/com_tec32.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Substrato; Substrate; Propagação.; Aroeira; Espécie nativa; Semente; Germinação; Schinus Terebinthifolius; Temperatura.; Germination; Seeds; Temperature.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/290879

Efeitos de substratos e temperaturas na germinação de sementes de cuvitinga (Solanum-leprosum Dunal).
Provedor de dados: 14
Autores: FOWLER, J. A. P.; CARPANEZZI, A. A.
bitstream/CNPF-2009-09/16598/1/com_tec24.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Substrato; Cuvitinga; Solanum granuloso-leprosum; Substrate; Propagação.; Espécie nativa; Germinação; Semente; Temperatura.; Germination; Temperature.; Seeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/290850

Quebra da dormência da semente e enxertia em castanha-do-brasil.
Provedor de dados: 14
Autores: MÜLLER, C. H.
bitstream/item/57649/1/DOCUMENTOS-16-CPATU.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Castanha-do-brasil; Enxertia; Brasil; Brazil nut; Seed; Grafting.; Bertholletia Excelsa; Dormência; Germinação; Propagação Vegetativa; Semente.; Germination; Dormancy; Vegetative propagation.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381176

Cultura de embriões zigóticos de açaizeiro (Euterpe oleracea Mart.).
Provedor de dados: 14
Autores: LEMOS, O. F. de; ROCHA, F. V. N. da; LAMEIRA, O. A.; MENEZES, I. C. de.
bitstream/item/34354/1/ORIENTAL-BP23.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Belem; Pará; Brasil.; Açaí; Cultura In Vitro; Euterpe Oleracea; Germinação.; Amazonia; Germination; In vitro culture.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377876

Temperatura e luz na germinação de sementes de juta.
Provedor de dados: 14
Autores: FIGUEIREDO, F. J. C.; CARVALHO, J. E. U. de; OLIVEIRA, R. P. de; FRAZÃO, D. A. C.
bitstream/item/28802/1/CPATU-BP4.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivar roxa; Luz; Alenquer; Pará; Brasil; Seed; Variety.; Corchorus Capsularis; Germinação; Juta; Semente; Temperatura.; Amazonia; Germination; Jute; Light; Temperature.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375878

Emergência e vigor de sementes de guaraná submetidas a pré-tratamentos térmicos.
Provedor de dados: 14
Autores: FRAZÃO, D. A. C.; FIGUEIRÊDO, F. J. C.; CARVALHO, J. E. U. de; POPINIGIS, F.; OLIVEIRA, R. P. de.
bitstream/item/31894/1/CPATU-BP29.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Efeito; Seed; Emergency; Effect; Methyd bromide.; Brometo de Metila; Emergência; Germinação; Guaraná; Paullinia Cupana; Semente; Temperatura.; Germination; Temperature; Vigor.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380317

Cultivo in vitro de embriões zigóticos de macaúba.
Provedor de dados: 14
Autores: FOGAÇA, C. M.; ANDRADE, S. R. M. de; CARGNIN, A.; JUNQUEIRA, N. T. V.
bitstream/item/78137/1/p2009-030.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Palmeira; Cultura de tecidos; Palm.; Acrocomia Aculeata; Germinação; Macaúba.; Germination; Tissue culture.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/748443

Conservação de sementes de algodão sob condições tropicais úmidas.
Provedor de dados: 14
Autores: OHASHI, O. N. B.; CARVALHO, J. E. U. de; CORRÊA, J. R. V.; FIGUEIREDO, F. J. C.
bitstream/item/32027/1/CPATU-BP117.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Armazenagem; Acala del cerro; Santarem Novo; Capanema; Belem; Pará; Brasil; Seed; Conservation; Variety.; Algodão; Conservação; Gossypium Hirsutum; Germinação; Semente; Variedade.; Teor de Umidade; Amazonia; Germination; Cotton; Humidity; Storage.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381261

Produção de mudas de dendezeiro na Amazônia.
Provedor de dados: 14
Autores: BARCELOS, E.; RODRIGUES, M. do R. L.; SANTOS, J. de A. dos; CUNHA, R. N. V.
A fase de produção de mudas tem como objetivo a obtenção de plantas de alta qualidade agronômica e em condições para serem levadas ao campo na época mais apropriada, considerando o regime de chuvas na região.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Germinability; Planting stock; Plant production.; Dendê; Elaeis Guineensis; Germinação; Muda; Produção Vegetal; Poder Germinativo; Semente.; Germination; Seeds.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/670071

Resultados experimentais sobre germinação de sementes de açaizeiro (Euterpe oleracea Mart.)
Provedor de dados: 14
Autores: SANTOS, A. I. M. dos; CONDURU, J. M. P.; FERREIRA, R. M.
bitstream/item/152472/1/ComTec36.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Cabbage-palm; Fruit; Seed; Açaí; Euterpe Oleracea; Fruta; Germinação; Semente; Amazonia; Germination.
Ano: 1973
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376312

Germinação e vigor de sementes de juta armazenadas em diferentes embalagens.
Provedor de dados: 14
Autores: CARVALHO, J. E. U. de; FIGUEIREDO, F. J. C.
bitstream/item/33908/1/CPATU-CirTec40.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Armazenagem; Seed; Conservation; Vigour; Package.; Conservação; Corchorus Capsularis; Embalagem; Germinação; Juta; Semente.; Germination; Jute; Storage; Vigor.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381163

Características físicas e de germinação de sementes de espécies frutíferas nativas da Amazônia.
Provedor de dados: 14
Autores: CARVALHO, J. E. U. de; NASCIMENTO, W. M. O. do; MÜLLER, C. H.
bitstream/item/48879/1/Boletim-Pesquisa-203-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bacabinha; Camu-camu; Ginja; Guabiraba; Inga-Açu; Jacaiaca; Maracujá-do-mato; Muruci; Sapucaia; Taperebá; Umari; Belem; Pará; Brasil.; Açaí; Abiu; Araticum; Bacuri; Araçá; Árvore Frutífera; Biriba; Cupuaçu; Grumixama; Germinação; Graviola; Jenipapo; Peso; Semente; Pupunha; Sorva.; Amazonia; Fruit crops; Germination; Seeds; Weight.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376633

Estudos preliminares sobre a germinação de Passiflora nitida.
Provedor de dados: 14
Autores: ANDRADE, S. R. M. de; ROSA, S. D.; ARAÚJO, C. S. de; FALEIRO, F. G.; JUNQUEIRA, N. T. V.
bitstream/item/75851/1/bolpd-269.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Quebra de dormência; Maracujá suspiro; Maracujá silvestre; Passion fruit; Wild passiflora; Breaking dormancy.; Germinação.; Passiflora nitida; Germination; Seed dormancy.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/883255

Genipa americana L.
Provedor de dados: 14
Autores: JOKER, D.; SALOMAO, A. N.
bitstream/item/179035/1/genipa-americana-67-int.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Distribuição natural; Uso; Manipulação; Viabilidade; Genipa americana L; Natural distribution; Uses; Botanics; Fruit; Processing; Handling; Armazenamento; Botânica; Colheita; Dormência; Floração; Frutificação; Fruto; Germinação; Habitat; Processamento; Semeadura; Semente; Taxonomia; Dormancy; Flowering; Fruiting; Germination; Habitats; Harvesting; Seeds; Sowing; Storage; Taxonomy; Viability.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092807

Germinação de sementes de araticum (Annona montana Macfad.).
Provedor de dados: 14
Autores: QUEIROZ, J. A. L. de.
O objetivo do trabalho foi de avaliar métodos para acelerar a germinação de sementes de araticum, cujos experimentos foram conduzidos no Campo Experimental e de Produção de Mudas da Fazendinha.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Sementes; Tropical fruits.; Araticum; Fruta Tropical; Germinação.; Annona montana; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/345520

Avaliação de amostras de espécies do gênero Copaifera L. após armazenamento a - 20 °C por períodos de 11 a 25 anos.
Provedor de dados: 14
Autores: SALOMAO, A. N.; SANTOS, I. R. I.; JOSE, S. C. B. R.
Durante a conservação a -20 °C, sementes aleuro-lipídicas podem perder, gradativamente a germinabilidade e a viabilidade. Nesse trabalho, foi avaliado o efeito da exposição a -20 °C, por períodos que variaram de 11 a 25 anos, em sementes de 19 acessos de espécies do gênero Copaifera L., com teores de água de 5,6% a 10,5%. Após o congelamento, houve redução significativa (P&lt;0,05) na germinabilidade de três amostras e aumento significativo (P&lt;0,05) do percentual germinativo de uma amostra. Houve decréscimo, não significativo (P&lt;0,05), do potencial fisiológico em sementes de 11 amostras, após exposição a -20 °C, podendo ser, provavelmente, indício de deterioração do material. Em contraste, o armazenamento a -20 °C, acondicionando-se as sementes em...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Seed; Germinação; Conservação; Congelamento; Semente; Germination; Freezing.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125806

Emergência de plântulas de cupuaçuzeiro oriundas de sementes submetidas a estresses térmicos.
Provedor de dados: 14
Autores: FIGUEIRÊDO, F. J. C.; ROCHA NETO, O. G. da; CARVALHO, C. J. R. de.
bitstream/item/32812/1/CPATU-BP202.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Germinacao de semente; Efeito da temperatura; Efeito da umidade; Teobroma grandiflorum; Belem; Pará; Brasil; Plants; Emergence; Seed; Therapy.; Cupuaçu; Emergência; Plântula; Planta; Tratamento.; Amazonia; Germination; Humidity; Temperature.; Seedlings.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376727

Tolerância à seca em forrageiras tropicais - Aspectos agronômicos e microbiológicos.
Provedor de dados: 14
Autores: SOUTO, S. M.; ARONOVICH, S.
Gramíneas. Leguminosas; Método de seleção de plantas para a seca, através da germinação de sementes em solução de sacarose.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Tropical forage; Saccharose.; Forrageira Tropical; Germinação; Gramínea; Leguminosa; Semente.; Sacarose; Germination; Grasses; Legumes; Sucrose.; Seeds.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/624208

Variabilidade na germinação e dormência de sementes em populações de Centrosema pubescens Benth.
Provedor de dados: 14
Autores: CRUZ, E. D.; CARVALHO, J. E. U. de; OLIVEIRA, R. P. de.
bitstream/item/197905/1/FL02169.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Feed legumes; Pruduction; Centrosema; Dormência da Semente; Germinação; Leguminosa Forrageira; Produção; Dormancy; Germination; Seeds.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376265

Efeito da escarificação sobre a germinação de sementes de paricá (Schizolobium amazonicum) in vitro.
Provedor de dados: 14
Autores: LAMEIRA, O. A.; GOMES, A. P. do R.; LOPES, S. da C.; LEÃO, N. V. M.
bitstream/item/39906/1/Com-Tec-21-Am-Oriental.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Belterra; Pará; Brasil.; Essência Florestal; Germinação; Paricá; Semente.; Schizolobium Amazonicum; Amazonia; Forest trees; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377937

Dormência em sementes florestais.
Provedor de dados: 14
Autores: FOWLER, J. A. P.; BIANCHETTI, A.
Categorias de dormencia; dormencia tegumentar ou exogena, dormencia embrionaria ou endogena; Causas da dormencia; Metodos para a superacao da dormencia; Dormencia combinada
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Forest; Propagação; Semente; Dormência; Floresta; Germinação; Dormancy; Germination; Seed trees.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/290718

Potencial alelopático e controle de plantas invasoras por leguminosas herbáceas perenes consorciadas com bananeira.
Provedor de dados: 14
Autores: ESPÍNDOLA, J. A. A.; OLIVEIRA, S. J. C. R. de; CARVALHO, G. J. A. de; SOUZA, C. L. M. de; PERIN, A.; GUERRA, J. G. M.; TEIXEIRA, M. G.
Potencial alelopático de leguminosas herbáceas perenes sobre a germinação de sementes. Avaliação fitossocial na área de consórcio de leguminosas herbáceas perenes com bananeira.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Fazendinha agroecológica; SIPA.; Alelopatia; Banana; Germinação; Legume; Leguminosa; Semente.; Allelopathy; Bananas; Germination; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/624173

Germinação de sementes de espécies amazônicas: araracanga (Aspidosperma desmanthum Benth. ex Müll.Arg.).
Provedor de dados: 14
Autores: CRUZ, E. D.
bitstream/item/178958/1/COM.TEC-299-Ainfo.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Germinação de semente; Germinação; Semente Florestal; Biometria; Seed germination; Biometry; Germination.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092755

Efeito de tratamento fungicida e de tratamento fungicida + ácido giberélico sobre a germinação de sementes de pequizeiro.
Provedor de dados: 14
Autores: OLIVEIRA, S. S.; FAVORITO, O.; DOMBROSKI, J. L. D.; GUIMARÃES, S. C.; COELHO, M. de F. B.
bitstream/CPAC-2009/25297/1/p2004_22.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Indigenous organisms.; Caryocar Brasiliense; Cerrado; Espécie Nativa; Fungicida; Fungo; Germinação; Pequi; Propagação Vegetativa; Semente.; Fungi; Fungicides; Germination; Plant propagation; Seeds.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568297

Germinação de sementes de graviola (Annona muricata L.) no Estado do Amapá.
Provedor de dados: 14
Autores: QUEIROZ, J. A. L. de.
Com o objetivo de avaliar metodos para superar a dormencia de sementes de graviola para acelerar e uniformizar o processo de germinação, foi conduzido um experimento no Campo experimental de Produção de Mudas da Fazendinha, da Embrapa Amapá, durante os meses de maio e junho de 1999.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Annona Muricata; Germinação; Graviola; Semente.; Germination; Seeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/344120

Contribuição ao estudo do guaraná.
Provedor de dados: 14
Autores: NAZARÉ, R. F. R. de; FIGUEIREDO, F. J. C.
bitstream/item/55262/1/CPATU-DOC-4-.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Origem; Valor terapeutico; Uso; Formação; Origin; Therapeutic value; Use; Seed; Genetic; Cultting; Formation; Disease; Pest; Economy.; Composição Química; Economia; Doença; Guaraná; Genética; Germinação; Muda; Paullinia Cupana; Praga; Semente; Tecnologia.; Germination; Chemical composition; Technology.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382454

Efeito do acondicionamento sobre a germinacao de sementes de seringueira (Hevea spp).
Provedor de dados: 14
Autores: PEREIRA, J. da P.; PEREIRA, A. V.; CONCEICAO, H. E. O.; CELESTINO FILHO, P.; TRINDADE, D. R.
Trabalho experimental conduzido no CNPSe mostrou a viabilidade de conservacao do poder germinativo das sementes de seringueira em 60% e 70%, ate aos tres meses apos a coleta, sem a utilizacao de qualquer fungicida, quando acondicionadas em sacos de plastico e estocadas em tapiri coberto e tapado lateralmente com palha.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Armazenagem; Brasil; Amazonas; Rubber tree; Species.; Conservação; Espécie; Germinação; Hevea; Semente; Seringueira.; Germination; Storage.; Seeds.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665379

Germinação e dormência de sementes de Tridax procumbens L.
Provedor de dados: 14
Autores: IKEDA, F. S.; CARMONA, R.; MITJA, D.; GOMES, A. C.; GUIMARÃES, R. M.
bitstream/CPAC-2009/27662/1/p2006_02.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Planta daninha; Planta invasora.; Dormência da Semente; Germinação.; Tridax procumbens; Germination; Dormancy; Plant propagation; Weeds.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570140

Temperatura de germinação para sementes de malva (Urena lobata L.).
Provedor de dados: 14
Autores: FIGUEIRÊDO, F. J. C.; POPINIGIS, F.
bitstream/item/57748/1/CPATU-ComTec14.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Teste; Mallow; Seed; Test.; Germinação; Malva; Semente; Urena Lobata.; Temperatura; Germination; Temperature.
Ano: 1978
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376650

Screening of soybean cultivars for chloride tolerance in Argentina
Provedor de dados: 46
Autores: Lúquez,J.E; Briguglio,M.A; Irigoyen,F; Eyherabide,G.A.
Soybean Glycine max [L. (Merrill)] is the most important crop in Argentina, where soil salinization is increasing. Development of salt tolerant cultivars is an effective approach to expand the crop area and minimize yield loss in saline soils. The aim of this work was to screen commercial soybean cultivars for chloride tolerance in three experiments. In the first experiment 37 cultivars were placed in paper rolls wetted with 50 mM NaCl. Germination speed and hypocotyl and radicle length were registered. Twelve cultivars were chloride tolerant as suggested by their hypocotyl and radicle length. In the second experiment, seven cultivars were grown under greenhouse conditions in containers with sandy soil, nutrients and 50 mM NaCl solution. Leaf scorch (LS)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soybean; Chloride tolerance; Germination; Screening; Variability; Glycine max [L. (Merrill)].
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332015000300005

Effect of constant and cyclical temperatures on the mortality of Triatoma infestans (Klug) (Hemiptera: Reduviidae) treated with Beauvaria bassiana (Bals.) Vuill. (Hyphomycetes)
Provedor de dados: 82
Autores: Lecuona,Roberto E.; Rodriguez,Juana; La Rossa,Francisco R.
The mortality of Triatoma infestans (Klug) treated with Beauvaria bassiana (Bals.) Vuill. under several temperature regimes was analyzed. Mortality rates were highest at 26ºC and 22ºC and lowest at constant 34ºC. The combinations 26/34ºC or 34/26ºC (12:12h cycles) were significantly different from the combinations 18/26ºC and 26/18ºC, showing that high temperatures (34ºC) affect mortality most significantly. The combinations also indicate that when an extreme high temperature is associated with an optimal temperature of 26ºC, the susceptibility of T. infestans to B. bassiana infection decreases. Exposure to extreme temperature (18ºC or 34ºC) associated with an optimal temperature of 26ºC in 8:8:8h cycles, reduces the mortality of T. infestans. In cycles of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fluctuating regime; Germination; Entomapathogenic fungus.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000400019

Tecnologia para o Manejo Adequado de Sementes de Farinha-seca
Provedor de dados: 190
Autores: Fowler, João Antonio Pereira; Carpanezzi, Antonio Aparecido; Zuffellato-Ribas, Katia Christina.
A farinha-seca (Albizia hassleri (CHODAT) BUKART) é uma espécie nativa da floresta estacional. Além de ser fixadora de nitrogênio atmosférico, apresenta potencial de uso ornamental, em reflorestamentos ambientais e na arborização de culturas e pastagens. Pode atingir 35 m de altura e diâmetro na altura do peito de 80 cm. O trabalho objetivou definir o número de sementes por quilograma, o método para superar a dormência, o substrato e a temperatura para germinação das sementes em laboratório, o ambiente e embalagem para a conservação das sementes por 12 meses. O experimento para superação da dormência das sementes constou de 16 tratamentos, o de substrato e temperatura de 12, ambos em delineamento inteiramente casualizado. O experimento de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dormência; Germinação; Conservação; Albizia niopoides; Armazenamento. Dormancy; Germination; Conservation; Albizia niopoides; Storage.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/211

Morfologia do fruto, das sementes e dos estádios iniciais de desenvolvimento de Helicostylis tomentosa
Provedor de dados: 190
Autores: Arruda, Yêda Maria Boaventura Corrêa; Ferraz, Isolde Dorothea Kossmann; Mendes, Angela Maria da Silva.
Os objetivos deste estudo foram analisar as características morfológicas complexas dos frutos e diásporos de inharé, e fornecer subsídios para o reconhecimento da planta na fase inicial do desenvolvimento. As infrutescências apresentam, em média, 2,2 cm x 2,9 cm x 2,6 cm, com 4-10 frutos inseridos ao perianto carnoso. Os frutos, drupas monospérmicas, apresentam um pericarpo fino-gelatinoso, que contem um pirênio globoso, levemente achatado, marrom opaco e liso medindo 0,9 cm x 0,8 cm x 0,6 cm. A semente exalbuminosa possui tegumento membranoso; o embrião é axial total e as reservas encontram-se nos cotilédones crassos e isófilos. A germinação é tipo hipógea criptocotiledonar; com a retirada do endocarpo, a protrusão da raiz primária ocorre após 10 dias da...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos floretais; Botânica Plântulas; Germinação; Desenvolvimento da planta Seedlings; Germination; Plant development.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1439

Variation on embryo development of Ilex paraguariensis Seeds
Provedor de dados: 190
Autores: Fowler, João Antonio Pereira; Sturion, José Alfredo; Zuffellato-Ribas, Katia Christina.
Ilex paraguariensis St.Hil., popularly named erva-mate in Brazil, is an indigenous species of the Araucaria Forest with a large geographic distribution and a high social and economic importance. The seeds of this species exhibits physiologic and seed coat  impermeability dormancies and needs stratification on sand in order to break them. This work aimed to evaluate the influence of genotype -environment interaction on embryo development of erva-mate seeds formed under different environmental conditions. The fruits were collected in Cascavel, Toledo and Campo Mourão, State of Paraná, and in Soledade, State of Rio Grande do Sul, in February 2003. The experiment was carried out on Forest Seed Laboratory of Embrapa Florestas, in a completely randomized design...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ilex paraguariensis; Embryo; Germination; Dormancy. Embrião; Germinação; Dormência; Erva-mate.
Ano: 2010
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/134

Floristic composition and distribution of soil seed bank in Subtropical Ombrophilous Alluvial Forest in Araucaria, Parana State, Brazil
Provedor de dados: 190
Autores: Silva-Weber, Ariadne Josiane Castoldi; Nogueira, Antonio Carlos; Carpanezzi, Antonio Aparecido; Galvão, Franklin; Weber, Saulo Henrique.
In this research it was evaluated the potential of the soil seed bank in a remaining of Subtropical Ombrophilous Alluvial Forest (Araucaria Forest), by quali-quantitative analysis of seed germination. Additionally it was tested the occurrence of seasonal variation of the soil seed bank. The forest remaining located in Araucaria county, Parana State, Brazil, and it is influenced by Barigui river, affluent of Iguaçu river. It was used the completely randomized experimental design with ten replications. The soil seed bank was collected in three seasons at depth (of 10 cm plus litter), using a 0.40 m x 0.40 m sample square. The collected samples were placed in wood boxes in greenhouse, during 8 months. It was observed a season average of 5,732 individuals m-2,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Sazonality; Barigui river Germinação; Sazonalidade; Rio Barigui.
Ano: 2012
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/321

Superação da dormência de sementes de jatobá
Provedor de dados: 190
Autores: Freitas, Allan Rocha; Lopes, José Carlos; Matheus, Miele Tallon; Mengarda, Liana Hilda Golin; Venancio, Luan Peroni; Caldeira, Marcos Vinicius Winckler.
Devido às dificuldades para obtenção de sementes de boa qualidade fisiológica e de técnicas ideais para a reprodução seminífera, este estudo teve por objetivo avaliar a eficiência da escarificação na superação da dormência de sementes de jatobá (Hymenaea oblongifolia e Hymenaea courbaril var. stilbocarpa). O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições de 25 sementes. Os tratamentos adotados foram: sementes intactas (controle); escarificação mecânica com lixa d’água nº 100, do lado oposto ao embrião; e tratamento de escarificação com ácido sulfúrico (H2SO4) concentrado durante 30; 60; 90 e 120 minutos. A escarificação mecânica e escarificação química durante 30 e 60 minutos constituíram-se em tratamentos...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos Florestais Espécie nativa; Vigor; Germinação; Dormência Native species; Vigour; Germination; Dormancy.
Ano: 2013
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/350

Adjustment methodology of the tetrazolium test for viability evaluation of angico seeds
Provedor de dados: 190
Autores: Pinho, Daniel Santos; Borges, Eduardo Euclydes de Lima; Carvalho, Ana Paula Vilela; Corte, Viviana Borges.
Este trabalho teve por objetivo adequar a metodologia do teste em sementes de Anadenanthera peregrina (L.) Speg. As sementes foram pré-condicionadas por imersão em água destilada a 25 ºC por 14 horas. O tegumento foi retirado e os embriões submersos em solução de tetrazólio (pH 6,5) nas concentrações de 0,1%; 0,05% e 0,01%, sendo mantidos no escuro a 25 ºC por três e cinco horas e a 30 ºC por 24 horas. Avaliaram-se a intensidade e localização da coloração, presença de áreas leitosas e aspecto dos tecidos. Os embriões foram classificados em nove classes de viabilidade. O melhor tratamento como substituto do teste padrão de germinação foi a concentração de 0,1% e a incubação a 30 ºC por 24 horas. Sementes viáveis de A. peregrina foram classificadas nas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological quality; Germination; Anadenanthera peregrina Qualidade; Fisiológica Germinação; Anadenanthera peregrina.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/197

Weight is a key factor in the physiological quality of Parapiptadenia rigida seeds
Provedor de dados: 190
Autores: Saldanha, Cleber Witt; Missio, Evandro Luiz; Steffen, Gerusa Pauli Kist; Maldaner, Joseila; Morais, Rosana Matos de.
This study aimed to assess the physiological quality of Parapiptadenia rigida (Benth.) Brenan seed weight classes subjected to accelerated aging under laboratory and greenhouse conditions. A lot of P. rigida seeds was split in three seed weight classes (thousand seed weight): TSW1 (original lot; control, 19.23 g), TSW2 (25.45 g) and TSW3 (13.58 g), which were subjected to three accelerated aging times (0, 24 and 48 h). First count, weak and strong normal seedlings, percentage of accumulated germination, percentage of death seed, electrical conductivity, fresh and dry weight and shoot length were assessed in laboratory. Seedling emergence, emergence velocity and emergence velocity index were assessed in greenhouse. P. rigida seeds showing higher weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos Floestais; Sementes Florestais Accelerated aging; Germination; Seed size Envelhecimento acelerado; Germinação; Tamanho de semente.
Ano: 2018
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1501

Ecological aspects of Byrsonima intermedia in riparian microenvironments
Provedor de dados: 190
Autores: Magalhães, Allan Freitas; Carvalho, Dulcinéia de; Silva Júnior, Jessé Marques da; Guimarães, João Carlos Costa.
This work aimed to better understand the ecology of Byrsonima intermedia A. Juss. and the mechanisms for initial establishment of this species in riparian microenvironments. The study was conducted at Peti Environmental Station - PETI (19o53'34.1"; 43o21'52.6"), São Gonçalo do Rio Abaixo, Minas Gerais State, Brazil. The ecological parameters studied were: moisture at dispersion (fruit, seed and diaspore) and after dispersion (imbibition; initial growth and development). Diaspores and seeds present different behaviors. The faster water absorption process was in seeds without endocarp. The total growth length from embryo until seedling was 21 days. Seedlings establishes preferentially in flooded environments.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diaspore; Imbibition; Germination; Flooding; Seedling. Recursos Florestais; Engenharia Florestal; Botânica; Diásporo; Embebição; Germinação; Inundação; Plântula.
Ano: 2013
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/463

Biometria e armazenamento de sementes de genótipos de cacaueiro
Provedor de dados: 190
Autores: Venial, Lucimara Ribeiro; Alexandre, Rodrigo Sobreira; Camata, Henrique; Lopes, José Carlos; Zanotti, Rafael Fonsêca; Ferreira, Adésio; Aguilar, Marco Antonio Galeas.
Genótipos de Theobroma cacao L. devem ser melhor estudados, para se identificar aqueles que produzem sementes mais desenvolvidas e viáveis após o armazenamento. Objetivou-se com este trabalho estudar a biometria e dois tempos de armazenamento de sementes de genótipos de cacaueiro. A biometria foi avaliada em oito genótipos de cacaueiro (tratamentos). Foram instalados testes de germinação em delineamento inteiramente ao acaso, no esquema fatorial 8 x 2 (genótipos: CCN51, PH16, CEPEC2002, Ipiranga, SJ02, PS1319, TSH1188 e Comum x dois períodos de armazenamento: 0 e dois dias). O genótipo TSH1188 apresentou maior comprimento, relação comprimento/largura, espessura e massa de 100 sementes. A absorção de água das sementes recém-colhidas dos genótipos é lenta,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos Florestais; Engenharia Florestal; Sementes Florestais Theobroma cacao L.; Material genético; Germinação Theobroma cacao L.; Genetic material; Germination.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1239

Physiological and sanitary quality of seeds of açoita-cavalo (Luehea divaricata)
Provedor de dados: 190
Autores: Maciel, Caciara Gonzatto; Souza, Letiele Bruck de; Bovolini, Marciéli Pitorini; Brum, Daniele Lemos; Brião Muniz, Marlove Fátima; Buriol, Galileu Adeli.
The objective of this study is to characterize two lots of Luehea divaricate seeds, as its physiological and sanitary quality. Seeds were collected in the municipalities of Santa Maria (SM) and Restinga Seca (RES), located inthe central region of Rio Grande do Sul State, Brazil. Germination tests and fungi transmission were conducted in commercial substrate Carolina Soil®. The variables determined were germination indices (GI), emergency (%), symptomatic seedlings (%) and dead seeds (%).The fungi were detected using PDA test and substrate filter paper (PF). For each test it was used four replicates of 25 seeds. It has been also determined the sanity of the fruits using blotter test. The GI and percentage of emergence varied between 6.7 and 8.7 and 51 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Forest seeds; Seed pathology Proteção Florestal Germinação; Sementes florestais; Patologia de sementes.
Ano: 2013
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/457

Agrochemicals and storage times on soybean seed vigor
Provedor de dados: 86
Autores: Bortoletto,Wilian Vinicius; Macedo,Willian Rodrigues; Oliveira,Thalyta Coelho de; Souza,Daniela Silva.
Abstract: The objective of this work was to investigate the potential physiological damage of the treatment of '97Y07RR' soybean seeds with different pesticides at different storage times, in order to define the optimal period of sowing. The germination rate, the germination speed index, and shoot fresh matter were evaluated. Thiamethoxam did not cause losses in seed vigor with increasing storage time; however, the other agrochemicals caused significant losses. Seed treatment should be performed up to 90 days before sowing.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Germination; Germination speed index; Physiological quality; Seed treatment.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000200129

Tetrazolium test for Pinus taeda: preparation, staining, and seed viability classes
Provedor de dados: 86
Autores: Santos,Felipe Serrato dos; Vieira,Elisa Serra Negra; Panobianco,Maristela.
Abstract: The objective of this work was to evaluate preparation and staining methods used in the tetrazolium test for Pinus taeda seeds, with the definition of viability classes. The procedures carried out were those described in the rules for seed testing in Brazil and Association of Official Seed Analysts, as well as an alternative method for the tetrazolium test. For each procedure, different combinations of types of seed cuts, concentrations of tetrazolium salt, and exposure periods were used. The test conducted with the alternative procedure (longitudinal cut adjacent to the embryo and staining of only the half with the embryo) is the most practical. The obtained results allowed classifying seeds into two different viability classes (viable and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Pinaceae; Physiological quality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104000

Desiccation, postharvest maturity and seed aging of tall oat-grass
Provedor de dados: 86
Autores: Stanisavljević,Rade; Djokić,Dragoslav; Milenković,Jasmina; Terzić,Dragan; Djukanović,Lana; Stevović,Vladeta; Dodig,Dejan.
The objectives of this work were to determine whether and at which seed physiological maturity stage the diquat desiccant affects the tall oat-grass (Arrhenatherum elatius) seed quality and yield, as well as the proper storage period between harvest and sowing. Diquat desiccation was evaluated in applications during milk or dough seed maturation stages. Seeds conventionally produced and stored under traditional storage conditions were used for the analyses. Seed samples were drawn every 30th day after harvest (DAH). After the 240th DAH, samples were drawn every 90th day up the to 690th DAH. The highest yield were obtained by desiccation applied at the beginning of the seed dough stage, with a satisfactory seed quality. Both final germination and seedling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arrhenatherum elatius; Germination; Seed dormancy.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001100010

Germination and development of pecan cultivar seedlings by seed stratification
Provedor de dados: 86
Autores: Poletto,Igor; Muniz,Marlove Fátima Brião; Poletto,Tales; Stefenon,Valdir Marcos; Baggiotto,Carine; Ceconi,Denise Ester.
Abstract: The objective of this work was to evaluate the effect of seed stratification on germination rate, germination speed, and initial development of seedlings of six pecan (Carya illinoinensis) cultivars under subtropical climatic conditions in southern Brazil. For stratification, the seeds were placed in boxes with moist sand, in a cold chamber at 4°C, for 90 days. In the fourteenth week after sowing, the emergence speed index, total emergence, plant height, stem diameter, and number of leaves were evaluated. Seed stratification significantly improves the germination potential and morphological traits of the evaluated cultivars.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carya illinoinensis; Dormancy break; Germination; Rootstock; Seedling quality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015001201232

Light and temperature effects on seed germination of four native species of Mediterranean high mountains(Spain)
Provedor de dados: 85
Autores: Serrano-Bernardo,F; Rosúa,JL; Díaz-Miguel,M.
The Mediterranean region is considered one of the most important zones worldwide in terms of plant diversity. Sierra Nevada (S Spain) is a unique mountain massif within the high-mountain systems of the Mediterranean. It is of great floristic importance and very rich in endemic species. However, it requires numerous tasks for restoring plant cover due to the constant anthropic degradation, especially because of the ski station located near the second-highest peak of the mountain. One of the restoration efforts consists of trying to reproduce, in the laboratory, the ideal conditions to pre-germinate seeds of some of the species most threatened by these perturbations. This is to transplant the seedlings afterwards in the mountain, thereby contributing to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Plant-cover restoration; Mediterranean high mountains; Sierra Nevada; Light; Temperature.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100003

Seed germination after freezing in high-mountain plant species: Implications for ski-run restoration
Provedor de dados: 85
Autores: Díaz-Miguel,M; Castro,J; García,PA.
The construction of a ski slope implies a strong environmental impact as a result of the removal of the vegetation cover. The need to protect the soil requires a rapid restoration of vegetation, which is often done with commercial seed mixtures that can cause a negative impact on these high mountain ecosystems. Thus, the use of seeds of native species is essential, especially in areas rich in endemic species. The compaction of snow as a result of the preparation of the ski slopes causes the soil to freeze. This hinders the germination of seeds, especially those of shrub species. This paper analyzes, under laboratory conditions, how freezing and phytohormone application affect the seed germination of three endemic shrubby species used in the restoration of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; High-mountain plant species; Plantgrowth regulators; Ski-slope restoration; Soil freezing.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200026

Effect of cold storage, heat, smoke and charcoal on breaking seed dormancy of Arctostaphylos pungens HBK (Ericaceae)
Provedor de dados: 85
Autores: Jurado,E; Márquez-Linares,M; Flores,J.
We evaluated the effect of cold storage and fire-related cues on seed germination of Arctostaphylos pungens HBK (Mexican Manzanita), a common shrub in poorly managed pine-oak forests in Durango, Mexico. Because this shrub has a high density in previously burnt forests, we investigated the effect that high temperatures, smoke and charcoal might have on seed germination of this species. Seeds were collected fresh from the shrubs. The highest germination was 30% for seeds that had been cold stored, heat shocked, past through smoke and watered with diluted charcoal.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed ecology; Germination.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572011000100015

Seed germination after fire: a study with a plant inhabiting non-fire-prone areas
Provedor de dados: 85
Autores: Menezes,LCCR de; Rossi,MN.
After a fire event, germination of seeds with hard coats can be enhanced. In the present study, we investigated whether germination of Mimosa bimucronata (DC.) Kuntze (Fabaceae) seeds, which present hard coats, is increased after fire, even though these trees usually occur in damp areas, where fire is a transient event. Fire events were manipulated in trays filled with soil covered with different amounts of dry grasses, characterizing three treatments: a) 0g (control group); b) 300g, and c) 450g of dry grass. Burning treatments were applied to seeds positioned either on the soil surface or buried in the soil. Germination experiments were carried out at 0-h and 24-h after fire to obtain the germination percentage and the Germination Speed Index (GSI). For...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Hard seed coat; High temperatures; Fabaceae.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572011000200006

Longevity of Horseweed Seed Bank Depending on the Burial Depth
Provedor de dados: 87
Autores: VARGAS,A.A.M.; AGOSTINETTO,D.; ZANDONÁ,R.R.; FRAGA,D.S.; AVILA NETO,R.C.
ABSTRACT: Horseweed (Conyza spp.) is considered as one of the major weeds occurring in the agricultural areas of South America, especially in Brazil. This species stands out from the other weeds due to characteristics such as large seed production, continued seed production, dispersion over long distances and resistance to 5-enolpyruvoylshikimate 3-phosphate (EPSP) and acetolactate synthase (ALS) inhibiting herbicides, features that increase their management. Therefore, this study aimed at determining the physiological quality and longevity of horseweed seeds over 12 months. The experiment was established under field conditions, using a randomized block design with four replications. Fifty horseweed seeds were distributed into 50 g of dry soil, placed in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conyza spp.; Survival; Dormancy; Germination; Viability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100249

AUTOTOXICITY IN TOUGH LOVEGRASS ( Eragrostis plana )
Provedor de dados: 87
Autores: FAVARETTO,A.; SCHEFFER-BASSO,S.M.; PEREZ,N.B.
ABSTRACT Autotoxicity in tough lovegrass has been analyzed in the field, but has never been tested in allelopathy bioassays. Therefore, this study aimed to verify and compare the autotoxicity of leaves and roots from aqueous extracts of tough lovegrass on its germination and early seedling growth. Extracts of green leaves (GL), senescent leaves (SL), and roots (R) at concentrations of 0.05, 0.15, and 0.25 g mL-1 were analyzed on how they affected seed germination and seedling growth. The extracts, regardless of the source or concentration of the material used, have significantly reduced germination percentage, index of germination speed, and root growth of seedlings of tough lovegrass. Effects on mean germination time and shoot length varied according to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Aqueous extracts; Eragrostis plana; Germination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100241

ALLELOPATHIC EFFECT OF LEGUMINOUS WEEDS ON RATE, SYNCHRONIZATION AND TIME OF GERMINATION, AND BIOMASS PARTITIONING IN RICE
Provedor de dados: 87
Autores: ZOHAIB,A.; ANJUM,S.A.; JABBAR,A.; TABASSUM,T.; ABBAS,T.; NAZIR,U.
ABSTRACT The present study was aimed at determining the allelopathic influence of water extracts at varying concentrations (2.5% and 5% w/v) and residues with varying decomposition periods (0, 15 and 30 days) at 2% (w/w) concentration of four weeds (Trigonella polycerata, Vicia sativa, Lathyrus aphaca, Medicago polymorpha) against rate, synchronization and time of germination, and biomass partitioning of rice through plant and soil bioassays. Germination and biomass partitioning in rice plants were inhibited by extracts and residues. The maximum decrease in energy of germination (88.6%) and increase in time for 50% germination (210.4%) were caused by the L. aphaca extract at 5% concentration as compared to control. Root and shoot, fresh weight (13.6 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Leguminous weeds; Rice; Germination; Biomass partitioning.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100269

INFLUENCE OF SUGARCANE STRAW AND SOWING DEPTH ON THE EMERGENCE OF WEED SPECIES
Provedor de dados: 87
Autores: SILVA,P. V.; MONQUERO,P. A.; SILVA,F. B.; BEVILAQUA,N. C.; MALARDO,M. R.
ABSTRACT This study aimed to understand the influence of sowing depth and the amount of sugarcane straw on the emergence of weed species Luffa aegyptiaca Miller (Cucurbitaceae); Mucuna aterrima Piper &amp; Tracy (Fabaceae - Leguminosae) and Ricinus communis (Euphorbiaceae). A completely randomized design with a 5 x 4 x 3 factorial layout with four replications was used, at five sowing depths (0, 2, 4, 8 and 10 cm), four different amounts of sugarcane straw (0, 5, 10 and 15 t ha-1) and three different evaluation periods (7, 14 and 21 days after sowing). After sowing, different amounts of sugarcane straw (0, 5, 10 and 15 t ha-1) were deposited on soil. Seedling emergence was analyzed at 7, 14 and 21 days after sowing, counting the number of seedlings that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; No-burn sugarcane; Mechanized harvesting.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300405

Comparison of Sensitivity to Glyphosate of Euphorbia davidii Populations
Provedor de dados: 87
Autores: NÚÑEZ FRÉ,F.R.; JUAN,V.F.; YANNICCARI,M.; SAINT ANDRÉ,H.M.; FERNANDEZ,R.R.
ABSTRACT: Euphorbia davidii (Euphorbiaceae) is a summer annual weed present in the Province of Buenos Aires, Argentina. The aim of this study was to compare the sensitivity to glyphosate of different populations of Euphorbia davidii. Two techniques were used: a seed bioassay and shikimate determination in glyphosate-treated plants. Germination rates of seeds belonging to the populations from Espartillar, Barrow, Olavarria and Azul exposed to different concentrations of glyphosate were compared. Plants from the same locations treated with glyphosate were evaluated to determine shikimate levels. The most sensitive population was from Espartillar, with a CE50 (average effective concentration) of 4.00 g e.a. L-1. Based on this finding, the resistance index for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide resistance; Germination; Bioassay; Shikimate; EUDA5.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100209

Allelopathic Influence of Sorghum Aqueous Extracts and Sorghum Powder on Germination Indices and Seedling Vigor of Hybrid Corn and Jungle Rice
Provedor de dados: 87
Autores: YAR,S.; KHAN,E.A.; HUSSAIN,I.; RAZA,B.; ABBAS,M.S.; MUNAZZA,Z.
ABSTRACT: Allelopathy has become a paramount tool for controlling weeds in crop plants without deteriorating the environment. Allelopathic effects of sorghum aqueous extracts and sorghum powder on a single cross maize (Zea mays L.) hybrid “HC-8080” and a summer weed, jungle rice (Echinochloa colona L.) were assessed in the research laboratory of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, KPK, Pakistan. The treatments included: T1: control (untreated check), T2: sorghum aqueous extract at a rate of 5 mL kg-1 soil, T3: sorghum aqueous extract at a rate of 10 mL kg-1 soil, T4: sorghum aqueous extract at a rate of 15 mL kg-1 soil, T5: sorghum powder at a rate of 5 g kg-1 soil, T6: sorghum powder at a rate of 10 g kg-1 soil and T7:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum allelopathy; Germination; Growth; Maize.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100205

Water Stress in the Production and Quality of Bidens pilosa and Raphanus raphanistrum Seeds
Provedor de dados: 87
Autores: PEREIRA,M.R.R.; MARTINS,C.C.; SILVA JR.,A.C.; MARTINS,D.
ABSTRACT: Plants in soils with low water availability may present a reduction of their leaf area and photosynthetic rate, as well as lower assimilated compound supply for seeds. Knowing the physiological quality and seed production of weeds generated under water deficit conditions can help understanding the survival and competition strategies of species. The objective of this work was to evaluate the effect of water stress on the production and germination of Bidens pilosa and Raphanus raphanistrum seeds. Plants were maintained in soils with different water potentials (-0.03, -0.07 and -1.5 MPa) throughout their cycle, until seed production, when they were harvested. Then, evaluations were performed to find out the number of seeds per plant and number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Vigor; Water availability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100305

SEED DORMANCY BREAKING TREATMENTS FORAFRICAN PURSLANE (Zaleya pentandra)
Provedor de dados: 87
Autores: MUNAWAR,S.; NAEEM,M.; ALI,H.H.; JAMIL,M.; IQBAL,M.; NAZIR,M.Q.; BALAL,R.M.; SAFDAR,M.E.
ABSTRACT Understanding the mechanisms involved in releasing seed dormancy is crucial for effective plant management and renewal of species in the arid zone. Zaleya pentandra is an emerging invasive weed of the arid areas of Pakistan. We investigated the effects of different dormancy breaking treatments on the germination of Z. pentandra seeds. Seeds were treated with hot water (by placing them in boiling water for 5, 15, 30, 60, 90, 120, and 150 min), dry heat (by placing them in a preheated oven at 70 oC for 1, 2, and 4 hours; at 70 oC for 1, 2, 3, and 4 days, and at 200 oC for 5, 10, 15, 30, and 45 min) and stratification (by placing them at 2-5 ºC in a refrigerator for 5, 10, 30, and 60 min; for 3, 6, and 12 hours, and for 1, 2, 4, 8, 15, and 30 days)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Scarification; Stratification; Dry heat; Thiourea; Arid zone.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400623

Influence of environmental factors on seed germination and seedling emergence of yellow sweet clover (Melilotus officinalis)
Provedor de dados: 87
Autores: Ghaderi-Far,F; Gherekhloo,J.; Alimagham,M.
Laboratory and greenhouse experiments were conducted to determine the effects of drought and salinity stress, temperature, pH and planting depth on yellow sweet clover (Melilotus officinalis) germination and emergence. Base, optimum and ceiling germination temperatures were estimated as 0, 18.47 and 34.60 ºC, respectively. Seed germination was sensitive to drought stress and completely inhibited at a potential of -1 MPa, but it was tolerant to salinity. Salinity stress up to 90 mM had no effect over the M. officinalis seed germination, but the germination decreased by increasing the salt concentration. The drought and salinity required for 50% inhibition of maximum germination were 207 mM and -0.49 MPa, respectively. High percentage of seed germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; PH; Salinity stress; Soil depth; Temperature; Water stress.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000300002

Leaf and Root Allelopathic Potential of the Vernonanthura brasiliana
Provedor de dados: 87
Autores: NISHIMUTA,H.A.; ROSSI,A.A.B.; YAMASHITA,O.M.; PENA,G.F.; SANTOS,P.H.A.D.; GIUSTINA,L.D.; ROSSI,F.S.
ABSTRACT: The Brazilian native weed assa-peixe (Vernonanthura brasiliana) is considered one of the main invasive plant species of pasture areas in the Amazon. It is thus necessary to know their biology and their behavior in the environment, and to enhance the development of management strategies, minimizing the use of herbicides. The objective of this study was to test the allelopathic effect on the germination and growth of the bioindicator species Lactuca sativa from leaf and root extracts obtained from fresh and dry V. brasiliana. The experiment consisted of six treatments with concentrations of 0, 12.5, 25, 50, 100, and 200 mg mL-1, using four replicates per treatment. The evaluated parameters were: germination percentage, first count, germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Assa-peixe; Lactuca sativa L.; Allelopathy; Germination.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100161

Allelopathic Effect of Some Associated Weeds of Wheat on Germinability and Biomass Production of Wheat Seedlings
Provedor de dados: 87
Autores: ZOHAIB,A.; TABASSUM,T.; ANJUM,S.A.; ABBAS,T.; NAZIR,U.
ABSTRACT: Weeds associated with crops may impose their phytotoxic effects on crop plants through the release of their allelochemicals and hence seriously reduce crop productivity. The present study was conducted to investigate the allelopathic effect of water soluble phenolics of weeds associated with wheat crop (Vicia sativa, Trigonella polycerata, Lathyrus aphaca, Medicago polymorpha, Melilotus indica) on germinability and biomass production of wheat seedlings by using their water extracts at 2.5% (w/v) and 5% (w/v) concentrations and residues of the same weeds with 0, 15 and 30 d decomposition periods at 2% (w/w) concentration. The results showed that the water extracts of M. indica and V. sativa at 5% concentration imposed the most inhibitory effect on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wheat; Weed allelopathy; Water extracts; Residues; Germination; Biomass production.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100287

Some biological aspects of the weed Lesser celandine (Ranunculus ficaria)
Provedor de dados: 87
Autores: Sohrabi Kertabad,S.; Rashed Mohassel,M.H.; Nasiri Mahalati,M.; Gherekhloo,J.
Lesser celandine (Ranunculaceae) is a perennial weed with tuberous root. Tubers are the most important means of reproduction and dispersion of this weed. In recent years, it has spread into wheat fields in Western Iran, mainly in the Lorestan province. A series of experiments were conducted to determine cardinal temperatures and to study the effects of pre-chilling, temperature fluctuations, tuber size, freezing and drying on germination of the tubers, as well as the effect of planting depth on sprouting of the tubers. The results obtained showed that the highest percentage of germination occurred when tubers were stored for more than 2 weeks at 4 or 8 ºC. The optimum temperature for germination differed in large and small tubers (8 and 14oC,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freezing; Germination; Osmotic potential; Tuberous root.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300010

Allelopathic effect of waste-land weeds on germination and growth of winter crops
Provedor de dados: 87
Autores: Hayyat,Muhammad S.; Safdar,Muhammad E.; Asif,Muhammad; Tanveer,Asif; Ali,Liaqat; Qamar,Rafi; H. Ali,Hafiz; Farooq,Naila; M.A. Javeed,Hafiz; H. Tarar,Zahid.
Abstract  Background:  Waste-land weeds present around the fields exert their allelopathic influence on crops through their leaf leachates and rhizospheric soils.  Objective:  A study was conducted to investigate the phytotoxic action of four common waste-land weeds Parthenium hysterophorus L., Achyranthes aspera L., Lantana camara L. and Withania somnifera L. through their aqueous extracts and rhizospheric soils against winter crops Avena sativa L., Cicer arietinum L., Hordeum vulgare L. and Triticum aestivum L.  Methods:  Experiments were conducted in Agronomy laboratory in College of Agriculture at the University of Sargodha. In first experiment, 5% (w/v) water extract from entire plant of each weed was applied to germinating seeds of crops whereas in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Aqueous extracts; Germination; Rhizospheric soil; Waste-land weeds; Winter crops.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100325

Effect of desiccation and salinity stress on seed germination and initial plant growth of Cucumis melo
Provedor de dados: 87
Autores: Sohrabikertabad,S.; Ghanbari,A.; Mohassel, Mohamad,H.R.; Mahalati,M.N.; Gherekhloo,J.
Smellmelon, an annual invasive weed of soybean production fields in the north of Iran, reproduces and spreads predominately through seed production. This makes seed bank survival and successful germination essential steps in the invasive process. To evaluate the potential of Smellmelon to invade water-stressed environments, laboratory studies were conducted to investigate the effect of desiccation and salinity at different temperatures on seed germination and seedling growth of Cucumis melo. Seeds were incubated at 25, 30, 35 and 40 ºC in the darkness in a solution (0, -0.2, -0.4, -0.6, -0.8, 1 and 1.2 MPa) of a salt (NaCl), and in a solution (0, -2, -4, -6, -8, -10, -12 bar) of PEG-6000 (Polyethylene glycol), in two separate experiments. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Osmotic potential; Cucurbitaceae; Seedling vigor index (SVL).
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400009

Physiological Performance of Seeds and Level of Herbicide Residues Depending on Application of 2.4-D in Wheat
Provedor de dados: 87
Autores: AISENBERG,G.R.; WESTENDORFF,N.R.; LANGARO,A.C.; VARGAS,L.; AGOSTINETTO,D.
ABSTRACT: Horseweed control through application of 2.4-D in the winter season is an alternative to manage biotypes resistant to herbicides that belong to other mechanisms of action. The objectives of this study were to assess the physiological quality of wheat seeds and determine the rate of 2.4-D residue, as function of application stages and herbicide rates. The treatments were arranged in factorial scheme, with three application stages (flowering, soft dough and hard dough), and four 2.4-D rates (0; 504; 1,008 and 2,015 g a.i. ha-1). The application of 2.4-D in the wheat crop changed physiological seed quality by increased the rate and total percentage of germination. The application of 2.4-D resulted in herbicide accumulation in seeds, especially when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Weeds; Germination; Dry matter.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100205

The Allelopathic Effect of Eucalyptus Leaf Extract on Grass Forage Seed
Provedor de dados: 87
Autores: Carvalho,F.P.; Melo,C.A.D.; Machado,M.S.; Dias,D.C.F.S.; Alvarenga,E.M.
This study aimed to evaluate the allelopathic effect of various concentrations of an aqueous extract of eucalyptus leaves on Urochloa decumbens and Panicum maximum seeds. The extract was prepared from Eucalyptus urograndis leaves that were milled and mixed with distilled water in a 1:9 milled leaves: water ratio to obtain an extract with a defined concentration of 100%. In addition, dilutions of 50%, 25% and 12.5% were prepared, and a 0% dilution was used as a control. The experiment followed a completely randomized design, with four replicates, each of 50 seeds of U. decumbens and 50 seeds of P. maximum, arranged on filter paper moistened with each concentration of extract in a Gerbox plastic box. The results demonstrated the allelopathic potential of E....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus urograndis; Urochloa decumbens; Panicum maximum; Agroforestry system; Germination; Seedling performance.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200193

Straw interference in the emergence of talquezal seeds from different origins
Provedor de dados: 87
Autores: Marchi,Sidnei R.; F. Marques,Ricardo; M. Souza,Rodrigo; F. Justo,Cristina; C. Martins,Cibele.
Abstract  Background: Talquezal (Paspalum virgatum L.) has become one of the main pasture weeds due to its association with the Urochloa brizantha death syndrome, a disease that causes the progressive death of clumps of susceptible grasses in patches, which leads to weed colonization and pasture degradation. Understanding the weed emergence pattern is essential in decision making for management strategies.  Objective: Thus, this study aimed to evaluate the emergence pattern of talquezal seedlings according to its origin and the amount of straw covering the soil.  Methods: The experiment was carried out in a greenhouse in a completely randomized design, with six replications and treatments arranged in an 8 × 3 factorial scheme with eight amounts of Urochloa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Paspalum virgatum L.; Razor grass; Seedling; Germination; Weed.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100309

Quick Test for Detecting Glyphosate-Resistant Ryegrass Seeds
Provedor de dados: 87
Autores: SCHMITZ,M.F.; ZANDONÁ,R.R.; VARGAS,A.A.M.; GARCIA,J.R.; TUNES,L.V.M.; AGOSTINETTO,D.
ABSTRACT: The commercialization of ryegrass seeds with the presence of resistant biotypes is a serious issue that increses the dispersion of resistance to new areas without this problem. Therefore, this study aimed to develop a quick test to detect susceptible and resistant seeds to the glyphosate herbicide in order to identify contaminated seed lots with glyphosate resistance. Three experiments were carried out, one in greenhouse and the other two in the seed laboratory. First, the resistance factor (RF) was determined by a dose-response curve experiment in biotypes suspected to be resistant and susceptible to glyphosate. Then, the germination test was conducted with the selected biotypes under increasing glyphosate rates (0, 3.5, 6.9, 13.9, 27.8, 55.5,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lolium multiflorum; Germination; Herbicide; Methodology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100243

Toxic action of aqueous wheat straw extract on horse e purslane
Provedor de dados: 87
Autores: Khaliq,A.; Matloob,A.; Aslam,F.; Mushtaq,M.N.; Khan,M.B.
The toxic action of aqueous wheat (Triticum aestivum) straw extracts was investigated on germination, early seedling growth, some biochemical attributes and the antioxidant enzymes of horse purslane (Trianthemaportulacastrum). Aqueous extracts of wheat straw were prepared by soaking the wheat straw in distilled water in 1:10 w/v ratio and diluted to obtain the concentrations of 0, 25, 50, 75 and 100%. These were used as pre and post emergence in laboratory and screen house trials. Wheat aqueous extracts exhibited phytotoxicity to horse purslane by inhibiting and delaying its germination and suppressing seedling growth. Wheat phytotoxins in its aqueous extracts suppressed the chlorophyll content and soluble protein, and enhanced soluble phenolics and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytotoxins; Germination; Seedling growth; Phenolics; Antioxidants.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000200005

Analysis of Genotypic Variability in Avena spp. Regarding Allelopathic Potentiality
Provedor de dados: 87
Autores: CARRARO-LEMES,C.F.; SCHEFFER-BASSO,S.M.; DEUNER,C.C.; BERGHAHN,S.C.T.
ABSTRACT: The recognized allelopathic activity of oats as a soil-cover plant induces the study of the potential of their germplasm. The objective of this study is to verify if there is genotype variability in the Avena spp. with regard to allelopathic activity. Extracts of A. strigosa ‘Agro Quaraí’, ‘Agro Esteio’, ‘Embrapa139’, ‘AF 12104’, ‘AF 12109’, ‘AF 12202’, ‘AF 12209’, A. sativa ‘UPFPS Farroupilha’ and ‘AF 1345 Ucraniana,’ were prepared in three concentrations w/v (5 g, 10 g, and 20 g of dry mass 100 mL-1). The experiment was conducted in a germination chamber for 15 days, with lettuce (Lactuca sativa L.) as the recipient plant. There was complete inhibition of germination under 20% w/v extracts and partial inhibition at 10% w/v. Only 5% w/v observed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena sativa L.; Avena strigosa Schreb; Weed; Germination; Inhibition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100297

High irradiance and temperature inhibit the germination of spores of the fern Rumohra adiantiformis (Forst.) Ching (Dryopteridaceae)
Provedor de dados: 88
Autores: BRUM,FRANCIS R.; RANDI,ÁUREA M.
Rumohra adiantiformis (Forst.) Ching is a fern (Dryopteridaceae) which is used to compose floral arrangements. Fertile fronds were harvested in the "Permanently Protected Area" of Ilha Comprida, São Paulo, Brazil. Sterilized spores were germinated in Mohr liquid medium modified by Dyer. The effect of 72%, 54%, 17% and 9% of total irradiance on germination under field conditions, was analyzed. Experiments were carried out in March (I), April (II) and August of 2000 (III). Under 54% and 72% of total irradiance in Experiment I (March) the germination was completely inhibited and partially inhibited under 72% of total irradiance in Experiment II (April). The lowest mean germination time (&lt;img border=0 width=10 height=12 id="_x0000_i1025"...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Irradiance; Rumohra adiantiformis; Temperature.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000002

The seed coat as a modulator of seed-environment relationships in Fabaceae
Provedor de dados: 88
Autores: SOUZA,FRANCISCO H. DÜBBERN DE; MARCOS-FILHO,JÚLIO.
The seed coat is one of the main determinants of seed germination, vigor and longevity potentials. It is also intimately associated with temporal and spatial dispersion of seed germination in a large number of plant species. The understanding of its properties and characteristics may explain, anticipate or even allow the modification of seed performance under certain environmental conditions. There is a growing volume of evidence associating seed coat characteristics to specific seed problems. For example, susceptibility to mechanical damage is related to lignin content of the seed coat, while seed longevity and tolerance to field weathering depends on seed coat integrity. Seed performance in many legumes has been associated with certain seed coat...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Vigor; Imbibition; Dormancy.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000400002

Variation between three Eremanthus (Asteraceae) species in their ability to form a seed bank
Provedor de dados: 88
Autores: Velten,Simone Batalha; Garcia,Queila Souza.
Knowledge on seed bank function is fundamental for understanding the species regeneration patterns. This investigation was carried out to compare the ability of Eremanthus elaeagnus (Mart. ex DC.) Schultz-Bip, E. glomerulatus Less., and E. incanus (Less.) Less. to form a soil seed bank. Seeds (aquenes) of each of these three species were collected, stored in the laboratory and subsequently buried in the same area where they were collected, inside nylon bags. The bags were collected monthly or bimonthly for germination tests under continuous light and also in darkness at 20 °C (E. elaeagnus e E. glomerulatus) and at 25 °C (E. incanus). After 12 months, a further series of tests compared the germination of achenes that had been buried in soil and compared...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asteraceae; Buried seeds; Eremanthus; Germination; Seed bank.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000400016

Germination of seeds of tropical pioneer species under controlled and natural conditions
Provedor de dados: 88
Autores: VÁLIO,IVANY FERRAZ MARQUES; SCARPA,FABIANO MICHELETTO.
Seed germination of eight tropical pioneer species (Cecropia hololeuca, C. pachystachya, C. glazioui, Solanum gracillimum, S. granuloso-leprosum, S. tabacifolium, Croton floribundus and Miconia chamissois) was studied. In controlled conditions, alternating temperatures were tested from 5 to 25 °C. Low Red:Far Red ratios (R:FR) were also examined. In the field, germination was evaluated in gaps and under the canopy. With the exception of Croton floribundus, all other species were photoblastic in that higher germination percentages were found under light conditions (S. tabacifolium behaved as a negative photoblastic species at some temperatures). No relationship was found between germination percentage and alternating temperature. Germination was markedly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pioneer species; Germination; Alternating temperatures; Gap and understory environments.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000100009

Physiological, morphological and biochemical characteristics of the sexual propagation of Piper aduncum (Piperaceae)
Provedor de dados: 88
Autores: Dousseau,Sara; Alvarenga,Amauri Alves de; Alves,Eduardo; Chaves,Izabel de Souza; Souza,Elma dos Santos; Alves,Juliana da Silva.
In this work we attempted to characterize the diaspores and the germination process of Piper aduncum L., as well as to verify the influence of the interaction between presence and absence of light (photoperiod of 12 hours and dark) and temperature (25 °C, 30 °C and 20-30 °C) and also of gibberellin (0, 50, 100, 200 and 400 mg L-1) on the root protrusion and normal seedlings formation. The diaspores are very small with a thousand seed weight of 0.3645 g, 13% moisture and protein reserve. Diaspores are strict positively photoblastic in the tested temperature range and the optimum temperature for root protrusion was 30 °C, while for normal seedlings was 25 °C. The previous permanence in the dark led to an increase in the speed of root protrusion and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Gibberellin; Light; Post-germination; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000300005

Efeito da temperatura na germinação de sementes e morfologia da plântula de Maquira sclerophylla (Ducke) C.C. Berg
Provedor de dados: 88
Autores: MIRANDA,PEDRO RAIMUNDO MATHIAS DE; FERRAZ,ISOLDE DOROTHEA KOSSMANN.
Maquira sclerophylla é uma árvore de interesse econômico madeireiro, encontrada na floresta de terra firme por toda a bacia Amazônica. Os objetivos deste trabalho foram estudar a morfologia do fruto, da semente e da plântula e observar o efeito de temperaturas constantes entre 10 e 35°C na germinação e formação de plântulas. Os frutos de M. sclerophylla são pseudodrupas globosas contendo uma grande semente também globosa, que representa cerca de 80% da massa fresca do fruto. A germinação é semi-hipogea e fanerocotiledonar, com cotilédones carnosos e viridiscentes. A emergência da radícula ocorreu nas temperaturas entre 15 e 35°C, porém, o desenvolvimento da plântula normal foi observado somente entre 20 e 30°C. Os resultados indicam 30°C como temperatura...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Effect of temperature; Germination; Seedling; Maquira sclerophylla; Moraceae.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500012

Effect of light and temperature on germination and early growth of Vochysia tucanorum Mart., Vochysiaceae, in cerrado and forest soil under different radiation levels
Provedor de dados: 88
Autores: BARBOSA,ANDRÉA RODRIGUES; YAMAMOTO,KIKYO; VALIO,IVANY F. M.
Vochysia tucanorum Mart. (Vochysiaceae) is a very widely distributed species in the cerrado and forests in Brazil, from the State of Bahia to Paraná. Its seed germination was analysed under eight treatments using different conditions of light and temperature. Up to 73 days, at least ca. 93% of the seeds germinated in all treatments, except under alternating temperatures of 35°/10°C (62%). Light enhanced germination, except under constant temperature of 25°C when seeds are not photoblastic. At this temperature, the highest percentage of germination was found. Initial vegetative growth was analysed by comparing the effects of shading, by means of different percentages of full daylight (100%, 45%, 10.6%, 4.8%), and soils from cerrado and forest. During 123...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Seedling growth; Shading; Vochysia tucanorum; Soil; Cerrado.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500008

Morfologia de frutos, sementes, plântulas e plantas jovens de Dimorphandra mollis Benth. - faveira (Leguminosae-Caesalpinioideae)
Provedor de dados: 88
Autores: FERREIRA,ROBÉRIO ANASTÁCIO; BOTELHO,SORAYA ALVARENGA; DAVIDE,ANTONIO CLAUDIO; MALAVASI,MARLENE DE MATOS.
Foram estudados os aspectos morfológicos externos e internos do fruto e da semente, além de aspectos externos do processo germinativo e das fases de plântula e planta jovem de Dimorphandra mollis Benth. O trabalho foi realizado em laboratório e casa de vegetação, sendo observado que os frutos são indeiscentes, as sementes são albuminosas, a germinação é epígea fanerocotiledonar e, na fase de planta jovem, ocorre um espessamento das raízes primária e secundárias. Os resultados apresentados podem ser úteis em estudos taxonômicos, em trabalhos de laboratório e viveiro, bem como para estudos de regeneração natural.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fruit; Seed; Germination; Seedlings; Dimorphandra mollis.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000300009

Ecophysiology and respiratory metabolism during the germination of Inga sessilis (Vell.) Mart. (Mimosaceae) seeds subjected to hypoxia and anoxia
Provedor de dados: 88
Autores: OKAMOTO,JANETE MAYUMI; JOLY,CARLOS ALFREDO.
This paper presents a study on the respiratory metabolism of germinating seeds of Inga sessilis subjected to normoxia, hypoxia and anoxia. Although it is typical of environments where waterlogging seldom occurs, 40% of its seeds are able to germinate under hypoxia; yet, anoxia periods over 96 h are lethal to the seeds. Ethanol is the main product of the seeds anaerobic metabolism, but the steep increase in lactate after 24 h anoxia or 48 h hypoxia may explain the drop in seed viability.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inga sessilis; Germination; Respiratory metabolism; Hypoxia; Anoxia.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000100006

Drying kinetics and physiological quality of ‘Cabacinha’ pepper seeds during storage
Provedor de dados: 91
Autores: Silva,Hellismar W. da; Vale Junior,Luís S. R.; Silva,Camila F.; Souza,Rannie do C.; Soares,Renato S.
ABSTRACT Drying air temperature has direct influence on seed quality, especially for vegetable species harvested with high moisture content. This study aimed to determine and model the drying curves of ‘Cabacinha’ pepper seeds (Capsicum chinense L.) at different temperatures, and to evaluate their physiological quality after drying and during storage. The experimental design was completely randomized in a 3 x 3 factorial scheme, with three drying temperatures (35, 38 and 42 °C) and three storage periods (0, 4 and 8 months), with four replicates. Seed quality was evaluated by germination test, first germination count, accelerated aging, electrical conductivity, seedling emergence, and speed of emergence. The Two Terms is the model that best represents the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum chinense L.; Drying temperature; Germination; Vigor.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400292

Physiological quality of soybean seeds artificially cooled and stored in different packages
Provedor de dados: 91
Autores: Virgolino,Zirvaldo Z.; Resende,Osvaldo; Gonçalves,Douglas N.; Marçal,Kaique A. F.; Sales,Juliana de F.
ABSTRACT The aeration of seeds with artificially cooled air and their storage in big-bag packages aim to lengthen the shelf life while maintaining the quality. Thus, the objective was to study the effects of cooling before storage on germination and vigor of soybean seeds stored in trifoliate kraft paper bag and big bag in non-air-conditioned environment. Seeds of soybean cultivar NA 7337 RR were mechanically harvested in March 2013, holding an average moisture content of 18% w.b. In June, 16,000 kg of seeds were processed and cooled to 18 °C. Equal amount of non-cooled seeds was used as a control. Equally divided in kraft paper and in big bags, and combining cooling and packaging, the seeds were stored for three months and analyzed for moisture content,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Storage; Temperature; Moisture contente; Vigor; Germination.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500473

Physiological quality of seed and seedling performance of crambe genotypes under water stress
Provedor de dados: 91
Autores: Machado,Fernando H. B.; David,Andréia M. S. de S.; Cangussú,Lucas V. S.; Figueiredo,Josiane C.; Amaro,Hugo T. R.
ABSTRACT Water stress is a condition that causes physiological changes in different species and even genotypes of the same species. One of the osmotic agents most used to simulate this condition is polyethylene glycol 6000. The aim of this study was to evaluate the effects of water stress on the physiological quality of seeds and performance of seedlings of crambe genotypes. A completely randomized design was used, in a factorial scheme with two genotypes (one cultivar and one line) and five osmotic potentials simulated with aqueous solutions of polyethylene glycol 6000 (control = 0, -0.25, -0.50, -1.0, -1.50 MPa), with four replicates of 50 seeds per treatment. The effects of the treatments were evaluated by means of germination, first count, germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crambe abyssinica Hoechst; Germination; Polyethylene glycol.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300175

Physiological quality of seeds of crambe desiccated at pre-harvest with glyphosate
Provedor de dados: 91
Autores: Cangussú,Lucas V. de S.; David,Andréia M. S. de S.; Araújo,Eduardo F.; Alves,Rayane A.; Nunes,Rebeca A.; Amaro,Hugo T. R.
ABSTRACT Early harvest may decrease seed exposure in the field after physiological maturation. The objective of this study was to evaluate the effect of glyphosate desiccant at different plant desiccation times at pre-harvest on the physiological quality of crambe (Crambe abyssinica Hochst) seeds. The experimental design was completely randomized in a 2 x 4 factorial scheme, involving the application of glyphosate desiccant in the plants at pre-harvest and the control (without plant desiccation) and four desiccation times, with three replicates per treatment. The desiccation of crambe plants at pre-harvest with glyphosate was efficient, positively affecting seed germination and vigor. Application of the desiccant in the plants, with 90% of brown seeds, at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crambe abyssinica; Brassicaceae; Maturation; Herbicide; Germination.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800577

Development of seedlings of watermelon cv. Crimson Sweet irrigated with biosaline water
Provedor de dados: 91
Autores: Silva,José E. S. B. da; Matias,Janete R.; Guirra,Keylan S.; Aragão,Carlos A.; Araujo,Gherman G. L. de; Dantas,Bárbara F.
ABSTRACTThe limited access and the scarcity of good quality water for agriculture are some of the major problems faced in agricultural areas, particularly in arid and semiarid regions. The aim of this study was to evaluate the quality of watermelon seedlings (cv. Crimson Sweet), irrigated with different concentrations of biosaline water of fish culture. The experimental design was completely randomized with five treatments, corresponding to biosaline water at different concentrations (0, 33, 50, 67 and 100%), and four replicates of 108 seedlings. Watermelon seeds were sown in plastic trays filled with commercial substrate and irrigated with different solutions of biosaline water. Seedlings were harvested for biometric analysis at 14, 21 and 28 days after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrullus lanatus; Wastewater; Salinity; Germination.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000900835

Different harvest times and physiological quality of coriander seeds
Provedor de dados: 91
Autores: Alkimim,Emilly R.; David,Andréia M. S. de S.; Sousa,Tiago V.; Rodrigues,Cleiton G.; Amaro,Hugo T. R.
ABSTRACT The season of harvest is one of the most important factors influencing seed quality. This study evaluated the effect of different harvesting times on the physiological quality of Coriandrum sativum L. seeds, cv. Palmeira. The experimental design was completely randomized, with six treatments (harvest times) and four replications. The experiment was conducted during the months of April to October 2010. The first moment to harvest seeds was carried out 15 days after full bloom, when approximately 50% of plants were in flowering phase. Other harvests (22, 29, 36, 43 and, 50 days after bloom) were carried out at 7 days intervals until the seeds reached 16.0% of moisture, which occurred in the 6th harvest. Immediately after each harvest, the seeds were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coriandrum sativum L.; Germination; Vigor; Water content.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200133

Proline and trehalose in maize seeds germinating under low osmotic potentials
Provedor de dados: 91
Autores: Queiroz,Rafaela J. B.; Cazetta,Jairo O.
ABSTRACT Although it is relatively well known that adult plants tend to accumulate proline and trehalose in their tissues as a physiological mechanism in response to drought, there is scarce information about the development of this physiological response in seeds. Thus, the objective of this research was to verify if maize seeds are able to develop mechanism of osmoprotection, when are germinating under low osmotic potential, and the possibility to use the levels of trehalose and proline in a defined seed part, aiming to differentiate genotypes regarding drought tolerance. The experiment was performed as a factorial arrangement of 2 x 5 (2 hybrids x 5 osmotic potential) within a completely randomized design, with four replicates. It was found that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Germination; Water restriction; Osmoregulation; Compatible solutes.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100022

Effect of temperature on percentage of germination of canistel seeds (Pouteria campechiana)
Provedor de dados: 94
Autores: Andrade,Renata Aparecida de; Martins,Antonio Baldo Geraldo; Sarzi,Isabele.
The canistel is a fruit originated in Mexico and Central America, being introduced in Brazil in 1986. The plants present medium size, however it can reach up to 15 meters of height; the leaves measure about 10 to 25 cm; the flowers are complete and small and the fruit presents yellow coloration when ripe, with whitish pulp and sweet flavor. The propagation can be realized by seed or grafting. In view of almost total absence of information about the culture and the possibility to have a commercial cultivation, the present work, was live in which the effect of the temperature was evaluated in the percentage of germination of the seeds. It was checked that the best averages were obtained in temperature of 30ºC and the minor in 15ºC, 20ºC and 40ºC could be...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pouteria campechiana; Germination; Seeds.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452002000300010

Monitoring the viability of citrus rootstocks seeds stored under refrigeration
Provedor de dados: 94
Autores: Carvalho,Sérgio Alves de; Silva,Luis Fernando Carvalho.
The citrus nursery tree is produced through the bud grafting process, in which rootstock is usually grown from seed germination. The objective of this research was to evaluate, in two dissimilar environmental conditions, the viability and polyembryony expression of five citrus rootstocks seeds stored in different periods under refrigeration. The rootstock varieties evaluated were: Rangpur lime (Citrus limonia Osb. cv. Limeira), Trifoliate orange (Poncirus trifoliata Raf. cv. Limeira), Citrumelo (P. trifoliata x C. paradisi Macf. cv. Swingle), Sunki mandarin (C. sunki Hort. ex Tanaka) and Volkamer lemon (C. volkameriana Ten. &amp;amp; Pasq. cv. Catania 2). The experimental design was the randomized blocks in a 11 x 5 x 2 factorial scheme, evaluating from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propagation; Seed storage; Germination; Polyembryony.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000100027

Changes in hormonal balance as key to reserve degradation after dormancy overcoming in Annona macroprophyllata and Annona purpurea seeds
Provedor de dados: 94
Autores: Ferreira,Gisela; De-la-Cruz-Chacón,Ivan; González-Esquinca,Alma Rosa.
Abstract  Studies on the effect of the applying of phytoregulators to overcome seed dormancy have been carried out in Annonaceae species, thus the endogenous relationship between abscisic acid and gibberellins after the application of phytoregulators needs to be known in these species. Considering the importance of hormonal balance in dormancy mechanisms, the aim of this research was to elucidate how endogenous ABA and GA concentrations change after the application of phytoregulators in seeds and how these changes affect reserve degradation during germination of Annona macroprophyllata and A. purpurea seeds. Seeds were submitted to three conditions: - no soaking, soaking-in-water and soaking-in-GA4+7+benzyladenine. ABA, GA, lipids, proteins, and total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abscisic acid; Gibberellins; Germination; Lipids; Proteins; Soluble sugars; Plant growth regulators; Phytoregulators.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000602002

Influence of the temperature in germination of seeds of jabuticaba tree
Provedor de dados: 94
Autores: Andrade,Renata Aparecida de; Martins,Antonio Baldo Geraldo.
The jaboticaba tree (Myrciaria spp.) is originated from the center-south of Brazil and presents different types. It's a medium size tree, with tendency to form a crown with great number of branches. A characteristic considered as limitant for the commercial crop is the great juvenility, advicing producing good rootstocks of seedlings and graft wanted varieties, and other vegetative processes. With the purpose of evaluating the effect of temperature on germination of three clones of jaboticaba tree, was carried out a laboratorial research. It was observed influence of the temperature on germination. The highest percentage of germination was obtained at low temperature (15ºC and 20ºC). When it was used the temperature of 35ºC, two clones had only 8% of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myrciaria spp.; Seeds; Germination.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452003000100056

Technological innovations in the propagation of Açaí palm and Bacuri
Provedor de dados: 94
Autores: CARVALHO,JOSÉ EDMAR URANO DE; NASCIMENTO,WALNICE MARIA OLIVEIRA DO.
ABSTRACT  Açaí palm (Euterpe oleracea Mart.) and bacuri tree (Platonia insignis Mart.) are two important fruit species native to the Brazilian Amazon. The first species is widely cultivated in the Brazilian Amazon and with some orchards established in other regions of Brazil. Nevertheless, most of its production still comes from the dense and diversified native açaí orchards found in the floodplains of the Amazon River estuary and that in the last two decades have been managed for the production of fruits. The production of the second species is still dependent on extractivism of abundant natural populations in areas of secondary vegetation. Both species reproduce naturally sexually and asexually. In the case of açai tree, asexual reproduction occurs by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euterpe oleracea; Germination; Grafting; Platonia insignis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000104002

Water absorption and physiological responses of hog plum tree diaspores to storage
Provedor de dados: 94
Autores: Carvalho,José Edmar Urano de; Nascimento,Walnice Maria Oliveira do.
Abstract  Hog plum tree seeds (Spondias mombin L.) have a complex dormancy mechanism, which causes slow germination and great unevenness. At present, there are no efficient methods to promote seed germination. The objective of the study was to evaluate the effect of storage on overcoming seed dormancy of this Anacardiaceae. Diaspores of two hog plum trees were used, identified as Mother plant 1 and Mother plant 2, established in Tomé-Açu city, PA. Initially, it was investigated whether the structures surrounding the seeds (internal mesocarp and endocarp) prevent water absorption. For this, the diaspores of the two mother plants were sown between blotting paper, with an adequate level of water and, periodically, in the total of 144 hours, the water content...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spondias mombin L.; Germination; Dormancy.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000302001

Physiological responses of seeds from full-sib guava families to different substrate temperatures
Provedor de dados: 94
Autores: Maitan,Mariana Quintas; Viana,Alexandre Pio; Vieira,Henrique Duarte; Silva,Carla Caroline Amaral da; Rodrigues,Daniele Lima; Leal,Lucas Souza da Silva.
Abstract  Guava is an important fruit in Brazil and worldwide. However, research has yet to advance on its breeding and seed technology, an essential factor for the development of productive genotypes with germination potential which would support the continuity of breeding programs. In search of a methodology for routine analysis testing of guava seeds under genetic control, this study examined the effect of temperature and substrate on the germination of guava seeds from full-sib families. The experiment was laid out in a completely randomized design with a 5 × 4 factorial arrangement consisting of the combination of five temperatures (25, 30, 35, 20-30 and 25-35 °C) and four substrates (paper roll, on-paper, in-sand and on-sand), with eight replicates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava; Germination; Germination speed index.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000602001

CHEMICAL COMPOSITION AND TETRAZOLIUM TEST OF Syagrus romanzoffiana (Cham.) Glassman SEEDS
Provedor de dados: 94
Autores: IOSSI,EMERSON; MORO,FABIOLA VITTI; VIEIRA,BRUNO GUILHERME TORRES LICURSI; BARBOSA,RAFAEL MARANI; VIEIRA,ROBERVAL DAITON.
ABSTRACT  Queen palm is a tropical species of ecological importance and economic potential in various uses, including food. However, the knowledge about the nutritional value of fruits and the estimation of seed viability are still scarce. The aims of this work were to study the biometrics and chemical composition of fruits and seeds; describe the anatomy of embryos and assess the viability of the tetrazolium test. Mature fruits were collected, processed and submitted to biometry, water content, pulp and seeds chemical composition, germination and emergence in the laboratory evaluations. For the tetrazolium test, whole embryos were immersed in solution at 40 °C for one, two, four and six hours and compared with germination. The fruit pulp is rich in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Queen palm; Embryo; Germination; Palm; Pyrene.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000402001

Illustrated guide to the classification of banana seeds and embryos
Provedor de dados: 94
Autores: Silva,Manassés dos Santos; Rodrigues,Taise Conceição; Aud,Fabiana Ferraz; Santos-Serejo,Janay Almeida dos; Amorim,Edson Perito.
Abstract  Considering there is no illustrated scale of the principle anomalies observed for banana seeds, the objective of this guide is to cover in detail, for the first time, the categories to classify the most common types of anomalies observed in banana embryos and seeds, as well as in vitro embryo rescue and culture, taking into account the experience acquired by the banana breeding program at Embrapa in Brazil. Four classes to classify the seeds were proposed and with regards to classifying the embryos, eight classes were established.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: In vitro culture; Germination; Genetic improvement; Musa spp; Embryo rescue.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000210001

Evaluation of pregerminative treatments in gulupa seeds (P. edulis f. edulis Sims).
Provedor de dados: 94
Autores: Camargo,María Antonia Martínez; Coronado,Ana Cruz Morillo; Mora,Edilberto Cepeda; Fernández,Sandra Yaneth Mesa.
Abstract  The genus Passiflora, commonly known as fruits of passion, includes numerous species, including gulupa (Passiflora edulis f. edulis), of nutracetic and economic importance, both for consumption in nature and for its agro-industrial applicability. This research was developed to evaluate the effects of various pre-germinative treatments on the germination of gulupa seeds from the municipality of Ramiriquí (Boyacá), such as: exposure to hydrogen peroxide (H2O2), hypochlorite of sodium (NaOCl), gibberellic acid (GA3), distilled water imbibition and stratification at 4 °C, in varying concentrations and exposure times (24 and 48 hours), using an experimental design completely random, with three repetitions of 50 seed each one. Statistical analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora; Gulupa; Germination; Hydrogen peroxide; Gibberellic acid; Sodium hypochlorite.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000302003

Conditioning in the promotion and uniformization of Umbu seed germination
Provedor de dados: 94
Autores: Barros,Renato Teo; Martins,Cibele Chalita; Pereira,Francisco Elder Carlos Bezerra; Silva,Givanildo Zildo da.
Abstract  Seed dormancy may decrease during storage and some environmental conditions may accelerate this process. The aim of this work was to determine efficient techniques to condition umbu seeds in order to promote and standardize their germination. Seeds were stored for 180 days in paper bags kept in five ambient conditions: laboratory (25 ºC and 55% RH); warm oven (40 °C and 53% RH); hot oven (50 °C and 49% RH); dry chamber (18 °C and 65% RH) and cold chamber (10 °C and 65% RH). Seed quality was evaluated every 60 days by means of the following tests and determinations: water content; germination test (25 °C and 55% RH, weekly evaluated up to 91 days after sowing); first count test (14 days); germination rate index; mean germination time and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Storage; Dormancy; Germination; Fruit trees; Spondias tuberosa.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000102001

Propagation of Annonaceous plants
Provedor de dados: 94
Autores: Ferreira,Gisela; De-La-Cruz-Chacón,Iván; Boaro,Carmen Silvia Fernandes; Baron,Daniel; Lemos,Eurico Eduardo Pinto de.
Abstract  This review aims to present advances in studies on the propagation of the Annonaceae species, which includes species of economic importance such as: soursop, custard apple, atemoya and cherimoya. In sexual propagation, advances are mainly related to a better understanding of the stages of seed development, dormancy mechanisms, and germination. In asexual propagation, compatibility studies between grafts and rootstocks are presented, focusing on the expression of genes involved in tissue formation. The cutting method is also discussed, which is another option for the propagation for this group of plants considered difficult to root, approaching endogenous and exogenous factors related to the subject, as well as management strategies that affect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annonaceae; Seed dormancy; Germination; Grafting; Cutting.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000104002

Oxidative metabolism altered by plant growth regulators in atemoia seeds (Annona x atemoya Mabb.) ‘Thompson’
Provedor de dados: 94
Autores: Hata,Ana Paula Yuki; Ferreira,Gisela; Sousa,Marília Caixeta; Bezerra,Breno Kennedy Lima; Kissmann,Camila.
Abstract  The objective of this work was to validate the enzymatic activity in Annona x atemoyaseeds submitted to treatments with plant growth regulators belonging to the group of gibberellins and cytokinins for overcoming dormancy during the germination process. Initially, the water acquisition curve was determined, where two points of phase II (72 and 144 hours) were determined to evaluate the activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) enzymes in atemoya seeds after the application of two plant growth regulators. Treatments with GA resulted in higher activity of SOD enzyme, which may be favored the higher germination percentage and speed in comparison to control treatment. In cases in which SOD enzyme presented high...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Annonaceae; Enzymatic activity; Gibberellin; Cytokinin.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452021000102001

Influence of the substrate in germination of lychee seeds
Provedor de dados: 94
Autores: Andrade,Renata Aparecida de; Martins,Antonio Baldo Geraldo; Oliveira,Inez Vilar de Morais.
The lychee is, all over the world, considered as the "queen of the fruits" due to the delicacy of its appearance and flavor. Although it was only recently that it started to have economical importance in Brazil, the lychee is already calling the attention of numerous farmers, mainly those who cultivate citric fruits and/or sugarcane in the State of São Paulo, due to the constant and at the same time growing necessity of finding new alternative crops. Considering that the commercial cultivation of lychee plants in the field requires the previous obtainment of rootstocks viewing to reduce the genetic variability and the length of the juvenile period displayed by plants resulting directly from the seeds, finding ways to improve the germination performance of...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Litchi chinensis Sonn; Seeds; Germination.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452004000200049

PHYSIOLOGICAL POTENTIAL AND CONSERVATION OF MURUCI (Byrsonima crassifolia) SEEDS
Provedor de dados: 94
Autores: GRZYBOWSKI,CAMILA RIBEIRO DE SOUZA; NASCIMENTO,WALNICE MARIA OLIVEIRA DO; SILVA,ROSEMEIRE CARVALHO DA; VIEIRA,ELISA SERRA NEGRA; PANOBIANCO,MARISTELA.
ABSTRACT  The goal of the present study is to assess the physiological potential of Byrsonima crassifoliaseeds and analyze the procedures of the germination and tetrazolium tests, as well as the conservation of such seeds by testing different combinations of packaging and environment. The experiment used pyrenes of the clone Açu, collected from mother plants in the germplasm collection of muruci plants of Embrapa Amazonia Oriental, in Belém, Brazil. Different temperatures were tested in the germination test (25, 30, 35 and 20 - 30 ºC). The best methodology and assessment dates were determined for the test, and the seedlings of the species were characterized. Viability was assessed with the tetrazolium test, with combinations of hydration methods (by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyrene; Germination; Tetrazolium test; Storage.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000502001

Physiological quality of pelleted Cubiu (Solanum sessiliflorum Dunal) seeds
Provedor de dados: 94
Autores: Sprey,Layanne Muniz; Ferreira,Sidney Alberto do Nascimento; Sprey,Maylla Muniz.
Abstract  The objective of this study was to evaluate the effect of different coating materials on the physiological quality of cubiu seeds. This was evaluated with three agglomerate materials (manioc starch, inert talc and dolomitic limestone) and two binder polymers (polyvinyl acetate and gum arabic) with 30% concentration, and artificial dye finishing. The experimental design was completely randomized, in factorial scheme 3 (agglomerates) x 2 (binders), and additional treatment (bare seeds/control), containing four replicates and experimental units of fifty seeds/pellets. The seeds were evaluated for: yield; seed/pellet diameter; thousand seed weight; number of seeds per pellets; germination; germination speed index; mean germination time, seedling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanaceae; Seed coating; Germination; Vigor.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000102001

Physiological response of cowpea seeds to salinity stress
Provedor de dados: 95
Autores: Dantas,Bárbara França; Ribeiro,Luciana de Sá; Aragão,Carlos Alberto.
This work aimed to evoluate physiological response of cowpea (Vigna unguiculata L. Walp) seeds submitted to salt stress. Seeds of cultivars 'Epace-10'; 'Canapu' and 'Pitiúba' of cowpea, were submitted to germination test in germinator at 25(0)C, in "germitest" papers imbibed in distilled water or in 0, 10, 50, 100 and 200mol m-3 NaCl solutions. At the first and second counting of the germination test, normal seedlings were accounted, weighted and dried, obtaining data for vigor, total germination, fresh matter weight and dry matter weight. The seedlings hypocotyls, root and total length were measured total proteins content in cotyledons were obtained from germinating seeds. The presence of salt at concentrations higher than 50mol m-3 NaCl affect the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Sodium chloride; Germination; Vigor; Protein.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222005000100018

Assessment of physiological potential of cucumber seeds using the software Seedling Vigor Imaging System® (SVIS®)
Provedor de dados: 95
Autores: Chiquito,Adrielle Aparecida; Gomes Junior,Francisco Guilhien; Marcos-Filho,Julio.
The software Seed Vigor Imaging System (SVIS®), has been successfully used to evaluate seed physiological potential by automated analyses of scanned seedlings. In this research, the efficiency of this system was compared to other tests accepted for assessing cucumber (Cucumis sativus L.) seed vigor of distinct seed lots of Supremo and Safira cultivars. Seeds were subjected to germination, traditional and saturated salt accelerated aging, seedling emergence, seedling length and SVIS analyses (determination of vigor indices and seedling growth uniformity, lengths of primary root, hypocotyl and whole seedlings). It was also determined whether the definition of seedling growth/uniformity ratios affects the sensitivity of the SVIS®. Results showed that analyses...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis sativus; Quality control; Germination; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000200010

Methods of overcoming dormancy in Schizolobium amazonicum Huber ex Ducke (Leguminosae - Caesalpinioideae) seeds
Provedor de dados: 95
Autores: Cruz,Eniel David; Carvalho,José Edmar Urano de.
Seed dormancy is a frequent phenomenon in tropical species, causing slow and non-uniform germination. To overcome this, treatments such as scarification on abrasive surface and hot water are efficient. The objective of this study was to quantify seed germination with no treatment (Experiment 1) and identify an efficient method of breaking dormancy in Schizolobium amazonicum Huber ex Ducke seeds (Experiment 2). The effects of manual scarification on electric emery, water at 80ºC and 100ºC and manual scarification on wood sandpaper were studied. Seeds were sown either immediately after scarification or after immersion in water for 24h in a sand and sawdust mixture. Germination and hard seed percentages and germination speed were recorded and analyzed in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical tree; Germination; Germination speed; Hard seeds; Dead seeds.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222006000300016

Floral biology and characterization of seed germination in physic nut (Jatropha curcas L.)
Provedor de dados: 95
Autores: Brasileiro,Beatriz Gonçalves; Dias,Denise Cunha Fernandes dos Santos; Bhering,Maria Carmen; Dias,Luiz Antônio dos Santos.
The objective of this study was to characterize morphologically the seed germination and floral biology of Jatropha curcas grown in Viçosa, Minas Gerais state. The floral biology study was made on fresh inflorescences of 20 plants. For the post-seminal development study, the seeds were submitted to laboratory and greenhouse germination test. J. curcas has flowers of both sexes within the same inflorescence, with each inflorescence having an average of 131 flowers, being 120 male and 10.5 female flowers. Low numbers of hermaphrodite flowers were also found, ranging from 0 to 6 flowers per inflorescence. The germination of J. curcas begins on the third day with radicle protrusion in the hilum region. The primary root is cylindrical, thick, glabrous and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physic nut; Flowering; Morphology; Germination.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000400005

Test of exudates color hues for evaluating the physiological potential of coffee (Coffea arabica L.) seeds
Provedor de dados: 95
Autores: Hilst,Paulo Cesar; Dias,Denise Cunha Fernandes dos Santos; Alvarenga,Eveline Mantovani; Souza,Bruna Luiza de.
Coffee seeds have slow and irregular germination, losing fast their viability during storage, and the standard germination test of these seeds requires at least 30 days. Besides, the results may not reflect the actual physiological quality of these seeds. The objective of this work was to develop a fast and practical test for evaluating the viability of coffee seeds, which is based on the interpretation of different color hues of exudates from seeds. Coffee seeds of the cultivar Catuai 44 from six lots were submitted to germination, accelerated aging, and electrical conductivity tests. In the exudates color hue test, coffee seeds without the parchment and the silvery pellicle (four replications of 10 seeds each) were distributed on top of paper towels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching; Seed quality; Seed analysis; Germination; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000200004

Physiological maturity of eggplant seeds
Provedor de dados: 95
Autores: Martins,Denize Carvalho; Vilela,Fernanda Keila Junqueira; Guimarães,Renato Mendes; Gomes,Luiz Antônio Augusto; Silva,Priscila Alves da.
Determination of seed physiological maturity and ideal moment for harvesting fruits to extract their seeds are important aspects to produce seeds with high quality. To identify the best period for harvesting eggplant fruits, associated with ideal resting period of the fruit for extracting seeds, an eggplant production field was installed in municipality of Ijaci, in the State of Minas Gerais, Southwestern Brazil. The fruits were harvested at periods of 49, 56, 63, 70, and 77 days after pollination (DAP). The seeds of fruits harvested in each period were manually extracted immediately after harvest or after a post-harvest resting period of seven days, under a shed. The physiological quality of seeds was assessed by tests of: germination percentage;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum melongena; Harvest; Germination; Resting period.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000400002

Adhesion of uredospores of Phakopsora pachyrhizi on soybean seeds and their viability during storage
Provedor de dados: 95
Autores: Magnani,Elisandra Batista Zambenedetti; Mendonça,Elisabeth Aparecida Furtado de; Albuquerque,Maria Cristina de Figueiredo e.
To study adhesion and viability of uredospores of the fungus Phakopsora pachyrhizi on soybean seeds during storage, suspension tests of those uredospores were carried out by washing seeds at each 30 days interval. Furthermore, germination and inoculation tests of uredospores on soybean plants were performed with uredospores collected from seeds of two soybean production areas, located in the municipalities "Chapada dos Guimarães" and "Tangará da Serra", State of Mato Grosso, Brazil. High levels of uredospores infestation were detected before storage [249.31 and 85.18 uredospores/100 seeds (U/100)] on seeds collected in both localities, respectively. After 30 days storage, these figures were 46.12 and 122.5 U/100; at 60 days were 14.62 and 26.62 U/100; and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soybean rust; Spores; Germination; Infection.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000200006

Performance of different drying methods and their effects on the physiological quality of grain sorghum seeds (S. bicolor (L.) Moench)
Provedor de dados: 95
Autores: Franke,Lucia Brandão; Torres,Miguel Ângelo Peixoto; Lopes,Rodrigo Ramos.
This experiment viewed to evaluate the physiological quality of grain sorghum seeds as well as to determine the respective drying curve of each of three drying methods. The seeds harvested at 18.9%, 18.1%, and 18.2% of moisture content were submitted to the following drying methods : a) under natural conditions, b) an intermittent dryer in which the combustion of firewood was the source of caloric energy, and c) a stationary dryer in which the source of caloric energy was the burning of liquefied petroleum gas. The experimental design was a completely randomized one with 25 repetitions of one hundred seeds each. The water contents and weight of one thousand seeds were evaluated. Seeds physiological quality was evaluated by germination and vigor tests. Seed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural drying; Artificial dryer; Drying speed; Germination; Vigor.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222008000300024

Drying soybean seed using air ambient temperature at low relative humidity
Provedor de dados: 95
Autores: Krzyzanowski,Francisco Carlos; West,Sherlie Hill; França Neto,José de Barros.
Under subtropical and tropical environments soybean seed (Glycine max (L.) Merrill) are harvested early to avoid deterioration from weathering. Careful after-harvest drying is required and is an important step in maintaining the physiological quality of the seed. Soybean seed should be harvested when the moisture content is in a range of 16-20%. Traditional drying utilizes a high temperature air stream passed through the seed mass without dehumidification. The drying time is long because the system is inefficient and the high temperature increases the risk of thermal damage to the seed. New technology identified as heat pipe technology (HPT) is available and has the unique feature of removing the moisture from the air stream before it is passed through the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Quality; Vigor; Germination; Conditioning.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222006000200010

Physiological maturity of seeds and colorimetry of fruits of Jatropha curcas L.
Provedor de dados: 95
Autores: Dranski,João Alexandre Lopes; Pinto Júnior,Artur Soares; Steiner,Fábio; Zoz,Tiago; Malavasi,Ubirajara Contro; Malavasi,Marlene de Matos; Guimarães,Vandeir Francisco.
The objective was to relate the coloration of fruits of Jatropha curcas L during the maturation process with morphometric (fruits and seeds) and germinative characteristics (seeds). Fruits were collected at various maturation stages from mast trees located in Eldorado/MS, and six maturation stages were visually classified based on fruit's epicarp color. Epicarp digital colorimetry was used to characterize maturation stages in addition to morphometric variables of length and width of fruits and seeds, as well their water content. For determining the physiological potential it was used germination test, emergence velocity index and first count of germination. Results indicated that seeds of J. curcas should be harvested when fruit epicarp shows a reading...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maturation stage; Germination; Refractance; Morphometry.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000400018

Physiological quality of soybean and wheat seeds produced with alternative potassium sources
Provedor de dados: 95
Autores: Toledo,Mariana Zampar; Castro,Gustavo Spadotti Amaral; Crusciol,Carlos Alexandre Costa; Soratto,Rogério Peres; Nakagawa,João; Cavariani,Cláudio.
The use of unconventional sources of K for plants has been widely studied, but the effects of alternative materials on physiological seed quality are still relatively unknown. The objective of this study was to evaluate the physiological quality of soybean and wheat seeds after using different potassium sources in a crop succession. The experimental design was a completely randomized block with four replications. Treatments consisted of three K sources (KCl, alkaline rock and ground phonolite, with 58%, 11% and 8.42% of K2O, respectively) applied in four doses (0, 25, 50 and 100 kg K2O ha-1). Potassium doses were applied in soybean and their residual effects were evaluated on the following wheat crop. Soybean and wheat seeds were evaluated immediately...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Triticum aestivum; Germination; Potassic rock; Residual effects.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000200019

Physiological quality of barley seeds submitted to saline stress
Provedor de dados: 95
Autores: Silva,Rodrigo Nascimento da; Lopes,Nei Fernandes; Moraes,Dario Munt de; Pereira,Ana Lúcia de Almeida; Duarte,Gisela Loureiro.
The objective of the experiments was to determine the influence of the effects of different salt levels (zero, 15, 30, 45 and 60mM NaCl) on the physiological quality of seeds of two barley cultivars (BRS 195 and AF 98067). Assays were conducted to evaluate salt stress on germination and vigor. The germination and germination rate of the barley seeds decreased as salt levels increased, reducing the seed viability and vigor. The salinity affected the membrane integrity, mainly in AF 98067 that showed more sensitivity to salt stress.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hordeum vulgare; Germination; Vigor; Salt.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222007000100006

Drying peanut seed using air ambient temperature at low relative humidity
Provedor de dados: 95
Autores: Krzyzanowski,Francisco Carlos; West,Sherlie Hill; França Neto,José de Barros.
The moisture content of peanut kernel (Arachis hypogaea L.) at digging ranges from 30 to 50% on a wet basis (w.b.). The seed moisture content must be reduced to 10.5% or below before seeds can be graded and marketed. After digging, peanuts are cured on a window sill for two to five days then mechanically separated from the vine. Heated air is used to further dry the peanuts from approximately 18 to 10% moisture content w.b. Drying is required to maintain peanut seed and grain quality. Traditional dryers pass a high temperature and high humidity air stream through the seed mass. The drying time is long because the system is inefficient and the high temperature increases the risk of thermal damage to the kernels. New technology identified as heat pipe...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis hypogaea; Quality; Vigor; Germination; Conditioning.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222006000300001

Using X rays to evaluate fissures in rice seeds dried artificially
Provedor de dados: 95
Autores: Menezes,Nilson Lemos de; Cicero,Sílvio Moure; Villela,Francisco Amaral; Bortolotto,Rafael Pivotto.
The objective of the present study was to evaluate the efficiency of X-rays in identifying fissures in artificially dried rice seeds and the relationship between damage and seed performance in the germination test. Irrigated rice seeds of the IRGA 417 and IRGA 420 cultivars were harvested with 23.3 and 24.5% water content respectively and submitted to stationary drying treatments at 32, 38, 44 and 50 °C. X-rays were taken of subsamples of 100 seeds for each treatment, using an MX-20 X-ray equipment. The X-rayed seeds were classified from 1 to 3, where 1 corresponded to seeds without fissures, 2 to seeds with non-severe fissures and 3 to seeds with severe fissures. The same X-rayed seeds were planted and on the seventh day the seedlings (normal or abnormal)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa L; Image analysis; Seed quality; X-ray images; Germination.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000100009

Physiological quality of wheat seeds submitted to saline stress
Provedor de dados: 95
Autores: Duarte,Gisela Loureiro; Lopes,Nei Fernandes; Moraes,Dario Munt de; Silva,Rodrigo Nascimento da.
The objective of this experiment was to determine the influence of different salt levels (zero, 15, 30, 45 and 60mM NaCl) on seed physiological quality of two wheat cultivars (BRS 177 and BRS 179). SUMMARIZE METHODOLOGY. The results allow the following conclusions: the physiological quality (germination and vigor) of wheat seeds, cultivars BRS 179 and BRS 177, decrease with the increase of the salinity. The wheat seeds cv. BRS 179 performs better than BRS 177, mainly in higher salt concentrations (³ 45mM of NaCl). The electric conductivity of wheat seeds increases in function of the increment of the saline concentrations.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Germination; Vigor; Salt.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222006000100017

Action of gibberellic acid (GA3) on dormancy and activity of alpha-amylase in rice seeds
Provedor de dados: 95
Autores: Vieira,Antônio Rodrigues; Vieira,Maria das Graças Guimarães Carvalho; Fraga,Antônio C.; Oliveira,João Almir; Santos,Custódio D. dos.
To evaluate the effectiveness of gibberellic acid (GA3) in breaking rice seed dormancy and the use of alpha-amylase enzyme activity as an indicator of the dormancy level, seed from the intensively dormant irrigated cultivar Urucuia were used. The seeds were submitted to a pre-drying process in a forced air circulation chamber under 40ºC during 7 days and submersed in 30 mL of GA3 solution under 0, 10, 30 and 60 mg/L H2O concentrations, during 2, 24 and 36 hours. After the treatments, the alpha-amylase activity was determined by using the polyacrilamide electrophoresis and spectrophotometry. At the same time, the germination test was made. The results indicated a gain in germination and in alpha-amylase activity in higher concentrations and soaking time of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rice seeds; Dormancy; Germination; Gibberellic acid (GA3); Alpha-amylase.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222002000200008

Viability of barley seeds by the tetrazolium test
Provedor de dados: 95
Autores: Grzybowski,Camila Ribeiro de Souza; Ohlson,Osvaldo de Castro; Silva,Rosemeire Carvalho da; Panobianco,Maristela.
The tetrazolium test is used to control seed quality of various plant species since it allows a rapid evaluation of viability. Freshly harvested barley seeds show dormancy that can make the germination test ineffective for an immediate evaluation. Therefore, the development of more efficient methods, such as the tetrazolium test, is necessary. The objective of this research work was to study various procedures for performing the tetrazolium test on barley seeds. Five lots of cv. BRS 195 barley seeds were used and subjected to the following treatments: two different methods of seed preconditioning (direct immersion in H2O and between sheets of moistened paper towels); two types of preparation for staining (longitudinal cross-section of the seed through the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hordeum vulgare; Germination; Dormancy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000100006

Assessment of the physiological potential of bell pepper seeds and relationship with seedling emergence
Provedor de dados: 95
Autores: Gagliardi,Bruna; Marcos Filho,Júlio.
The objective in this study was to verify the efficiency of different procedures for evaluating the physiological potential of bell pepper seed and identify its relationship with germination at different temperatures and with seedling emergence. Five seed lots each of the Reinger and Sentinel hybrids were used. Seed physiological potential was evaluated by germination, saturated salt accelerated aging (48 h/41 °C), seedling emergence (percentage and speed), and tetrazolium tests (preconditioning at 45 °C/3 h and seed staining at 45 °C/2 h). Germination (percentage and speed) on a thermogradient table at 15 °C, 18 °C, 21 °C, 25 °C and 30 °C was also evaluated the saturated salt accelerated aging and tetrazolium tests are suitable for access the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; Seed analysis; Germination; Vigor; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000100018

Use of densimetric table to improve the quality of commercial castor bean seeds
Provedor de dados: 95
Autores: Santos Neto,Antônio Lucrécio dos; Carvalho,Maria Laene Moreira de; Oliveira,João Almir; Fraga,Antônio Carlos; Souza,Ademária Aparecida de.
Castor bean fruits are already used for biodiesel production but obtaining quality seeds is still a challenge. Seed cleaning improves lot quality but little is known about the effects of upgrading castor bean seed lots on a densimetric table. The objective of this study was to evaluate the influence of cleaning castor bean seed lots on a densimetric table on their physical, physiological and sanitary characteristics. Two commercial lots of the AL Guarani 2002 cultivar, separated into five categories according to their classification on a densimetric table (uncleaned and low, low intermediate, high intermediate and high outlets), were evaluated. Tests for the yield, one-thousand seed weight, germination, seedling emergence, electrical conductivity and seed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L.; Cleaning; Germination; Vigor; Seed health.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000400004

X-Ray analysis to assess mechanical damage in sweet corn seeds
Provedor de dados: 95
Autores: Gomes Junior,Francisco Guilhien; Cicero,Silvio Moure.
The X-ray test is a precise, fast and non-destructive method to detect mechanical damage in seeds. In the present study, the efficiency of X-ray analysis in identifying the extent of mechanical damage in sweet corn seeds and its relationship with germination and vigor was evaluated. Hybrid 'SWB 551' (sh2) seeds with round (R) and flat (F) shapes were classified as large (L), medium (M1, M2 and M3) and small (S), using sieves with round and oblong screens. After artificial exposure to different levels of damage (0, 1, 3, 5 and 7 impacts), seeds were X-rayed (15 kV, 5 min) and submitted to germination (25 °C/5 days) and cold (10 °C/7 days) tests. Digital images of normal and abnormal seedlings and ungerminated seeds from germination and cold tests were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L; Image analysis; Germination; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000100010

Influence of disinfestation and osmotic conditioning on the germinating behavior of australian royal palm (Archontophoenix alexandrae)seeds
Provedor de dados: 95
Autores: Teixeira,Márcia Torres; Vieira,Henrique Duarte; Teixeira,Sílvio Lopes; Silva,Roberto Ferreira. da.
The technique of Osmotic Conditioning, which consists of partial and controlled hydration of the seeds, has obtained success with various species of seeds, increasing the germinating span and tolerance to the adverse conditions of the environment, and has also reduced the time elapsed between sowing and the emergence of the plants. Associated to ideal storage conditions, the treatment has increased the performance of the seeds of tropical wood species. Aiming at studying the germinating environment and the effect of osmotic conditioning on the germination of seeds of the Australian Royal Palm tree, two experiments were performed. The first one evaluated the effect of disinfestation of the seeds of the Australian Royal Palm tree with NaClO. The treatments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Sodium hypochlorite; Polyethylene glicol.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222007000100021

Desiccation tolerance of Tapirira obtusa seeds collected from different environments
Provedor de dados: 95
Autores: Pereira,Wilson Vicente Souza; Faria,José Márcio Rocha; Tonetti,Olivia Alvina Oliveira; Silva,Edvaldo Aparecido Amaral da.
This study was aimed at evaluating the desiccation sensitivity in seeds of the tree Tapirira obtusa (Benth.) J. D. Mitchell collected from three different environments and subjected to two distinct drying speeds. Seeds were collected from a rocky area, in the "Cerrado", and in a riparian forest area, in the region of municipality of Lavras, State of Minas Gerais. The seeds were subjected to drying with magnesium chloride (slow drying) or silica gel (fast drying), into closed environment, until moisture contents of 40%, 30%, 20% and 10%, considering as control, the percentage of germination at the initial moisture content in each environment, which varied from 47% to 50%. Percentages of germination and normal seedlings as well as germination speed index...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drying; Germination; Sensitivity; Dehydration.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300005

Quantitative characteristics of fruits and seeds of Pouteria pachycarpa Pires - Sapotaceae
Provedor de dados: 95
Autores: Cruz,Eniel David.
Pouteria pachycarpa is a tree species, found in the Brazilian Amazon and Bolivia whose wood has been exploited from the native forest. The present research describes the quantitative characteristics of fruits and seeds and quantifies the seed germination of this species. The fruit and seed color were characterized and measurements taken of the mass, length, diameter and number of seeds per fruit, the seed length, width and thickness, the germination percentage, abnormal seedlings and dead seeds. Sowing was carried out on a substrate containing sand and sawdust (1:1), in four replications of 50 seeds. The predominant fruit and seed colors were vivid yellowish orange (9YR) and dark grayish brown (6YR), respectively. Fruit mass, length and diameter ranged...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Goiabão; Physical characteristics; Germination.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222005000200023

Physiological quality evaluation of the radii Schinus terebinthifolius seeds
Provedor de dados: 95
Autores: Pacheco,Mauro Vasconcelos; Silva,Clarissa Santos da; Silveira,Tiago Madruga Telesca; Hölbig,Letícia dos Santos; Harter,Fábio Schaun; Villela,Francisco Amaral.
Schinus terebinthifolius is a native forest species which may be used in recuperating degraded areas and in urban afforestation. In order to evaluate the efficiency of methods for separating lots of S. terebinthifolius seeds into vigor levels, five lots of seeds were qualitatively evaluated for their moisture content, germination, first count, accelerated aging (the traditional and the saturated salt methods), germination speed index, average time of germination and seedling length and dry weight. The results showed that the tests of first germination count, accelerated aging at 41 ºC for 72 hours, average time of germination, seedling length and dry matter permitted the separation of S. terebinthifolius seeds into different vigor levels.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest species; Germination; Physiological potential.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000400018

Reserve mobilization during imbibition of stored Gliricidia sepium (Jacq.) Steud. (Leguminosae - Papilionoideae) seeds
Provedor de dados: 95
Autores: Reis,Renata Conduru Ribeiro; Dantas,Bárbara França; Castro,Renato Delmondez de; Antunes,Cimille Gabrielle Cardoso; Silva,Fabrício Francisco Santos da; Pelacani,Claudinéia Regina.
Gliricidia sepium is a drought-tolerant species, easily multiplied by seeds, and has been exploited by farmers as a source of forage in the semi-arid region of northeast Brazil. The objective of the present study was to evaluate the effect of seed storage on the mobilization of reserves during imbibition of "Gliricidia" seeds. Freshly-harvested seeds were packed in kraft paper bags and stored for three and six months in the laboratory under ambient conditions (25 º C ± 3 T and 75% ± 3 RH). Cotyledons were isolated from imbibed seeds and macerated for the extraction and quantification of total soluble sugars, reducing sugars, sucrose and starch, as well as of proteins, amino acids and for amylase activity. Storage under these conditions resulted in an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macromolecules; Longevity; Viability; Germination; Water content.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000300018

Effects of temperature and pre-germinative treatments on seed germination of Talinum triangulare (Jacq. ) willd (Portulacaceae)
Provedor de dados: 95
Autores: Brasileiro,Beatriz Gonçalves; Dias,Denise Cunha F. S.; Casali,Vicente Wagner Dias; Bhering,Maria Carmen; Cecon,Paulo Roberto.
The objective of this study was to evaluate the effects of temperature, substrate and pre-germinative treatments on T. triangulare seeds. Four temperatures (constant 20, 25, 30 °C and alternate 20-30 °C) and two types of seeding (on paper and between paper), with light, were evaluated. The pre-germinative treatments evaluated included: immersion in water (24 hours), immersion in 6% hypochlorite solution (1 hour), immersion in 0.2% potassium nitrate solution (24 hours), immersion in 0.05% gibberellin solution (24 hours) and the control (untreated seeds). The highest germination percentage was observed at the alternate temperatures of 20-30 ºC, but with no significant difference between the substrates at this temperature. Soaking seeds in KNO3 gave the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Substrate; Germination; Dormancy; Medicinal plant.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000400017

Physiological quality of coffee seeds produced under different levels of solar radiation and maturation stages
Provedor de dados: 95
Autores: Baliza,Danielle Pereira; Caixeta,Franciele; Pinho,Édila Vilela de Resende Von; Cunha,Rodrigo Luz da; Martins,Denize Carvalho; Rosa,Sttela Dellyzete Veiga Franco da.
In Brazil, although the coffee plantations are predominantly grown under full sunlight, the use of agroforestry systems can lead to socioeconomic advantages, thus providing a favorable environment to the crop by promoting its sustainability as well as environmental preservation. However, there is a lack of information on physiological quality of the coffee seeds produced under different levels of solar radiation. Within this context, the objective of this study was to evaluate the influence of different levels of solar radiation and maturation stages on the physiological quality of coffee (Coffea arabica L.) seeds, cv. Acaiá Cerrado MG-1474. Three levels of solar radiation (plants grown under full sunlight; under plastic screens of 35% shading; and under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Germination; Vigor; Isoenzymes.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300008

Management of consecutive cuts in the production and quality of wintergreen paspalum seeds
Provedor de dados: 96
Autores: Lopes,Rodrigo Ramos; Jaeschke Ost,Henrique; Souza,Cleber Henrique Lopes de; Franke,Lucia Brandão.
ABSTRACT The objective of this study was to evaluate the practice of consecutive cuts in the production and quality of Paspalum guenoarum seeds of the "Azulão" ecotype. The experimental design used was in completely randomized blocks with four replications. The treatment included three cuts in succession: zero cut, one cut, two cuts, and three cuts. The variables were: number of total tillers/plant; number of vegetative tillers/plant; number of reproductive tillers/plant; percentage of reproductive tillers; number of racemes/inflorescence; weight of thousand seeds; number of seeds/inflorescence; seed production; forage dry matter; water content of seeds; germination; first germination count; and germination speed index. The largest seed production was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flowering; Germination; Paspalum guenoarum; Tillering.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001000587

Relationships between Prosopis flexuosa (Fabaceae) and cattle in the Monte desert: Seeds, seedlings and saplings on cattle-use site classes
Provedor de dados: 97
Autores: CAMPOS,CLAUDIA M; CAMPOS,VALERIA E; MONGEAUD,ARNALDO; BORGHI,CARLOS E; DE LOS RÍOS,CLAUDIA; GIANNONI,STELLA M.
The fate of Prosopis flexuosa seeds dispersed by cattle is dependant on the spatial pattern of dung deposition and foraging movements. We hypothesised that cattle-use site classes explain the response variables related to seed input and fate of seeds, seedlings and saplings (small plants more than one year old). We defined sites with heavy cattle traffic ("trails" and "periphery of trails"), sites used for resting and foraging ("under Prosopis"), and sites where isolated individuals only walk ("under shrubs" and "bare soil"). Considering the established cattle-use site classes, our specific goals were to quantify and compare: (1) seeds transported in cattle dung; (2) seedlings 10 months after dung deposition; (3) established saplings; and (4) germinated...
Tipo: Journal article
Palavras-chave: Dung deposition; Endozoochory; Establishment; Germination; Seed input.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200013

Fire regimen and spread of plants naturalized in central Chile
Provedor de dados: 97
Autores: CONTRERAS,TOMÁS E; FIGUEROA,JAVIER A; ABARCA,LUIS; CASTRO,SERGIO A.
Setting fires is an old practice of land management in the Mediterranean region of central Chile. Fire in the region is currently of predominantly human origin and previously published material suggests that the scheduling of these activities is associated with the spread of naturalized exotic species. Research into the effects of fire on both native and exotic Mediterranean vegetation in central Chile has increased notably over recent years. The objective of our review is to highlight new knowledge in this area of research from the last 30 years and to contribute to systematization and an explicit conceptual model which takes into account the effect of a fire regimen on the spread of exotic plants and the mechanisms involved. We begin with analyses of the...
Tipo: Journal article
Palavras-chave: Central Chile; Exotic plant; Fire; Germination; Naturalized plant.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000300001

Banks of microscopic forms and survival to darkness of propagules and microscopic stages of macroalgae
Provedor de dados: 97
Autores: SANTELICES,BERNABÉ; AEDO,DIEGO; HOFFMANN,ALICIA.
Previous studies have found that the number of species conforming a bank of microscopic forms in tide pools in central Chile accounted only for half the number of species present in the macroscopic vegetation around the pools. An elemental condition for survival in these banks is the ability of microscopic forms to tolerate darkness or very low irradiances for extended periods. To test this ability, spores of 17 green, brown and red algal species, present and absent from the bank, were incubated at different combinations of irradiances and day lengths. Propagules of 47 % of the species tested (eight species) germinated in total darkness while the propagules of the other nine species germinated under conditions of very low irradiance (2-10 µmol m-2 s-1). In...
Tipo: Journal article
Palavras-chave: Benthic algae; Dark tolerance; Germination; Growth; Microscopic forms.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000300006

Physiological maturation in seeds of Lophantera lactescens Ducke
Provedor de dados: 124
Autores: Silva,Patrícia Cândido da Cruz; Alves,Edna Ursulino; Araújo,Luciana Rodrigues de; Cruz,José de Oliveira; Silva,Natália Cândido da Cruz.
ABSTRACT Lophantera lactescens Ducke (Malphigiaceae) is an arboreal plant that propagates by seed; once exclusive to the Amazon region, it is now widely distributed in South America. The aim of this work was to study the maturation process in seeds of L. lactescens, in order to determine the point of physiological maturity and the ideal time for harvesting. The field study was conducted at the Centre for Agrarian Sciences of the Federal University of Paraíba (CCA/UFPB), Campus II, in Areia, in the State of Paraíba (PB), where the fruit was harvested every two weeks over two consecutive years. The water content, external coloration, fruit size, fruit dry weight, germination and vigour (seed germination index, and seedling length and dry weight) were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Lanterneira; Maturity; Vigour.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200312

The use of X-ray to evaluate Brachiaria brizantha seeds quality during seed processing
Provedor de dados: 124
Autores: Jeromini,Tatiane Sanches; Martins,Cibele Chalita; Pereira,Francisco Elder Carlos Bezerra; Gomes Junior,Francisco Guilhien.
ABSTRACT The X-ray test permits the visualization of the internal structures of seeds in a non-destructive way making thus possible the diagnosis of causes of seed low germination and purity. The objective of this project was to evaluate the quality of Brachiaria brizantha seeds by means of the X-ray test and the effect of the processing stage. The seeds were sampled before processing and after going through the air and screen machine, and the first and the second gravity tables. Seeds were evaluated as to water content, purity, weight of a thousand seeds, germination, and the X-ray test. The treatment replications were distributed according to a complete random design with four replications. The X-ray test permit to verify the completely full seeds as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage grasses; Image analysis; Marandu; Germination.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300439

Morphological study of squash seeds at different stages of maturation through the use of X-ray
Provedor de dados: 124
Autores: Silva,Patricia Pereira da; Barros,Antonio Carlos Souza Albuquerque; Marcos Filho,Julio; Gomes Junior,Francisco Guilhien; Nascimento,Warley Marcos.
ABSTRACT Analysis of images has been recently used in order to both assess seed quality and elucidate some aspects of seed physiology, including X-ray tests and other resources. The objective of this study was to examine whether the X-ray may be successfully used to detect physical abnormalities, and relate their occurrence with physiological potential of tetsukabuto type squash seeds. Fruits were harvested at different maturation stages (15, 30, 45, 60 and 75 days after anthesis - DAA) and temporarily or not stored for 20 days. Seeds were radiographed using an intensity of 25 kV for 40 seconds and then germinated under alternating temperatures of 20-30 ºC. After four and eight days, percentages of normal and abnormal seedlings and dead seeds were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita maxima; Cucurbita moschata; Germination; Seed internal morphology.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300903

Maturation stages of fruit development and physiological seed quality in Physalis peruviana
Provedor de dados: 124
Autores: Sbrussi,Cesar Augustu Gasparetto; Zucareli,Claudemir; Prando,André Mateus; Silva,Bruna Vicentin de Almeida Barbosa da.
In fleshy fruits such as the Physalis, in which the seeds are the main form of propagation, there is disagreement about the appropriate physiological stage for harvesting in order to obtain high-quality seeds. The objective of this study was to determine the stage of maturation of Physalis peruviana, using the colouration of the fruit and calyx, and relative to the physical aspect of the fruit and the physiological aspect of the seeds. The following five stages of maturation were studied: green calyx and fruit (A); green calyx and yellow fruit (B); yellowish-green calyx and yellow fruit (C); straw-coloured calyx and yellow fruit (D); straw-brown calyx and intensely yellow fruit (E). Physical evaluations were determined using the diameter, length and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Uchuva; Germination; Exotic fruits; Climacteric.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000300015

Effects of processing phases on the quality of massai grass seeds
Provedor de dados: 124
Autores: Melo,Lilian Faria de; Martins,Cibele Chalita; Silva,Givanildo Zildo da; Pereira,Francisco Elder Carlos Bezerra; Jeromini,Tatiane Sanches.
ABSTRACT Massai grass is an important tropical forage grass. The harvested seeds upon being received by the company, are found to be contaminated with impurities which are removable by processing machines. This procedure is necessary to produce seeds of a quality level within standards established for commercialization and sowing purposes. The objective of this project was to evaluate the effects of processing phases on the physical and physiological quality of massai grass (Panicum maximum x P. infestum, cv. Massai) seeds for commercialization purposes. Seeds were sampled before processing and after leaving the air and screen machine (upper and intermediary screens and bottom); first gravity table (drift, upper and intermediate spouts); treating machine;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Panicum maximum; Germination; Vigor; Purity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200259

Physiological quality of sesame seeds during storage
Provedor de dados: 124
Autores: Lima,Denise de Castro; Dutra,Alek Sandro; Camilo,Juliana de Mesquita.
Sesame (Sesamum indicum L.) is one of the oldest oilseed plants used by man, and has great economic potential due to the possibilities for its exploitation in both the domestic and international markets. The objective of this work was to monitor the viability of sesame seeds stored in different environments and packaging, with a view to their conservation. The seeds were packed into paper bags, multiwall paper, black polyethylene and PETE bottles, and stored for a period of 12 months in different environments: dry cold room (10 °C and 55% RH), natural environment (30-32 °C and 75% RH), refrigerator (4 °C and 38-43% RH) and freezer (-20 °C). Every three months the water content of the seeds was determined and germination, accelerated ageing, speed of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Storage; Germination; Conservation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100017

Cryopreservation of seeds of Encholirium spectabile Martius ex Schultes f. by the vitrification method
Provedor de dados: 124
Autores: Ferrari,Edilene Aparecida Preti; Colombo,Ronan Carlos; Faria,Ricardo Tadeu de; Takane,Roberto Jun.
ABSTRACT The bromeliad Encholirium spectabile Martius ex Schultes f. is a endemic species of the Caatinga. The aim of this study was to evaluate the efficiencies of cryoprotectant in bromeliad seeds. The treatments consisted of immersing seeds in different cryoprotectant solutions and vitrification solutions before immersion in liquid nitrogen (NL) at -196 °C, as the following treatments: T1- Control: without cryoprotectants; T2- glycerol 2M (20 min) + PVS2 (10 min), T3- glycerol 2M (20 min) + PVS2 with phloroglucinol 1% (10 min), T4- sucrose 0.4M (20 min) + PVS2 (10 min); T5- sucrose 0.4M (20 min) + PVS2 with phloroglucinol 1% (10 min); T6- glycerol 2M (20 min) + sucrose 0.4M (20 min) + PVS2 (10 min), T7- glycerol 2M (20 min) + sucrose 0.4M (20 min) +...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromeliaceae; Conservation; Germination; Liquid nitrogen.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100172

The effect of fruit maturity on the physiological quality and conservation of Jatropha curcas seeds
Provedor de dados: 124
Autores: Silva,Laércio Junio da; Dias,Denise Cunha Fernandes dos Santos; Oliveira,Glauter Lima; Silva Júnior,Rubens Alves da.
ABSTRACT The aim of this study was to evaluate the effect of fruit maturation stage on the physiological quality of J. curcas seeds during storage. Thus, seeds were extracted from fruits harvested at different maturity stages based on external color, i.e., yellow, yellow-brown and brown (dry fruits). After natural drying, the seeds were packed in Kraft paper bag and stored for 18 months at laboratory environment. Initially and every three months, the seeds were evaluated for moisture content, germination, first count of germination, accelerated aging, cold test, electrical conductivity and emergence. There was reduction in seed physiological quality, with decrease in germination and vigor, especially after nine months of storage. The seeds extracted from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Vigor; Storage; Seed deterioration.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300487

Maturation of Physalis peruviana L. seeds according to flowering and age of the fruit
Provedor de dados: 124
Autores: Diniz,Fábio Oliveira; Novembre,Ana Dionisia da Luz Coelho.
ABSTRACT It is important to understand the seed maturation process to determine the time point at which the seeds achieve optimum quality and the ideal time for harvest. This study aimed to study the maturation of Physalis peruviana L. seeds, based on flowering time and age of the fruit. This study was conducted from March to October of 2016 and 2017, in the city of Piracicaba, São Paulo. The plants were cultivated in four blocks using four stems, with spacing of 1.0 m between the plants and of 2.5 m between the rows. As experimental treatments, two flowering time points were defined: 55 and 105 days after transplanting (DAT); in each period, the flowers were marked at the anthesis and the respective fruits and seeds were evaluated at 45, 60, 75, and 90...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cape gooseberry; Physiological maturity; Germination; Anthesis; Harvest.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300447

Accelerated ageing test to evaluate vigour in Jatropha curcas L. seeds
Provedor de dados: 124
Autores: Oliveira,Glauter Lima; Dias,Luiz Antônio dos Santos; Dias,Denise Cunha Fernandes dos Santos; Soares,Marcos Morais; Silva,Laércio Junio da.
There is currently great interest in the cultivation of the Jatropha curcas L., known locally as physic nut, for the production of biodiesel, leading to an increase in the demand for seeds and precise information as to their physiological quality, especially vigour. The objective was to evaluate the efficiency of the accelerated ageing test, with variations, in verifying the vigour of Jatropha seeds. Four seed lots were initially characterized as to their physiological quality by germination and vigour tests. For accelerated ageing test, temperatures of 42 and 45 ºC were tested during 48, 72 and 96 hours. The experiment was carried out in a completely randomized design and the averages of the treatments compared by Tukey test (p&lt;0,05). The Pearson...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological quality; Germination; Physic nut.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100015

Physiological quality of seeds of white oat cultivars in response to trinexapac-ethyl application
Provedor de dados: 124
Autores: Bazzo,José Henrique Bizzarri; Barbosa,André Prechlak; Cardoso,Carolina Pereira; Zucareli,Claudemir; Fonseca,Inês Cristina de Batista.
ABSTRACT The aim of this study was to assess the effect of the growth retardant trinexapac-ethyl on the physiological quality of seeds of different grain white oat cultivars in two growing environments. The experiments were carried out in Londrina and Mauá da Serra, Paraná State, Brazil. The experimental design was a randomized block design in a 4 × 2 factorial scheme with four replications. Treatments consisted of four white oat cultivars (IPR Afrodite, IPR Artemis, URS Corona, and URS Guria), with and without growth retardant application. Trinexapac-ethyl was applied by foliar spraying in a dose of 125 g a.i. ha−1 at the stem elongation stage between the first and second perceptible node. The following parameters were assessed: germination, first...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena sativa L.; Growth retardant; Physiological potential; Vigor; Germination.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400636

Physiological quality of sesame seeds produced from plants subjected to water stress
Provedor de dados: 124
Autores: Silva,Ronimeire Torres da; Oliveira,Alexandre Bosco de; Lopes,Maria de Fátima de Queiroz; Guimarães,Marcelo de Almeida; Dutra,Alek Sandro.
ABSTRACT Germination and seed vigor may be influenced by several factors, such as water stress during production, which affect crops differently according to the phenological stage of the plant. The aim of this study therefore was to evaluate the physiological quality of sesame seeds from plants subjected to water stress at different phenological stages. To this end, sesame plants were subjected to water stress at the following stages: I - germination to the start of vegetative growth (T1); II - vegetative growth to flowering (T2); III - flowering to pod formation (T3); IV - fruit maturation (T4); also for stress at all stages (T5) and full irrigation (T6). By weighing and daily irrigation of the containers, levels were kept at 50% of pot capacity (CV) for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sesamum indicum L; Water deficit; Phenology; Germination; Gas exchange.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000400643

Physiological maturity of Physalis angulata L. seeds
Provedor de dados: 124
Autores: Santiago,Willen Ramos; Gama,Juliana Simões Nobre; Torres,Salvador Barros; Bacchetta,Gianluigi.
ABSTRACT Determination of seed physiological maturity allows predicting the most appropriate time for harvest, aiming to obtain seeds with high physiological potential. Physalis angulata (Solanaceae) has pharmacological and agro-industrial potential, but there is little information on its reproductive phenology. Thus, this study aimed to evaluate the physiological maturity of P. angulata seeds according to fruit age. Fruits were harvested at 7, 14, 21, 28 and 35 days after anthesis (DAA) and the following evaluations were conducted: fruit weight and diameter, seed moisture content, 100-seed dry weight, 1000-seed weight, electrical conductivity, germination, germination first count, emergence, and seedling dry weight and length. The experimental design was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanaceae; Anthesis; Harvest; Germination; Physiological potential.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300431

The morphological characterization of the dry seeds and reserve mobilization during germination in Morinda citrifolia L.
Provedor de dados: 124
Autores: Paula,Stelamaris de Oliveira; Sousa,João Alencar de; Brito,Edy Sousa de; Gallão,Maria Izabel.
ABSTRACT Information about the morphology, chemical composition and reserve mobilization is important in understanding the establishment of native and exotic species. The purpose of this study was to describe the morphology, chemical composition, and mobilization of reserves during germination of noni (Morinda citrifolia L.). Biometric and morphological analyzes were performed with 100 randomly selected dried seeds. Other seeds were treated with sulfuric acid PA and soaked in Petri dishes. Collected seeds of five different times of germination were used for cytochemical and chemical analysis. For cytochemical analysis, the cuts of 5μm were submitted to dyes TB at pH 4.0; XP at pH 2.5, reaction of PAS and Sudan IV. The seeds were crushed for chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytochemical; Lipids; Fatty acids; Proteins; Germination.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300556

Physiological potential of sorghum seeds under discontinuous hydration and water deficiency conditions
Provedor de dados: 124
Autores: Sarmento,Erivanessa Costa Sousa; Oliveira,Fernando Sarmento de; Cabral,Felipe Augusto Sombra; Oliveira,Daniel Farias; Dutra,Alek Sandro.
ABSTRACT Hydration and dehydration cycles during imbibition of seeds may influence their physiological performance, making them more vigorous and resistant to abiotic factors such as water stress. The aim was to investigate whether the times and discontinued hydration cycles condition higher tolerance to water deficiency conditions in germination and seed vigor and accumulation of organic compounds in sorghum seedlings. The experiment was carried out in a randomized experimental design with four replicates of 50 seeds. The treatments were arranged in a 3 × 4 × 6 factorial scheme (hydration times, hydration and dehydration cycles, osmotic potentials). The imbibition curve of the species was determined based on three times (X, Y and Z); and the dehydration...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Sorghum Bicolor; Water Memory; Water Stress; Vigor.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400411

ALLELOPATHIC EFFECT OF Tephrosia cinerea L. (Pers.) PLANT EXTRACTS IN LETTUCE
Provedor de dados: 107
Autores: de La Salles, Ana Yasha Ferreira; Souto, Jacob Silva; Borges, César Henrique Alves; Alencar, Lyanne dos Santos; Moreira, Francisco Tibério de Alencar.
Allelopathy has been conceptualized as the direct or indirect effect of a plant onto another one through secondary metabolites, or allelochemicals spread in the environment, with the power to interfere in seed germination and increase or inhibit the development of neighboring plants. The objective of this study was to analyze the possible allelopathic effects of aqueous extracts of Tephrosia cinerea in the germination of lettuce (Lactuca sativa L.) seeds. The experiment has been carried out at the Laboratório de Nutrição Mineral de Plantas (Laboratory of Plant Mineral Nutrition)/UAEF/UFCG in Patos (state of Paraíba). We collected T. cinerea organisms, having separated the stem, leaves, roots fractions and the aerial part of the plant + roots, having...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alelopatia  engenharia florestal Allelopathy; Neighboring Plant; Germination.
Ano: 2016
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/676

Crioconservação de sementes de seis acessos de maracujazeiro
Provedor de dados: 22
Autores: L. M.M Meletti; Instituto Agronômico de Campinas (IAC); W. Barbosa; Instituto Agronômico de Campinas (IAC); R. F.A. Veiga; Pesquisador Científico, Instituto Agronômico de Campinas (IAC); R. Pio; Unioeste.
A crioconserva&amp;ccedil;&amp;atilde;o em nitrog&amp;ecirc;nio l&amp;iacute;quido transformou-se numa alternativa interessante e oportuna para a conserva&amp;ccedil;&amp;atilde;o de germoplasma vegetal. Neste trabalho pesquisou-se a conserva&amp;ccedil;&amp;atilde;o de sementes de maracujazeiro sob dois ambientes: laborat&amp;oacute;rio (25&amp;ordm;C) e nitrog&amp;ecirc;nio l&amp;iacute;quido (-196&amp;ordm;C). Utilizaram-se sementes, com variados teores de umidade, dos seguintes acessos do Banco Ativo de Germoplasma-Passiflora do IAC: Passiflora serrato-digitata L., P. nitida Kunth. e quatro gen&amp;oacute;tipos de P. edulis Sims. (maracuj&amp;aacute;s amarelo, roxo, rosa-ma&amp;ccedil;&amp;atilde; e roxinho-mi&amp;uacute;do). Uma parte das sementes foi...
Tipo: Artigo Avaliado por Pares
Palavras-chave: ; Conservação; Germinação; Nitrogênio líquido; Passion fruit; Conservation; Germination; Liquid nitrogen.
Ano: 2009
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/2036

Differentiation of the entomopathogenic fungus Metarhizium flavoviride (Hyphomycetes)
Provedor de dados: 59
Autores: Xavier-Santos,Solange; Magalhães,Bonifácio; Lima,Elza A. Luna-Alves.
The differentiation of a Brazilian isolate of Metarhizium flavoviride (CG 423), a promising candidate for the biocontrol of grasshoppers, was investigated. Conidia were spread onto solid medium (1% yeast extract, 2.8% agar, 96.2% distilled water), incubated at 28°C and observed during 26 h. Germination initiated as conidia size increased from 5.3 (±0.6) x 3.1 (±0.3) µm (0 h incubation) to 8.1 (±0.2) x 6.1 (±0.2) µm (8 h incubation). Germ tubes started to appear after 10 h incubation showing a high degree of multipolarity. Twenty six hours after inoculation, hyphal differentiation and anastomosis among hyphae from adjacent conidia were recorded. Appressoria were formed only from conidia incubated in liquid medium containing minimum concentration of yeast...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Hyphomycetes; Entomopathogenic fungus; Germination; Appressorium.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000100009

Seed germination and seedling development of white oat affected by silicon and phosphorus fertilization
Provedor de dados: 63
Autores: Toledo,Mariana Zampar; Garcia,Rodrigo Arroyo; Merlin,Alexandre; Fernandes,Dirceu Maximino.
Silicon (Si) fertilizers have been increasingly used in agriculture due to several benefits as acidity correction in tropical soils and positive effects on the development of grasses. Nutrient availability and plant nutrition play an important role in seed production and may affect the physiological quality of white oat seeds. The present study had as objective to evaluate seed germination and seedling development of white oat (Avena sativa L.) affected by silicon and phosphorus fertilization. The experimental design was the completely randomized, analyzed as a factorial 2 x 4, with six replications. Treatments consisted of 20 and 200 mg dm-3 of P2O5, applied as triple superphosphate, combined with 0, 150, 300 and 450 mg dm-3 of Si, as potassium silicate....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena sativa L; Germination; Vigor; Plant nutrition.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100003

Sowing seasons and quality of soybean seeds
Provedor de dados: 63
Autores: Ávila,Marizangela Rizzatti; Braccini,Alessandro de Lucca e; Motta,Ivo de Sá; Scapim,Carlos Alberto; Braccini,Maria do Carmo Lana.
Considering the difficulties of producing high quality soybean [Glycine max (L.) Merrill] seeds during the traditional cropping period in some areas of the State of Paraná, Brazil, a research project was carried out with the objective of evaluating the influence of sowing dates on the physiological and sanitary quality of seeds, during the 1998/99 and 1999/00 cropping seasons, in Maringá, PR, Brazil. The experiment consisted of five cultivar competition assays, arranged in a completely randomized block design, with each assay sown at different dates (10/15, 10/30, 11/15, 11/30 and 12/15) for each cropping season. The evaluated cultivars were BRS 132 (early), BRS 133 (semi-early), BR 16 (semi-early), BRS 134 (intermediate) and FT- Estrela (late). Seeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cropping; Cultivar; Germination; Health.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200007

Response of seeds and pollen of Onobrychis viciifolia and Onobrychis oxyodonta var. armena to NaCl stress
Provedor de dados: 63
Autores: Beyaz,Ramazan; Kaya,Gamze; Cocu,Sati; Sancak,Cengiz.
Sainfoin (Onobrychis viciifolia Scop.) is an important forage legume crop with 52 species adapted to dry and poor soils in Turkey, but little is known about the effects of salinity on germination and seedling growth in arid and semiarid regions suffering from salinity problem. The seeds and pollen of two species of sainfoin O. viciifolia and O. oxyodonta var. armena (Syn: O. armena) were exposed to 0, 5, 10, 20 and 30 dS m-1 of NaCl under in vivo and in vitro conditions and evaluated for germination under salt stress by comparing germination percentage, mean germination time, root and shoot length, fresh and dry seedling weight and dry matter. Increased salinity levels generally resulted in decrease in all traits except time to germination, dry seedling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: In vivo; In vitro; Sainfoin; Salinity; Germination.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400013

Identification of geneticaly modified soybean seeds resistant to glyphosate
Provedor de dados: 63
Autores: Tillmann,Maria Ângela André; West,Shirlie.
Advances in genetic engineering permit the modification of plants to be tolerant to certain herbicides that are usually not selective. For practical and commercial purposes, it is important to be able to detect the presence or absence of these traits in genotypes. The objective of this research was to develop a procedure for identifying genetically modified soybean (Glycine max L. Merr.) with resistance to the herbicide glyphosate. Two studies were conducted based on germination test. In the first study, soybean seeds were pre-imbibed in paper towel with the herbicide solutions, then transferred to moist paper towel for the germination test. In the second study, seeds were placed directly in herbicide solutions in plastic cups and tested for germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Transgenic; Germination; Detection; Glyphosate.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300017

Preventing thermoinhibition in a thermosensitive lettuce genotype by seed imbibition at low temperature
Provedor de dados: 63
Autores: Nascimento,Warley Marcos.
Lettuce (Lactuca sativa L.) seed germination is strongly temperature dependent and under high temperatures, germination of most of genotypes can be erratic or completely inhibited. Lettuce seeds of 'Dark Green Boston' (DGB) were incubated at temperatures ranging from 15° to 35°C at light and dark conditions. Other seeds were imbibed in dark at 20°; 25°; 30°; and 35°C for 8 and 16 hours and then transferred to 20 or 35°C, in dark. Seeds were also incubated at constant temperature of 20° and 35 °C, in the dark, as control. In another treatment, seeds were primed for 3 days at 15°C with constant light. DGB lettuce seeds required light to germinate adequately at temperatures above 25°C. Seeds incubated at 20°C had 97% germination, whereas seeds incubated at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Dormancy; Seed priming; Stand establishment.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300010

Bioregulator application, agronomic efficiency, and quality of soybean seeds
Provedor de dados: 63
Autores: Ávila,Marizangela Rizzatti; Braccini,Alessandro de Lucca e; Scapim,Carlos Alberto; Albrecht,Leandro Paiola; Tonin,Telmo Antônio; Stülp,Marcibela.
The application of vegetal bioregulators has shown promising results, mainly in cultures that have already reached a high level of technology. Based on this context an experiment was carried out with the objective of evaluating agronomic traits of plants, such as yield and quality of seeds, produced by applying bioregulators to a soybean crop. For this purpose, the following treatments were carried out: before sowing - seed treatment (25, 50 and 75 mL for 100 kg-1 seeds); during sowing time - spraying on the sowing lines (pulverization onto the sowing lines) (50, 100 and 150 mL ha-1); between stages V5 and V6 (25, 50 and 75 mL ha-1); and the control - no treatment. Emergence speed, final seedling emergence, number of pods and seeds per plant, average...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth regulator; Yield; Vigor; Germination.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600006

Reproductive biology and early establishment of Pinus elliottii var. elliottii in Brazilian sandy coastal plain vegetation: implications for biological invasion
Provedor de dados: 63
Autores: Bechara,Fernando Campanhã; Reis,Ademir; Bourscheid,Kurt; Vieira,Neide Koehntopp; Trentin,Bruna Elisa.
Pinus is the most invasive woody taxon, exceeded only by herbaceous plants. This study reports the reproductive biology and early establishment of Pinus elliottii Engelm. var. elliottii, describing its invasive properties in a protected natural area of the Brazilian coastal sandy plains. We evaluated the seed germination and rain, longevity of seed viability and the initial dynamics of the seedlings of Pinus elliottii var elliottii through field and laboratory experiments. We recorded a continuous seed rain of about 204.0 viable seeds m- 2 per year, with a 90 % germination rate. The seeds exhibited a low longevity of viability in the soil and a dense, permanent seedling bank that may explain the high levels of pine invasion. The environmental impact caused...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Slash pine; Germination; Seed bank; Seed rain; Seedling dynamics.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000200005

Practical method for germination of Araucaria angustifolia (Bert.) O. Ktze. seeds
Provedor de dados: 63
Autores: Moreira-Souza,Milene; Cardoso,Elke Jurandy Bran Nogueira.
The germination of seeds of Araucaria angustifolia (Brazilian Pine) is generally a slow and fastidious process that causes loss of many seeds because of the incidence of pathogens. The objective of this study was to evaluate whether seeds with cut edges present greater germination percentages or precocity when compared to untreated, normal seeds. The experimental design was completely randomized design with 100 pre-cut and 100 non-treated seeds. The experiment was installed twice, in 1998 and 1999, from fresh seeds. Pre-cut seed germination was higher: 92 and 95% respectively, whereas whole seed germination was 60 and 64% in the two experiments. Seedlings originated from pre-cut seeds were uniform and showed less fungal contaminants.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria angustifolia; Germination; Seeds.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200025

Limit between stages I and II of a seed imbibition curve
Provedor de dados: 63
Autores: Pinho,Sheila Zambello de; Carvalho,Lídia Raquel de; Delachiave,Maria Elena Aparecida.
A knowledge of the imbibition stages shown by different species, is essential in research projects aiming at improvement of seed quality by treatments such as osmotic conditioning, initial wetting, and the use of bioregulators. The objective of this study was to establish a methodology to determine the limit between the first and second stages of the process, considering the model W = f(t) - (a - w0)exp(-kt), using statistical tests. This limit was determined using an asymptotic distribution of an estimator function. The data point beyond which the difference (W*) is no longer significant was determined using Student's T statistics. The model is &lt;img border=0 id="_x0000_i1026" src="../../../img/revistas/sa/v61n1/a03img01.gif" align=absmiddle &gt; or =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water absorption; Non-linear regression; Germination.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100003

Millet seeds mixed with phosphate fertilizers
Provedor de dados: 63
Autores: Soratto,Rogério Peres; Lima,Eduardo do Valle; Mauad,Munir; Villas Boas,Roberto Lyra; Nakagawa,João.
The small size of millet seeds is the main cause for lack of uniformity at sowing, especially because most farmers do not have appropriate seeders. Mixing seeds and phosphate fertilizers would improve seeding, resulting in a better crop stand. To study the effects of such mixture on the physiological quality of seeds, millet seeds were mixed with single superphosphate or triple superphosphate (1 kg of seeds: 2.5 kg of fertilizer), and stored in plastic bags for 0, 6, 12, 24, 48, 72, 96 and 120 hours before sowing, under laboratory conditions. After storage, seeds were separated and their moisture and electrical conductivity were determined. Seeds were then submitted to germination test under laboratory conditions. Seeds mixed with fertilizer and non-mixed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pennisetum glaucum; Germination; Vigor; Single superphosphate; Triple superphosphate.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300024

Relationship between nitrogen sources, germination and vigor of soybean seeds
Provedor de dados: 63
Autores: Marcos-Filho,J.; Custodio,C.C.; Camara,G.M.S.; Marcos,E.A.; Miranda,R.E.
This research was conducted in two experimental areas; the first had been under cultivation with Bradyrhizobium japonicum anually inoculated for several years and the second was cultivated with sugarcane for many years receiving only mineral fertilization. Mineral nitrogen (urea and ammonium) effect was compared with the effects of inoculant treatments (liquid and peat carriers) on plant development, yield and seed quality. After harvesting, seeds were stored under normal environmental conditions and tested periodically. Germination, accelerated aging, electrical conductivity and seedling emergence tests showed that seeds coming from the area where inoculation was practiced have better quality. Best plant performance regarding plant height at different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Seeds; Inoculation; Germination; Vigor.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000200017

Drying and storage of Eugenia involucrata DC. seeds
Provedor de dados: 63
Autores: Maluf,Angela Maria; Bilia,Denise Augusta Camargo; Barbedo,Claudio José.
The physiological quality of seeds of native species is important to produce healthy saplings and therefore guarantee the success of programs to recover disturbed vegetation. This reinforces the necessity for investigating the physiological quality of those seeds. To evaluate the effects of different drying rates on the germination, moisture content and storability of Eugenia involucrata diaspores, mature fruits collected at Mogi Guaçu, SP, Brazil had their epi- and mesocarps removed by washing and were dried at 30, 40 or 50ºC until their water content was reduced from 57% (fresh diaspores) to 13% (final drying), totaling six drying levels. In a second experiment, diaspores had their moisture content reduced from 57% to 49%, at 30ºC, totaling six drying...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Drying rate; Recalcitrant seed.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300009

Compatibility of conventional agrochemicals used in rice crops with the entomopathogenic fungus Metarhizium anisopliae
Provedor de dados: 63
Autores: Silva,Rodrigo Alves da; Quintela,Eliane Dias; Mascarin,Gabriel Moura; Barrigossi,José Alexandre Freitas; Lião,Luciano Moraes.
The toxicological impact of chemical pesticides on fungal entomopathogens and their use in tank-mixing can be directly measured through in vitro compatibility tests. This study reports the in vitro toxicity of eight insecticides, four fungicides and five herbicides in the conidial germination, vegetative growth and conidiation of Metarhizium anisopliae (strain CG 168). A conidial suspension containing the pesticide at recommended field dosage was subjected to constant agitation in a rotary shaker for 3h to simulate a tank mixing. Then, aliquots of each suspension were used to determine conidial germination, vegetative growth and conidiation on potato dextrose agar (PDA). The fungicides difenoconazole (69 mL ha-1), propiconazole (75 mL ha-1),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pesticide compatibility; Conidiation; Entomopathogenic fungi; Germination; Vegetative growth.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000300003

Muskmelon seed priming in relation to seed vigor
Provedor de dados: 63
Autores: Nascimento,Warley Marcos; Aragão,Fernando Antônio Souza de.
A number of important factors may affect seed priming response, including seed quality. Effects of seed vigor on seed priming response were investigated using seed lots of two muskmelon (Cucumis melo L.) cultivars. Seeds of muskmelon, cvs. Mission and Top Net SR were artificially aged at 43°C for 0, 20 and 40 hours. Seeds were primed for six days in darkness at 25°C in KNO3 (0.35 mol L-1) aerated solution. Aged seeds germinated poorly at 17°C. Priming increased germination rate at 17 and 25°C and germination percentage at 17°C. An interaction effect on germination performance between vigor and priming was observed, especially at low temperature. Priming increased germination performance in seeds of low vigor, and the response was cultivar dependent.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Osmoconditioning; Cultivars; Stand establishment.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100019

Relationship of black layer and milk line development on maize seed maturity
Provedor de dados: 63
Autores: Vieira,R.D.; Minohara,L.; Carvalho,N.M. de; Bergamaschi,M.C.M.
The relationship of black layer and milk line development on maize seed maturity was evaluated under tropical conditions. Seed moisture (g.kg-1), standard germination - SG (7 days, 25°C), and vigor, using accelerated aging-AA (96 hours, 42°C and 100% of RH), cold test-CT only in 1991/92 (7 days at 10°C and 7 days at 25°C) and electrical conductivity-EC (four 50-seed samples, 24 hours imbibition at 25°C) and milk line and black layer formation (using a five-stage rating system) were determined at 3 to 4 days intervals, using two genotypes (hybrid CX 133 and variety IAC 100) during the crop seasons of 1990/91 and 1991/92. The results showed that physiological maturity was reached before stage 4, based on seed germination and vigor (AA and CT) values, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Vigor; Accelerated aging; Cold test; Electrical conductivity.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000100023

การใช้เม็ดดูดความชื้นซีโอไลท์ในการลดความชื้นของเมล็ดพันธุ์ข้าว
Provedor de dados: 106
Autores: Porntip Thavong; Suwat Saimaya; Adoul Intaraprasert.
Seed drying to suitable moisture content during harvesting immediately and storage is a key factor to maintain a long-shelf life.  The purpose of this research was to use the zeolite drying beads to dry rice seeds var. Phitsanulok 2 (PSL2) and Ayutthaya 1 (AYT1) to target moisture content at 6 % and 12 %.  Three experiments were carried out at Prachinburi Rice Research Center during April 2012- January 2013.  Rice seeds with the different initial moisture content were blended with three beads to seed ratios at 30oC, 40oC and ambient temperature.  The results revealed that rice seed moisture content could be reduced to the target moisture content which depended on variety, initial moisture content, the bead-to-seed ratio, drying temperature and drying...
Tipo: PhysicalObject
Palavras-chave: Rice seed; Phitsanulok 2 variety; PSL2; Ayutthaya 1 variety; AYT1; Desiccant substance; Drying bead; Rice seed drying; Rice seed storage; Zeolite; Germination; Prachin Buri Rice Research Center; เมล็ดพันธุ์ข้าว; พันธุ์พิษณุโลก 2; พันธุ์อยุธยา 1; เม็ดดูดความชื้น; สารดูดความชื้น; การลดความชื้น; การเก็บรักษาเมล็ดพันธุ์ข้าว; ซีโอไลท์; ประสิทธิภาพดูดซับความชื้น; อายุการเก็บรักษา; อัตราการงอก; ศูนย์วิจัยข้าวปราจีนบุรี.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5708

การงอกและการเจริญเติบโตของเอมบริโอพืชในสกุล Prunus ที่ยังพัฒนาไม่เต็มที่โดยวิธีการเพาะเลี้ยงเอมบริโอ
Provedor de dados: 106
Autores: Nonglak Jeengool.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Peach; Prunus persica; Nectarine; Plum; Prunus domestica; Plant; Genus Prunus; Embryo; Germination; Growth; Embryo culture technique; Culture media; Woody plant medium; WPM; Brooks and Hough; BH; พีช; เนคทารีน; พลัม; พืช; เอมบริโอ; การงอก; การเจริญเติบโต; การเพาะเลี้ยงเอมบริโอ; อาหารเพาะเลี้ยง; สูตรอาหาร.
Ano: 2003
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5477

Progress report on agricultural experiments in 1981/82 dry season
Provedor de dados: 106
Autores: Sakamoto, Haruhiko; Somrak Noradechanon.
4 ill., 3 tables
Palavras-chave: Corn; Maize; Sorghum; Intensive irrigation; Tasseling period; Pollination period; Seed storage; Germination; Yields; Quality; Agronomic characters; ข้าวโพด; ข้าวฟ่าง; การให้น้ำ; ความงอก; การเก็บรักษาเมล็ดพันธุ์.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4065

การยืดอายุการเก็บรักษาเมล็ดพันธุ์หลักในสภาพควบคุมอากาศและความชื้น
Provedor de dados: 106
Autores: Orak Thongdej; Anchalee Prasertsak.
Storage is a major problem for foundation seed production. Occasionally, deterioration occurred before planting time and low germination was shown. The experiment on extending storability of foundation seed in hermatic condition was conducted in Phatthalung Rice Research Center between May 2011 – April 2014. The two varieties; Chiang Phatthalung and Phitsanulok 2 were used in this experiment. Seed moisture content of approximate 10 tons in each variety was reduced to 10.44 and 11.24% in Chiang Phatthalung and Phitsanulok 2, respectively. Seeds were then put in plastic bag and stored in hermatic condition (cocoon) compared to normal storage (control). It was found that Chiang Phatthalung and Phitsanulok 2 stored in cocoon showed 90 and 96% germination...
Tipo: Collection
Palavras-chave: Seed; Seed quality; Deterioration; Storage; Hermatic condition; Germination; เมล็ดพันธุ์    การเก็บรักษาเมล็ดพันธุ์แบบปิดสนิท; คุณภาพเมล็ดพันธุ์; การเสื่อมคุณภาพเมล็ดพันธุ์; การเก็บรักษาเมล็ดพันธุ์; การเก็บรักษาเมล็ดพันธุ์แบบปิดสนิท; ความงอก.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5887

วิธีการใช้ Streptomyces-PR87 ในการส่งเสริมการเจริญเติบโตของมะเขือเทศ
Provedor de dados: 106
Autores: Assiri Klangsawad; Petcharat Thummabenjapone.
Using plant growth promoting microbes is an alternative approach for reducing cost and enhancing good health of crop plants. This research aims to establish the application protocol for enhance growth of tomato at seedling and transplanting stages by antagonistic Streptomyces-PR87 which will be applied further to farmer. The experiments were carried out using two varieties of tomato, e.g. var.Sida and var.Tomato32. In seedling stage, the experiments were carried out in combinations with Streptomyces-PR87 concentration at OD600=0.2, 1 and 5 and drenching interval at 3, 5 or 7 days, and seed soaking for 24 hours before sowing or directly drenching after seed sowing methods. The results showed that the most appropriated method for enhance growth and...
Tipo: PhysicalObject
Palavras-chave: Organic tomato; Microorganism; Biofertilizer; Actinomycetes; Growth promote; Bioregulators; Plant disease control; Germination; Streptomyces-PR87; มะเขือเทศ; เชื้อจุลินทรีย์; การส่งเสริมการเจริญเติบโต; ปุ๋ยชีวภาพ; แอคติโนมัยซีส; เชื้อแบคทีเรียปฏิปักษ์; สารควบคุมการเจริญเติบโต; การควบคุมโรค; การงอก; ความยาวของราก; ความสูงของลำต้น; การปลูกพืชอินทรีย์.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5785

Hentriacontane: a leaf hydrocarbon from Syzygium jambos with stimulatory effects on the germination of urediniospores of Puccinia psidii
Provedor de dados: 102
Autores: TESSMANN,DAURI J.; DIANESE,JOSÉ C.
A crude Sohxlet extract from leaves of Syzygium jambos was sequentially fractionated using a silica gel flash column. A bioassay based on the numbers of urediniospores of Puccinia psidii that germinated in 2% water agar detected an active stimulant of germination when the fraction eluted with 100% n-hexane was used. The active fraction induced up to 88% increase in germination when added to a spore suspension in mineral oil. The active fraction was characterized as a hydrocarbon by ¹H nuclear magnetic resonance, 13C nuclear magnetic resonance, and infrared analysis. Gas chromatography-mass spectrometry analysis indicated that the fraction was a long-chain 436 MW hydrocarbon with corresponding to C31H64, namely hentriacontane. This is the first time such a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Myrtaceae; Rust; Urediniospores; Fungal spore germination.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000500017

Carbonized rice husk as an alternative substrate for Ocimum basilicum L. seedling production
Provedor de dados: 109
Autores: Salé,Mussa Mamudo; Pereira,Aline Soares; Lange Junior,Hélio; Neutzling,Cristiane; Marques dos Santos,Patricia; Schiedeck,Gustavo; Severo Dorneles,Athos Odin.
Abstract The substrate used in seedling production plays a major role in the initial plant development. In this sense, the objective was to evaluate the emergence capacity and establishment of basil seedlings in different proportions of alternative substrates based on charred rice husk and commercial substrate S10®. The experiment was carried out in expanded polyethylene trays, using basil seeds (Horticeres seeds®), which lasted 28 days. The experimental design was completely randomized, with five treatments (T1: 100 % commercial substrate (BCS); T2: 80 % BCS + 20 % Charred rice husk (CRH); T3: 60 % BCS + 40 % CRH; T4: 40 % BCS + 60 % CRH; T5: 20 % BCS + 80 % CRH) and three repetitions. Were evaluated leaf number, shoot length, root length, root dry mass,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicinal herbs; Aromatic herbs; Germination; Basil.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000100093

Effects of a growth promoter on bean ( Phaseolus vulgaris L.) crops in Sancti Spíritus province, Cuba
Provedor de dados: 109
Autores: Calzada,Kolima Peña; Fernández,Juan Carlos Rodríguez; Sotolongo,Martín Santana; Viciedo,Dilier Olivera; Expósito,Cesar Danilo Valle; Hernández,Richel Dorta.
Abstract In order to evaluate the effect of a growth promoter on the productivity performance and seed-quality in bean (Phaseolus vulgaris L.) crops, two experiments were carried out, one in the field and under controlled conditions. In the field experiments, a Latin square design was used for four treatments as follows: control, 0.5, 0.8 and 1.0 l.ha-1, respectively, where yield components were evaluated. The seeds used in the controlled conditions experiment were from prior trials, in a totally randomized design, at the dosages above mentioned. Seed germination and seedling growth were evaluated. In the field experiments, the product had a stimulating effect on the production. The highest yields were reached with the 0.8 and 1.0 l.ha-1 dosages in number...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Stimulants; Foliar fertilization; Germination; VIUSID agro.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000300360

Responses of sour passion fruit (Passiflora edulis Sims) seeds from the third recurrent selection cycle during storage
Provedor de dados: 109
Autores: Lima-Rodrigues,Daniele; Fio-Viana,Alexandre; Duarte-Vieira,Henrique; Azevedo-Santos,Eileen; Lima-e-Silva,Fernando Higino.
Abstract Conflicting responses have been found for the period of conservation of passion fruit seeds. Therefore, this study aimed to evaluate the response of the seeds of passion fruit progenies to a 24-month storage period. The sour passion fruit progenies from the third cycle of Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF intrapopulation recurrent selection program were grown in Itaocara- RJ and the progenies seeds were evaluated for: germination potential, germination first count, accelerated aging, first count of accelerated aging test, seedling and radicle size and germination speed index. The germination and vigor of the seeds of the full-sib progenies were assessed by analysis of variance and factorial arrangement with 3 progenies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breeding program; Germination; Longevity; Progeny; Vigor; Passiflora edulis Sims; Sour passion fruit.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000100061

Preconditioning of Physalis angulata L. to maintain the viability of seeds
Provedor de dados: 36
Autores: Souza,Manuela Oliveira de; Souza,Cíntia Luiza Mascarenhas de; Barroso,Natalia dos Santos; Pelacani,Claudinéia Regina.
The important chemical and food properties conferred to P. angulata make it necessary to conduct studies in seed conservation. This study evaluated the effect of priming of P. angulata seed for varying periods and storage conditions. Lots of seeds were stored in a refrigerator and in ambient conditions for up to 24 months. Some of these seeds were primed before or after storage. The results show that there was variation in moisture content. The germination rate and germination rate index remained high in ambient conditions when primed up to 24 months.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Storage environments; Germination; Longevity; Priming.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000100015

DISTINGUISHING Campa guianensis Aubl. FROM Campa procera D.C. (MELIACEAE) BY MORPHOLOGY OF YOUNG SEEDLINGS
Provedor de dados: 36
Autores: FISCH,Simey Thury Vieira; FERRAZ,Isolde Dorothea Kossmann; RODRIGUES,William Antonio.
Seedling morphology was studied in Campa guianensisAubl. and Carapa proceraD. C. from germination to 90 days age. In both species germination is hypogeal and cryptocotylar. Both have rare albino seedlings. Though both species have compound leaves when adult, C, proceraputs out an average total of six simple leaves at germination, while leaves of C. guianensisare compound at all stages. This is the best diagnostic character for separation of the two species at the young seedling stage. Not diagnostic, but none the less useful, is the fact, that polyembryonic seeds are often found in C. procera,but not observed in C guianensis.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carapa guianensisAubl; Carapa proceraD. C.; Seedling morphology; Germination; Polyembryony.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671995000400193

Anatomical and histochemical comparison of the primary and adventitious roots of Attalea microcarpa (Arecaceae) at the initial growth stage
Provedor de dados: 36
Autores: CORRÊA,Marcos Melo; ARAÚJO,Maria Gracimar Pacheco de; MENDONÇA,Maria Sílvia de.
ABSTRACT We describe the anatomical structure of roots originating from the apocole of Attalea microcarpa compared to the primary root, by means of usual methods for optical microscopy. The adventitious roots are differentiated in the apocole associated to vascular bundles, and can remain as a single structure or branch. They have the basic root structure characteristic of Arecoideae palms, without schizogenous spaces, which are observed in the primary root, in addition to few air spaces. Mucilages, starch and proteins were present in both types of roots. Adventitious roots of the apocole are described for the first time in Arecaceae.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Amazon; Anatomy; Germination; Palm tree; Seedling; Root system.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400311

Effects of sucrose and irradiance on germination and early gametophyte growth of the endangered tree fern Dicksonia sellowiana Hook (Dicksoniaceae)
Provedor de dados: 39
Autores: Renner,Gladys Daniela Rogge; Randi,Áurea Maria.
It is an endangered tree fern that grows in mixed umbrophylus forests in the tropics. Sterilized spores were germinated at 25 ± 2ºC under a 16-hour photoperiod, in Dyer and MS medium supplemented with 0 to 5% sucrose. The germination was lower with the addition of sucrose. Dry mass was higher in 30-day-old gametophytes cultivated in Dyer medium with the addition of 3 to 5% of sucrose. The dry mass decreased in 30-day-old gametophytes cultivated in Dyer and MS media without sucrose and in MS medium with the addition of 4 or 5% of sucrose. The effect of different irradiance on the germination and early gametophyte development of D. sellowiana was analyzed in the autumn of 1998 (May until July). Conical flasks containing spores were kept over a period of 49...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sugar; Chlorophyll; Gametophyte; Germination; Irradiance.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062004000200017

Unveiling the germination requirements for Cereus hildmannianus (Cactaceae), a potential new crop from southern and southeastern Brazil
Provedor de dados: 39
Autores: Becker,Rafael; Ri,Leandro Dal; Farias-Singer,Rosana; Singer,Rodrigo Bustos.
ABSTRACT Cereus hildmannianus K. Schum is a columnar cactus native to South and Southeast Brazil. The cultivation of this species seems justifiable for several reasons: its fruits are spineless and edible; it is not threatened with extinction; it naturally occurs in Pampa and Atlantic Forest under non-xeric conditions that may be unsuitable for the cultivation of other tropical cacti; and the plants are pollinator-dependent and so should benefit from native pollinators. This study aimed to test seed germination of C. hildmannianus with samples collected at three different localities in southern Brazil, as a necessary step preceding any attempts of management and domestication. Seeds were exposed to temperatures of 20° C, 25° C, 30° C and room temperature....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cacti; Cereus hildmannianus; Germinability; Germination; Synchronicity; Tuna.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400765

Allelopathic potential of bark and leaves of Esenbeckia leiocarpa Engl. (Rutaceae)
Provedor de dados: 39
Autores: Souza,Flaviana Maluf; Gandolfi,Sergius; Perez,Sonia Cristina Juliano Gualtieri de Andrade; Rodrigues,Ricardo Ribeiro.
We investigated the inhibitory potential of aqueous extracts of bark and leaves of Esenbeckia leiocarpa Engl. on lettuce germination and early seedling growth. We compared the effects of four concentrations (100, 75, 50 and 25%) of each extract to water and polyethylene glycol (PEG 6000) solution controls for four replicates of 50 seeds for germination and four replicates of ten seedlings for seedling growth. The inhibitory effects of E. leiocarpa extracts on the percentage of germination and on the germination speed seemed to be more than simply an osmotic effect, except for the percentage of seeds germinated in bark extracts. When compared to water control, both bark and leaf extracts delayed germination, and leaf extracts also affected the percentage of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Germination; Growth; Inhibition; Plant-plant interaction.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100016

Interspecific variation in the allelopathic potential of the family Myrtaceae
Provedor de dados: 39
Autores: Imatomi,Maristela; Novaes,Paula; Gualtieri,Sonia Cristina Juliano.
Allelopathy is a type of biotic interference wherein a plant releases bioactive metabolites into an environment, thereby affecting the adjacent biota. Stressful environments stimulate the production of these metabolites. The present study tests the novel weapons hypothesis, which postulates that species belonging to the same genus and from the same environment have similar allelopathic effects. The aim of this study was to assess the allelopathic effects that the aqueous leaf extracts of 15 species belonging to five genera of the Myrtaceae family have on the seed germination and initial seedling growth of lettuce (Lactuca sativa L.), tomato (Solanum lycopersicum L.) and onion (Allium cepa L.). Germination rates, average germination times, informational...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Aqueous leaf extract; Genus similarity; Germination.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100008

Response of spores and young gametophytes of Cyathea delgadii Sternb. (Cyatheaceae) and Blechnum brasiliense Desv. (Blechnaceae) to different light levels
Provedor de dados: 39
Autores: Hiendlmeyer,Rosane; Randi,Aurea Maria.
Light is a limiting factor for fern stablishment because it controls germination of light sensitive spores. The aim of this work was to study the effect of light levels on spore germination in two ornamental ferns native to the Atlantic forest, under natural conditions. Cyathea delgadii is a tree fern and Blechnum brasiliense, a subarborescent fern. The effect of light levels was analyzed in April and July/2003, in Florianópolis, Santa Catarina state, Brazil. Sterilized spores were sown in Erlenmeyer flasks containing mineral culture medium with macronutrients, iron, and benomyl 0.01%. The Erlenmeyer flasks were kept in 50 cm³ boxes covered with black shade netting, which gave 5, 22, 42, and 62% natural light. Irradiance and temperature were scored daily...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ferns; Germination; Light levels; Photoinhibition; Spores.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000400015

Phytotoxicity of organic extracts of Turnera ulmifolia L. and Turnera diffusa Willd. ex Schult. in cucumber seeds
Provedor de dados: 39
Autores: Silvestre,Daniel Moreto; Kolb,Rosana Marta; Frei,Fernando; Santos,Catarina dos.
We evaluated the phytotoxic effects that the hexane, ethyl acetate and methanol extracts from leaves and branches of the species Turnera ulmifolia L. and Turnera diffusa Willd. ex Schult. (Turneraceae), at concentrations of 1.25, 2.50, 3.75 and 5.00 mg ml-1, have on seed germination and seedling development in cucumber (Cucumis sativus L.). None of the extracts tested prevented germination, although the ethyl acetate extracts of T. diffusa, at 3.75 and 5.00 mg ml-1, reduced the mean germination speed and time to germination. Hexane extracts of both species reduced the main root length, number of secondary roots and hypocotyl length. In the ethyl acetate and methanol extracts, the number of secondary roots and hypocotyl length varied by species and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Cucumis sativus; Germination; Development.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300003

Germinability after desiccation, storage and cryopreservation of seeds from endemic Encholirium Mart. ex Schult. &amp;amp; Schult. f. and Dyckia Schult. &amp;amp; Schult. f. species (Bromeliaceae)
Provedor de dados: 39
Autores: Tarré,Erika; Pires,Bárbara Balzana Mendes; Guimarães,Ana Paula Mançano; Carneiro,Leonardo Alves; Forzza,Rafaela Campostrini; Mansur,Elisabeth.
(Germinability after desiccation, storage and cryopreservation of seeds from endemic Encholirium Mart. ex Schult. &amp;amp; Schult. f. and Dyckia Schult. &amp;amp; Schult. f. species (Bromeliaceae)). Seed storage procedures require previous determination of optimal temperature and light conditions for germination, as well as of tolerance to desiccation and low temperatures. The aim of this paper was to study the effects of desiccation, storage at low temperatures and cryopreservation on the germinability of seeds of six Encholirium and two Dyckia species, which were selected according to vulnerability criteria. Initial germinability of newly harvested seeds varied from 35 to 95%. Seeds presented photoblastic behaviour since light was necessary to induce or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryopreservation; Espinhaço mountain range; Germination; Orthodox seeds; Seed conservation.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000400003

Seed traits of species from South Brazilian grasslands with contrasting distribution
Provedor de dados: 39
Autores: Martins,Alexandre Cristante; Marchioretto,Rafaella Migliavacca; Vieira,Ariane Tonetto; Stiehl-Alves,Eudes Maria; Santos,Eliane Kaltchuk dos; Souza-Chies,Tatiana Teixeira de.
ABSTRACT South Brazilian grasslands are among the most species-rich grasslands worldwide yet they have been suffering ongoing degradation due to land-use. Little is known about the reproductive ecology of the native species of these grasslands. Thus, our goal was to characterize seed traits and germination requirements of three native species of the tribe Tigridieae (Iridaceae, Iridoideae) due to its richness in the Pampa biome and the contrasting morphology, cytogenetics, and geographic distributions of its representatives. We tested if closely related species possess similar seed traits and whether species with wider distributions have broader germination requirements. Seed production and mass were estimated, and morphological analyses, germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dormancy; Functional traits; Germination; Grasslands; Iridaceae; Photoinhibition; Regeneration niche; Reproductive ecology; Seed morphology; Time-to-event analysis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400730

Seed dispersal of Solanum thomasiifolium Sendtner (Solanaceae) in the Linhares Forest, Espírito Santo state, Brazil
Provedor de dados: 39
Autores: Vasconcellos-Neto,João; Albuquerque,Lidiamar Barbosa de; Silva,Wesley Rodrigues.
The aim of this study was to analyse seed dispersal and establishment of Solanum thomasiifolium in an area of "nativo" vegetation in Espirito Santo state on the southeastern Brazilian coast. Ten species of birds, the crab-eating fox (Cerdocyon thous), and one species of lizard (Tropidurus torquatus) fed on S. thomasiifolium fruits and dispersed viable seeds in their faeces. The proportional contribution of each of these groups to seed dispersal was 77% (birds), 19% (crab-eating fox) and 4% (lizards). Ants also contributed to seed dispersal. More seeds were deposited in vegetation islands than in the surrounding open areas. Germination rates of seeds collected directly from fruit (control), bird droppings, the faeces of crab-eating foxes and lizards were,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birds; Crab-eating fox; Frugivory; Germination; Lizard; Seed deposition.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000400027

Global warming decreases the morphological traits of germination and environmental suitability of Dipteryx alata (Fabaceae) in Brazilian Cerrado
Provedor de dados: 39
Autores: Ribeiro,Raquel Menestrino; Tessarolo,Geizianne; Soares,Thannya Nascimento; Teixeira,Itamar Rosa; Nabout,João Carlos.
ABSTRACT We experimentally evaluated how different temperatures affect germination of individual seedlings of Dipteryx alata, and estimated the impact of climate change on the species using ecological niche modeling. A total of 240 seeds were randomly distributed among three different temperature treatments (32 ºC, 36 ºC, and 40 ºC), and monitored for 35 days. We measured seven seed traits and estimated the ecological niche of D. alata using a consensus of four methods. The treatment with the highest temperature produced smaller and lighter seedlings. The consensus of ecological niche modeling indicated that are expected to reduce the areas with climates favorable for D. alata in future scenarios. Thus, our two results (experiment and ecological niche...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climatic scenarios; Germination; Global climate change; Ecological niche model; Temperature.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300446

Effect of some environmental factors on seed germination of Eryngium caeruleum M. Bieb. populations
Provedor de dados: 39
Autores: Rezvani,Mohammad; Zaefarian,Faezeh.
ABSTRACT The effects of alternating and constant temperatures and light regimes, osmotic and salt stress and pH were tested on seed germination in four populations of Eryngium caeruleum. Laboratory experiments revealed that the four populations exhibited different responses to alternating temperature and light conditions. Alternating temperature and photoperiod had a greater positive effect on seed germination compared to complete darkness. The optimal constant temperature within 10 ºC to 15 ºC for seed germination of each population was determined in a light/dark photoperiod. Seed germination severely decreased under water stress and was completely inhibited at -0.8 MPa osmotic potential. Saline stress sharply decreased germination percentage. Germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternating and constant temperatures; Germination; Light; PH; Salt and osmotic stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200220

Salt stress: antioxidant activity as a physiological adaptation of onion cultivars
Provedor de dados: 39
Autores: Corrêa,Natália Silveira; Bandeira,Juliana de Magalhães; Marini,Patrícia; Borba,Isabel Cristina Gouvea de; Lopes,Nei Fernandes; Moraes,Dario Munt de.
The germination and development of several plant species can be limited when those plants are grown in soils with high salinity, which reduces seedling viability and vigor, as well as activating the antioxidant defense system. The aim of this study was to evaluate germination, initial growth and activity of antioxidant enzymes (superoxide dismutase, catalase and ascorbate peroxidase) in seedlings of three onion cultivars (Madrugada, Fepagro 27 and Petroline) exposed to different concentrations of NaCl (0, 40, 80, 120 and 160 mM). Seedlings were evaluated for viability, vigor and antioxidant enzyme activity. The experimental procedures were completely randomized in 3 × 5 factorial design, with each treatment performed in triplicate, at a significance level...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa; Growing; Oxidative stress; Germination; NaCl.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200013

Morphology of seeds and seedlings of four species of Vigna Savi (Leguminosae, Phaseolinae)
Provedor de dados: 39
Autores: Ojeda,Fabiana Soledad; Hoc,Patricia Susana; Amela García,María Teresa.
Four neotropical species of Vigna Savi (Leguminosae, Phaseolinae) have potential value as forage crops or ornamentals and could be cultivated in tropical or subtropical areas, even on floodplains. In order to obtain useful data for their culture and taxonomy, the seed morphology, germination pattern (hypogeal or epigeal) and seedling development were studied. The studied species belong to different sections of the genus: V. adenantha (G.F.W. Meyer) Maréchal, Mascherpa &amp;amp; Stainier (Sect. Leptospron); V. candida (Vell.) Maréchal, Mascherpa &amp;amp; Stainier (Sect. Sigmoidotropis); V. caracalla (L.) Verdc. (Sect. Caracallae) and V. luteola (Jacq.) Benth. (Sect. Vigna). The seeds were collected during fieldwork conducted in northwestern and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna; Seed morphology; Germination; Seedlings; Argentina.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300004

The effects of an exotic palm on a native palm during the first demographic stages: contributions to ecological management
Provedor de dados: 39
Autores: Mengardo,Ana Luisa T.; Pivello,Vânia R.
Biological invasions have negative impacts on native biota and consequently on biodiversity. In patches of Atlantic Forest in Brazil, the Australian palm tree Archontophoenix cunninghamiana has become invasive, whereas the endemic palm Euterpe edulis is threatened with extinction. The two species occupy parts of the same functional niche within the forests, which raises a question: Does the invasive species interfere with the recruitment of the native one when the two co-occur? We compared the initial demographic stages of these palms, and assumed that A. cunninghamiana would present better performance (higher rates of germination and seed viability) and would feature allelopathic properties that could influence the recruitment of the native species. We...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Arecaceae; Biological invasion; Germination; Palm heart.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400009

Sementes de Cássia tora L: estudo da germinação visando o controle em áreas cultivadas
Provedor de dados: 39
Autores: Andreani Junior,Roberto; Barbosa,José Marcos; Silva,Theophilo Salem da; Pitelli,Robinson Antônio; Barbosa,Luiz Mauro.
O trabalho é um estudo das condições de germinação das sementes de Cassia tora L., planta invasora das culturas em geral e, principalmente, da cultura da soja. Nesta pesquisa, estudou se a quebra da dormência, o efeito da profundidade de semeadura sobre a emergência de plântulas e o potencial de armazenamento, considerando o envelhecimento natural e precoce com o objetivo de um controle mais racional desta espécie. As profundidades de semeadura de 4 a 6 cm apresentaram as porcentagens mais altas de emergência das plântulas. A porcentagem de germinação de sementes, logo após a colheita, encontra-se próxima de 42%, decrescendo para 40%, 39% e 30%, aproximadamente, nos períodos de armazenamento por 90, 180 e 270 dias, respectivamente, evidenciando uma...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cassia tora L; Seeds; Germination; Weed plant.
Ano: 1987
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000300017

Qualidade fisiológica de sementes de uva-do-japão após envelhecimento acelerado e armazenamento - doi: 10.4025/actasciagron.v32i3.4491
Provedor de dados: 1
Autores: Pereira, Gabriely Pinto; Pontifícia Universidade Católica do Paraná; Carvalho, Ruy Inacio Neiva de; Pontifícia Universidade Católica do Paraná; Biasi, Luiz Antonio; Universidade Federal do Paraná.
Este trabalho objetivou avaliar o efeito do teste de envelhecimento acelerado e de condições de armazenamento na qualidade fisiológica de sementes de Hovenia dulcis. O teste de envelhecimento acelerado foi realizado com seis tempos (0, 24, 48, 72, 96 e 120 horas) e quatro repetições. O armazenamento foi estudado num esquema fatorial 2 x 7, sendo um fator a condição de armazenamento (ambiente de laboratório e geladeira) e o outro fator, o tempo de armazenamento (0, 8, 16, 24, 32, 40 e 48 semanas), com quatro repetições. O envelhecimento acelerado foi realizado à temperatura de 45&amp;deg;C e as sementes foram armazenadas ao ambiente e em geladeira, à temperatura de 4 a 7&amp;deg;C e umidade relativa do ar de 40 a 50%, ambos no escuro. As variáveis...
Tipo: Pesquisa Básica
Palavras-chave: 5.01.00.00-9; 5.01.03.00-8 Hovenia dulcis; Entropia; Germinação 5.01.03.03-2 Hovenia dulcis; Entropy; Germination.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4491

Qualidade fisiológica de sementes de guanxuma em influência do envelhecimento acelerado e da luz - DOI: 10.4025/actasciagron.v31i3.585
Provedor de dados: 1
Autores: Carvalho, Denise Bruginski de; PUCPR; Carvalho, Ruy Inacio Neiva de; PUCPR.
O objetivo deste trabalho foi determinar o efeito do envelhecimento acelerado e da presença da luz na qualidade fisiológica de sementes de guanxuma (Sida rhombifolia L.). Foram estudados quatro tempos de envelhecimento acelerado (0, 24, 48 e 72h) e a presença ou ausência de luz no teste de germinação. O delineamento experimental adotado foi em blocos casualizados num esquema fatorial 4 x 2, com três repetições. Adotou-se o método de germinação sobre papel em caixa de plástico (Gerbox) à temperatura de 25&amp;deg;C. Analisaram-se as variáveis porcentagem de germinação, índice de velocidade de germinação (IVG), tempo médio para germinação (TMG), velocidade média de germinação (VMG) e entropia. As avaliações foram realizadas durante 63 dias após a instalação...
Tipo: Pesquisa básica
Palavras-chave: 5.01.00.00-9    Agronomia Sida rhombifolia; Germinação; Fisiologia vegetal; Vigor Produção e Beneficiamenrto de Sementes Sida rhombifolia; Germination; Plant physiology; Vigor.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/585

Physiological and biochemical changes during desiccation tolerance loss in millet (Pennisetum glaucum L.) seeds
Provedor de dados: 1
Autores: Fernandes, Joana Souza; Guimarães, Renato Mendes; Faria, Jose Marcio Rocha; Pereira, Diego de Sousa; Coelho, Stefania Vilas Boas; Oliveira, Ariadne Santos.
The aim of this study was to evaluate the physiological and biochemical changes related to desiccation tolerance loss in millet seeds. The studied points of the germination process were determined according to the seed imbibition curve of the millet hybrid ADRF6010: control (0h), 3h of imbibition, 1 and 3 mm radicle. The seeds were dried on silica gel for 72h at 20°C, followed by pre-humidification at 25°C for 24h. Seed physiological quality was evaluated by electrical conductivity and a germination test, and seed vigor was evaluated with a first germination count and a germination speed index. The experiment was performed in a completely randomized design, and means were compared by the Scott-Knott test at a 5% probability. The enzymatic systems of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Desiccation sensitivity; Germination; Proteins; Enzymes.; Agronomy; Dessecação de sementes; Fisiologia de Sementes; Tolerância à dessecação em sementes.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36522

Phytotoxic effects of aqueous leaf extracts of four Myrtaceae species on three weeds
Provedor de dados: 1
Autores: Imatomi, Maristela; Novaes, Paula; Miranda, Maria Augusta Ferraz Machado; Gualtieri, Sonia Cristina Juliano.
Research on allelopathic interactions can be useful in the search for phytotoxins produced by plants that may be employed as natural herbicides. The aim of this study was to assess the phytotoxic action of aqueous leaf extract of Blepharocalyx salicifolius, Myrcia multiflora, Myrcia splendens and Myrcia tomentosa on the germination and development of three weeds. The working hypothesis was that leaf extracts of Myrtaceae may negatively influence the development of weed species. Aqueous leaf extracts at 5 and 10% (g mL-1) were tested on the germination and growth of Euphorbia heterophylla, Echinochloa crus-galli and Ipomoea grandifolia and compared with the herbicide oxyfluorfen and distilled water (control). The most extracts caused pronounced delays in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomia e fisiologia vegetal allelopathy; Germination; Growth; Herbicide Agronomia.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19079

Use of phytoregulators in overcoming macaw palm seed dormancy - doi: 10.4025/actasciagron.v35i4.16385
Provedor de dados: 1
Autores: Oliveira, Túlio Gabriel Soares; Universidade Federal de Lavras - UFLA; Rodrigues Junior, Ailton Gonçalves; Universidade Federal de Lavras - UFLA; Souza, Patrícia Pereira de; Universidade Federal de Viçosa - UFV; Ribeiro, Leonardo Monteiro; Universidade Estadual de Montes Claros - Unimontes.
The macaw palm is a tropical palm with significant potential for biofuel production; however, seed dormancy is a major factor limiting its agro-industrial use. The present study evaluated the effects of phytoregulators in overcoming macaw palm seed dormancy. We evaluated the effects of immersion in solutions of gibberellic acid (GA3) (0, 2000 and 5000 mg L-1) during two exposure times (24 and 48 hours), associated with the removal or maintenance of the opercular tegument, as well as the effects of the associations between GA3 (2000 mg L-1), indole-3-butyric acid (IBA) and benzylaminopurine (BAP) and the effects of repeated applications (one, two or five) of combinations of these phytoregulators. The seeds were sown in vermiculite and incubated in a humid...
Palavras-chave: 5.00.00.00-4; 5.01.03.00-8 Acrocomia aculeata; Germination; GA3; IBA; BAP; Arecaceae Ciências Agrárias; Fitotecnia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16385

Dormancy breaking in macaw palm [Acrocomia aculeata (Jacq.) Loddiges ex Mart.] seeds doi: 10.4025/actasciagron.v36i1.13220
Provedor de dados: 1
Autores: Neto, Aurélio Rúbio; Cooperativa Mista dos Produtores Rurais do Sudoeste de Goiás; Silva, Fabiano Guimarães; Instituto Federal Goiano; Sales, Juliana de Fátima; Instituto Federal Goiano; Reis, Edésio Fialho dos; Universidade Federal de Goiás; Silva, Laila Queiroz; Instituto Federal Goiano; Campos, Rafael Cândido; Instituto Federal Goiano.
This study was performed to improve the speed of and standardize the process for the germination of macaw palm seeds. The effect of mechanical scarification (removal of the tegument in the hilum region), thermal scarification (imbibition of seeds in water at approximately 100°C for two or four minutes) and chemical scarification (98% sulfuric acid treatment for two or four minutes) were compared to a control (no scarification) in both a germination chamber and a greenhouse, representing trials one and two, respectively. The effect of imbibition speed (fast or slow) and different concentrations of gibberellic acid (0, 100 or 200 mg L-1) on the germination percentage and index of germination velocity were evaluated during a third trial. Mechanical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.00-8 Arecaceae; Germination; Gibberellic acid 5.01.03.04-0.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/13220

Physiological quality and enzymatic activity of crambe seeds after the accelerated aging test - doi: 10.4025/actasciagron.v33i4.8248
Provedor de dados: 1
Autores: Toledo, Mariana Zampar; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Teixeira, Renake Nogueira; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Ferrari, Tainara Bortolucci; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Ferreira, Gisela; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Cavariani, Cláudio; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Cataneo, Ana Catarina; Universidade Estadual Paulista "Júlio de Mesquita Filho".
Crambe is a promising crop for biodiesel production, mainly due to the high oil content of its seeds. However, there have been no effective methodologies for evaluating the physiological quality of crambe seeds. Seed lots have not been compared, especially by vigor tests, such as the accelerated aging. The objective of this study was to evaluate the effects of high temperature and exposure periods on the physiological quality and enzymatic activity of crambe seeds during the accelerated aging test. Two lots of crambe seeds of the Brilhante cultivar were analyzed by tests of moisture content, weight of 1,000 seeds, germination, first count, electrical conductivity, enzymatic activity (peroxidase and superoxide dismutase) and seedling length. All tests were...
Tipo: Pesquisa Empírica de Campo
Palavras-chave: 5.01.03.03-2 Crambe abyssinica; Germination; Vigor; Deterioration Produção e Beneficiamento de Sementes Crambe abyssinica; Germination; Vigor; Deterioration.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/8248

Comparative allelopathic effects of Cryptocarya moschata and Ocotea odorifera aqueous extracts on Lactuca sativa - doi: 10.4025/actasciagron.v35i2.15758
Provedor de dados: 1
Autores: Prichoa, Franciele Carla; Universidade Regional Integrada do Alto Uruguai e das Missões; Leyser, Gabriela; Universidade Regional Integrada do Alto Uruguai e das Missões; Oliveira, José Vladimir de; Universidade Federal de Santa Catarina; Cansian, Rogério Luis; Universidade Regional Integrada do Alto Uruguai e das Missões.
The aim of this work was to compare the allelopathic effects of aqueous leaf extracts from Cryptocarya moschata and Ocotea odorifera on the seed germination and initial growth of Lactuca sativa (lettuce). The extracts were prepared by cold maceration, which was accomplished by adding distilled water to the dried plant material 1:10 (w v-1) and grinding. The treatment concentrations (0, 0.25, 0.5, 0.75 and 1%) were obtained by dissolving the dried crude extract in distilled water. The allelopathic potential of the dried Ocotea odorifera and Cryptocarya moschata leaves on Lactuca sativa was observed through reduction of the percentage of seeds that germinated, the index of germination and the length of the roots as well as structural abnormalities in L....
Palavras-chave: Alelopatia; Cryptocarya moschata; Lauraceae; Germinação. allelopathy; Allelochemical; Lauraceae; Germination.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15758

Allelopathy in five species of Erythroxylum  doi: 10.4025/actasciagron.v35i3.16016
Provedor de dados: 1
Autores: Dutra Taveira, Leila Kelly Pereira; Universidade Regional do Cariri; Silva, Maria Arlene Pessoa; Universidade Regional do Cariri; Loiola, Maria Iracema Bezerra; Universidade Federal do Ceará.
The objective of this study was to determine the allelopathic potential of Erythroxylum rosuliferum O.E. Schulz; Erythroxylum stipulosum; Erythroxylum cuneifolium (Mart) O.E. Schulz; Erythroxylum vacciniifolium Mart. and Erythroxylum barbatum O.E. Schulz. Bioassays were performed to examine the seed germination and initial growth of seedlings of Lycopersicum esculentum Mill (tomato) and Allium cepa L. (onion) in Petri dishes following exposure to an ethanolic extract of fresh leaves from the test species at various concentrations. The growth of the tomato and onion seedlings was inhibited with the extracts of the species tested, and significant alterations in the development of the shoots and primary roots were observed. These results suggest that the five...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fisiologia Vegetal allelopathic properties; Germination; Development of seedlings; Cerrado; Chapada do Araripe Alelopatia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16016

Physiological and biochemical changes during the loss of desiccation tolerance in millet (Pennisetum glaucum L.) seeds
Provedor de dados: 1
Autores: Fernandes, Joana Souza; Guimarães, Renato Mendes; Faria, Jose Marcio Rocha; Pereira, Diego de Sousa; Coelho, Stefania Vilas Boas; Oliveira, Ariadne Santos.
The aim of this study was to evaluate the physiological and biochemical changes related to the loss of desiccation tolerance in millet seeds. The points studied were determined according to the seed imbibition curve of the hybrid ADRF6010: control (0 h), 3 h, 1 and 3 mm of radicle. The seeds were dried on silica gel for 72 h at 20 °C, followed by pre-humidification at 25 °C for 24 h. The physiological quality was evaluated by the electrical conductivity and germination test, and the seed vigor through the first count and germination speed index. The experiment was performed in a completely randomized design and means were compared by the Scott-knott test at 5% probability. The enzymatic systems evaluated were: superoxide dismutase, catalase, peroxidase,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed Physiology; Desiccation Tolerance desiccation sensitivity; Germination; Proteins; Enzymes. Agronomy Dessecação de sementes; Fisiologia de Sementes Tolerância à dessecação em sementes.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36522

Potencial fisiológico de sementes de mamona tratadas com micronutrientes - doi: 10.4025/actasciagron.v32i4.4829
Provedor de dados: 1
Autores: Oliveira, Rosa Honorato de; Universidade FederalRural dePernambuco, Unidade Acadêmica de Serra Talhada; Souza, Myrne Jamilly de Lima; UESB; Morais, Otoniel Magalhães; UESB; Guimarães, Bruno Vinicius Castro; UESB; Pereira Júnior, Hercílio de Assis; UESB.
O objetivo deste trabalho foi verificar os efeitos da aplicação de micronutrientes sobre a germinação e o vigor de sementes de mamona, especificamente a cultivar BRS 149 Nordestina. Utilizou-se o delineamento experimental inteiramente casualizado, com quatro repetições de 25 sementes. Os tratamentos constaram da testemunha, imersão em H2O, imersão em B, imersão em Zn, imersão em Cu, imersão em Mn, imersão em Mo e imersão em Fe. Por meio dos resultados obtidos, evidencia-se incremento na germinação e no vigor com a aplicação de micronutrientes às sementes de mamona. O B influenciou negativamente a germinação e o vigor e aumentou a porcentagem de sementes duras e dormentes.
Palavras-chave: 5.01.00.00-9 e 5.01.03.00-8 Ricinnus communis L.; Germinação; Sementes; Vigor; Plântulas; Nutrientes Fertilidade do Solo e Adubação Ricinus communis L.; Germination; Seeds; Vigor; Seedlings; Nutrients.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4829

Métodos de superação de dormência de sementes de barbatimão - DOI: 10.4025/actasciagron.v30i3.3548
Provedor de dados: 1
Autores: Martins, Cibele Chalita; FCA/UNESP; Camara, Armando Tadeo Rodriguez da; FCA/UNESP; Machado, Carla Gomes; FCA/UNESP; Nakagawa, João; FCA/UNESP.
O objetivo do trabalho foi identificar métodos para superar a dormência e promover a germinação de sementes de Stryphnodendron adstringens e Stryphnodendron polyphyllum. Sementes de ambas as espécies foram submetidas aos seguintes tratamentos de superação de dormência: testemunha, escarificação mecânica (lixa número 220), H2O quente (temperatura inicial de 87ºC) por 5 e por 15 minutos, escarificação química com H2SO4 (95%) por 30, 45, 60, 75, 90 e 105 minutos, choque térmico 1 (0ºC e 50%UR por 1h e após imersão em água por 10 min Ti=85oC Tf=57oC), choque térmico 2 (40ºC e 40%UR por 6h e após imersão em água por 10 min Ti=0ºC Tf=3ºC), choque térmico 3 (40ºC e 40%UR por 6h e após imersão em água por 10 min Ti=25ºC Tf=25ºC). Conclui-se que sementes...
Palavras-chave: 5.01.00.00-9 Agronomia Stryphnodendron adstringens; Stryphnodendron polyphyllum; Germinação; Sementes duras 5.01.03.00-8 Fitotecnia Stryphnodendron adstringens; Stryphnodendron polyphyllum; Germination; Hard seeds.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3548

‘Desiccation tolerance of Rhamnidium elaeocarpum Reissek (Rhamnaceae) seeds
Provedor de dados: 1
Autores: Silva, Lílian Abadia da; Sales, Juliana de Fátima; Oliveira, João Almir; Pinho, Édila Vilela de Resende Von; Santos, Heloisa Oliveira dos; Soares, Marcos Antônio.
This study aimed to investigate the desiccation tolerance of Rhamnidium elaeocarpum Reissek seeds through physiological and biochemical alterations. Fruit were collected from the municipality of Jaupaci, Goias State, Brazil, when the water content of their seeds had a 37% wet basis (w.b.) and the seeds were subsequently kept in a drying oven with air circulation at a temperature of 35ºC until a water content was reached of 20 to 12% (w.b.). The following parameters were evaluated: germination, germination speed index, emergence, emergence speed index, electrical conductivity and respiration rate. Furthermore, the electrophoretic profile of the isoenzymes: catalase, peroxidase and esterase, the enzymatic activities of endo-β-mannanase and α-amylase and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.00-8 drying; Germination; Isoenzymes; Respiration rate; Heat-resistant proteins Produção e beneficiamento de sementes.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19425

Viabilidade de sementes de feijão macassar tratadas com extrato vegetal e acondicionadas em dois tipos de embalagens - DOI: 10.4025/actasciagron.v31i2.323
Provedor de dados: 1
Autores: Almeida, Francisco de Assis Cardoso; UFCG; Cavalcanti, Maria de Fátima Bezerra Soares; UFCG; Santos, João Felinto dos; EMEPA-PB; Gouveia, Josivanda Palmeira Gomes de; UFCG; Barros Neto, Jaime José de Silveira; UFCG.
Objetivou-se com o presente trabalho estudar a perda de viabilidade das sementes de duas variedades de Vigna unguiculata, acondicionadas em embalagens de papel e recipiente metálico, armazenados em ambiente não controlado. Após a colheita das sementes, em campos preparados para esta finalidade, as mesmas foram beneficiadas manualmente, tratadas, acondicionadas e armazenadas, para que a cada dois meses fossem avaliadas quanto a sua qualidade fisiológica mediante teste de germinação, indicando a melhor capacidade armazenadora para a condição do estudo. A análise dos dados foi realizada no delineamento inteiramente casualizado, disposto em esquema fatorial 2 x 2 x 2 x 6 com 4 repetições, sendo os fatores quantitativos revelados pela regressão na análise de...
Palavras-chave: 5.01.00.00-9 Agronomia Vigna unguiculata; Extrato de Piper nigrum; Armazenamento; Germinação Vigna unguiculata; Piper nigrum extract; Storage; Germination.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/323

Influência do substrato no crescimento de mudas de cupuaçu (Theobroma grandiflorum Schum.) - DOI: 10.4025/actasciagron.v31i4.3092
Provedor de dados: 1
Autores: Ferreira, Maria das Graças Rodrigues; EMBRAPA; Rocha, Rodrigo Barros; EMBRAPA; Gonçalves, Edilma Pereira; UFRPE; Alves, Edna Ursulino; UFPB; Ribeiro, George Duarte; EMBRAPA.
Entre as fruteiras amazônicas, destaca-se o cupuaçuzeiro, espécie de recente domesticação que vêm sendo valorizada por suas características de sabor e aroma. Um dos fatores determinantes para produção de mudas é a recomendação do substrato mais apropriado e, para espécies nativas, esta informação ainda é escassa. O objetivo deste trabalho foi avaliar o efeito de diferentes substratos na velocidade de germinação das sementes e no crescimento das mudas de cupuaçu. O trabalho foi realizado em casa-de-vegetação, sendo testados sete substratos: terra vegetal + areia (1:1), terra vegetal, bioplant®, bioclone®, plugmix®, areia e vermiculita. Foram avaliadas as características: índice de velocidade de emergência (IVE), comprimento da raiz (CR), comprimento da...
Palavras-chave: 5.01.03.04-0    Produção de Mudas fruta nativa; Sementes; Germinação 5.01.03.04-0 native fruit  seeds; Germination.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3092

Sementes de guandu, produzidas em semeadura tardia: efeito de doses de fósforo, potássio e espaçamentos - DOI: 10.4025/actasciagron.v30i4.5318
Provedor de dados: 1
Autores: Bertolin, Danila Comelis; UNESP Ilha Solteira; Sá, Marco Eustáquio de; UNESP; Buzetti, Salatiér; UNESP; Colombo, Adriana de Souza; UNESP; Oliveira, Letícia Lisboa; UNESP; Rodrigues, Graciela Bassan; UNESP.
O presente trabalho teve por objetivo avaliar o efeito de cinco doses de P2O5 e quatro doses de K2O, em dois espaçamentos entre linhas, sobre a qualidade das sementes de guandu utilizando uma cultivar de ciclo curto, em Selvíria-Estado do Mato Grosso do Sul. Foram realizadas avaliações de velocidade de germinação, primeira contagem de germinação, germinação, envelhecimento acelerado e emergência de plantas em campo.  Para a determinação do efeito dos tratamentos, foi utilizado o delineamento inteiramente casualizado, em fatorial 2x5x4, com quatro repetições.  Os tratamentos foram: espaçamentos entre linhas de 30 e 50 cm, doses de P2O5 de 0, 40, 80, 120 e 160 kg há-1 e doses de K2O de 0, 30, 60 e 90 kg há-1. Não houve diferenças significativas entre...
Palavras-chave: 5.01.00.00-9    Agronomia Cajanus cajan L. Millsp.; Densidade; Germinação; Emergência de plantas. Cajanus cajan L. Millsp.; Density; Germination; Seedlings field emergence.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5318

Influences of presowing treatments on the germination and emergence of fig seeds (Ficus carica L.) - doi: 10.4025/actasciagron.v34i3.13392
Provedor de dados: 1
Autores: Çalişkan, Oguzhan; Faculty of Agriculture, University of Mustafa Kemal; Mavi, Kazim; Faculty of Agriculture, University of Mustafa Kemal; Polat, Aytekin; Faculty of Agriculture, University of Mustafa Kemal.
Seed germination of fig seeds is important for obtain seedlings with high variability in breeding studies, and for producing mosaic virus-free seedlings. This experiment was carried out to evaluated the effects of several treatments (priming with water for 24h, GA3 at 500 and 1000 ppm for 24h, 3% KNO3 for 24h, and stratification at 4°C for 7, 14 and 21 days) on seed germination and emergence of ‘Bursa Siyahı’ and ‘Sarılop’ fig cultivars. The application of GA3 increased the germination and emergence of these fig seeds. The highest percentages of germination and emergence were obtained with GA3 at 500 or 1000 ppm for both cultivars. The seed germination and emergence of the cultivar ‘Bursa Siyahı’ were higher than observed with the ‘Sarılop’. The...
Tipo: Laboratory analysis
Palavras-chave: Ficus carica L.; Fig; Seed germination; Seedling emergence; Seed treatments seed germination and emergence Horticulture Ficus carica L.; Fig; Seed; Germination; Seedling emergence; Seed treatments seed germination and emergence.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/13392

Avaliação de cultivares de soja quanto à tolerância ao estresse hídrico em substrato contendo polietileno glicol - DOI: 10.4025/actasciagron.v30i2.1731
Provedor de dados: 1
Autores: Texeira, Leandra Regina; UEM; Braccini, Alessandro de Lucca e; UEM; Sperandio, Decio; UEM; Scapim, Carlos Alberto; UEM; Schuster, Ivan; Cooperativa Central de Pesquisa Agricola; Viganó, Joselaine; UEM.
O trabalho teve por objetivo avaliar genótipos de soja quanto à tolerância ao estresse hídrico, em substrato embebido com polietileno glicol (PEG 6000). Foram utilizadas sementes armazenadas por um ano, em condições não-controladas de laboratório das cultivares: CD 201, CD 202, CD 204, CD 205, CD 206, CD 208, CD 215, CD 216, Embrapa 48, BRS 132, BRS 184 e BRS 212. As avaliações consistiram em submeter às sementes aos testes de germinação, classificação do vigor das plântulas, comprimento e biomassa seca das plântulas, em condição de estresse hídrico, utilizando dois níveis de potencial osmótico (zero e -0,1 MPa). As cultivares foram agrupadas em diferentes classes de tolerância à seca, em razão da redução percentual nas características avaliadas {% Redução...
Palavras-chave: 5.01.03.05-9    Melhoramento Vegetal Glycine max (L.) Merrill; Sementes; Potencial osmótico; Germinação; Estresse hídrico 5.01.03.05-9    Melhoramento Vegetal Glycine max (L.) Merrill; Seeds; Osmotic potential; Germination; Water stress.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1731

Dynamics of proteins, carbohydrates and global DNA methylation patterns during induction of nodular cluster cultures from seeds of Vriesea reitzii
Provedor de dados: 1
Autores: Corredor, Jenny; De Conti, Daniela; Guerra, Miguel Pedro; Dal Vesco, Lirio Luiz; Pescador, Rosete.
Tissue culture techniques have been employed for bromeliad mass propagation by means of the morphogenetic route of nodular cluster cultures (NCs). This study aimed to assess protein, carbohydrate and global DNA methylation (GDM) level dynamics during NCs induction from Vriesea reitzii seeds. Seeds were inoculated into Murashige and Skoog (MS) liquid medium supplemented with 4 µM α-naphthaleneacetic acid (NAA) to induce NCs and in culture medium without plant growth regulators to form normal seedlings. Samples collected at 0, 3, 7, 10, 14, and 21 days of culture were analyzed. All parameters assessed showed the same variation pattern. However, seeds inducing NCs showed significantly lower starch (6.0 mg g-1 FM), carbohydrate (10.7 mg g-1 FM) and GDM (11.0%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromeliaceae; Bromeliad; Germination; Micropropagation; Seedling. Bromeliaceae bromeliad germination micropropagation seedling.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42448

Behavior of Jatropha curcas L. seeds under osmotic stress: germination and cell cycle activity
Provedor de dados: 1
Autores: Brito, Cristiane Dantas de; Loureiro, Marta Bruno; Teles, Clarissa Abreu Santosw; Schuck, Mariane Ruzza; Fernandez, Luzimar Gonzaga; Castro, Renato Delmondez de.
Jatropha curcas is an oil-rich Euphorbiaceae seed species renowned for its apparent tolerance to environmental stresses. It is considered a promising source of renewable feedstock for biodiesel production in the Brazilian semiarid region where crop establishment requires a better understanding of the mechanisms leading to proper seed and plant behavior under water restrictive conditions. This study describes physiological and cytological profiles of J. curcas seeds imbibed in water restriction conditions by means of osmotic stress or osmoconditioning. Seeds were characterized by size, weight, moisture content and dry mass, germinability, and cell cycle activation by means of tubulin and microtubule cytoskeleton accumulation. Osmoconditioning at -0.8 MPa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.00.00.00-4; 5.01.03.06-7; 5.01.03.03-2 Jatropha sp.; Germination; Drought stress; Cell cycle Ciências Agrárias.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19438

Superação da dormência em sementes de Murdannia nudiflora (L.) Brenan - DOI: 10.4025/actasciagron.v30i2.1785
Provedor de dados: 1
Autores: Erasmo, Eduardo Andrea Lemus; UFTO; Terra, Marcelo Alves; UFTO; Domingos, Vanessa David; Escola Agrotecnica Federal de Araguatins; Martins, Cibele Chalita; UESP; Costa, Neumárcio Vilanova da; UFTO.
O objetivo deste trabalho foi identificar tratamentos capazes de promover e uniformizar a germinação das sementes de Murdannia nudiflora (L.) Brenan. As sementes desta planta daninha, infestante de arroz irrigado, foram submetidas à escarificação mecânica, com lixa n° 220 (20, 30 e 40 fricções); escarificação química, com imersão em ácido sulfúrico (90% por 30 e 40 seg.), seguida por lavagem em água corrente; imersão em hipoclorito de sódio (2,5% por 8 e 12 horas) e soda cáustica (5 min.), seguida por cinco lavagens em água destilada; imersão em KNO3 (1% por 24 horas); pré-aquecimento, a 40°C, em substrato úmido ou seco por duas, três ou quatro semanas. O delineamento estatístico utilizado foi o inteiramente ao acaso com quatro repetições. As avaliações...
Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal planta daninha; Commelinaceae; Germinação 5.01.03.05-9 Melhoramento Vegetal weed; Commelinaceae; Germination.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1785

Phytotoxicity of leaf aqueous extract of Rapanea umbellata (Mart.) Mez (Primulaceae) on weeds - doi: 10.4025/actasciagron.v35i2.16166
Provedor de dados: 1
Autores: Novaes, Paula; Universidad de Cadiz; Imatomi, Maristela; Universidade Federal de São Carlos; Miranda, Maria Agusta Ferraz Machado; Universidade Federal de São Carlos; Gualtieri, Sonia Cristina Juliano; Universidade Federal de São Carlos.
Allelopathic substances can be used to develop weed control alternatives based on natural products. The objective of this study was to compare the phytotoxic activity of aqueous leaf extracts of Rapanea umbellata with the toxicity of a synthetic herbicide on the germination and growth of weed species. The weeds species barnyard grass (Echinochloa crus-galli), wild poinsettia (Euphorbia heterophylla) and morning glory (Ipomoea grandifolia) were used. The effects of the aqueous leaf extract of R. umbellata at concentrations of 10% and 5% (g mL-1) were compared to the control (distilled water) and to the synthetic herbicide oxyfluorfen. The average weed germination time was significantly lower (p &amp;lt; 0.05) in control than in extract and herbicide...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomia; Botânica; Fisiologia vegetal; Alelopatia  controle de espécies infestantes allelopathy; Germination; Growth; Initial length; Oxyfluorfen agronomia; Manejo e tratos culturais.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16166

Aplicação de enxofre em cobertura e qualidade fisiológica de sementes de feijão - DOI: 10.4025/actasciagron.v30i5.5968
Provedor de dados: 1
Autores: César, Mônica Lúcia; UNESP; Fonseca, Nara Rosseti; UNESP; Toledo, Mariana Zampar; UNESP; Soratto, Rogerio Peres; UNESP; Cavariani, Cláudio; UNESP; Crusciol, Carlos Alexandre Costa; UNESP.
A qualidade fisiológica das sementes pode ser afetada pelo estado nutricional das plantas, destacando-se, dentre os nutrientes, o fornecimento de enxofre, constituinte essencial dos aminoácidos. O trabalho objetivou avaliar os efeitos da adubação sulfatada em cobertura sobre a qualidade fisiológica de sementes de feijão cv. Pérola. O delineamento experimental utilizado foi em blocos casualizados, com quatro repetições. Os tratamentos foram constituídos por cinco doses de enxofre (0, 20, 40, 60 e 80 kg há-1) em cobertura, na forma de sulfato de amônio, 22 dias após a emergência das plântulas. Avaliou-se a qualidade fisiológica das sementes logo após a colheita mediante testes de germinação e vigor. A aplicação de enxofre, em cobertura, aumentou o vigor das...
Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal Phaseolus vulgaris; Germinação; Vigor; Sulfato de amônio; Nutrição mineral Phaseolus vulgaris; Germination; Vigor; Ammonium sulfate; Mineral nutrition.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5968

The yield and physiological quality of oat seeds subjected to cover with zinc - doi: 10.4025/actasciagron.v35i3.16359
Provedor de dados: 1
Autores: Tavares, Lizandro Ciciliano; Universidade Federal de Pelotas; Brunes, André Pich; Universidade Federal de Pelotas; Gadotti, Gizele Ingrid; Universidade Federal de Pelotas; Tunes, Lilian Madruga de; Universidade Federal de Pelotas; Barros, Antonio Carlos Souza Albuquerque; Universidade Federal de Pelotas; Villela, Francisco Amaral; Universidade Federal de Pelotas.
Micronutrients, such as zinc, are important for the metabolic activities that can benefit germination and seed vigor because many soils are deficient in this micronutrient. The objective of this study was to evaluate the influence of coating oat seeds with zinc on the physiological quality and yield of the seeds produced. The experimental design was completely randomized, with a 2 x 5 factorial arrangement of the following, with four replications per treatment: factor A - product 1, 780 g L-1 zinc, and product 2, 17 and 600 g L-1 nitrogen and zinc, respectively; and factor B - 0, 1, 2, 3 and 4 mL of each product kg-1 seed. The results were subjected to an analysis of variance and a means comparison test (p ≤ 0.5 using Tukey’s test). The experimental plots...
Palavras-chave: Agronomia Avena sativa L.; Germination; Micronutrient; Vigor Sementes.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16359

Phytotoxic potential of Drimys brasiliensis Miers for use in weed control
Provedor de dados: 1
Autores: Anese, Simoni; Gualtieri, Sonia Cristina Juliano; Grisi, Patrícia Umeda; Jatobá, Luciana de Jesus; Arduin, Marcos.
This study aims to evaluate the phytotoxicity potential of leaf and root extracts of Drimys brasiliensis on the germination and seedling growth of Panicum maximum and Euphorbia heterophylla and its influence on metaxylem cell size in the seedling roots of the latter specie. The leaf and root extracts were fractionated by partition chromatography, and the hexane and ethyl acetate fractions obtained from each organ were evaluated at different concentrations for phytotoxic activity in several bioassays. In seedling growth tests, we compared the effects of these fractions with the herbicide oxyfluorfen. The hexane fraction of the root extracts showed a higher inhibitory potential on the germination and growth of weeds and reduced the average size of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomia - Fisiologia vegetal allelopathy; Inhibition; Germination; Early growth. Controle de plantas daninhas.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19476

Hydrotime model can describe the response of common bean (Phaseolus vulgaris L.) seeds to temperature and reduced water potential - doi: 10.4025/actascibiolsci.v35i2.15393
Provedor de dados: 3
Autores: Cardoso, Victor José Mendes; Universidade Estadual Paulista; Bianconi, André; Universidade Estadual Paulista.
Germination parameters of the response to temperature and water potential from four common bean (Phaseolus vulgaris) lines based on thermal-time and hydrotime concepts were estimated to verify to what extent they can predict germination under different thermal and water conditions. The cultivars IPR Uirapuru and IAPAR 81 (drought-tolerant), and Grauna and Carioca (not tolerant) were used. The isothermal assays were performed in a temperature gradient block, and the assays with different osmotic potentials (PEG 6000) were performed in germination chambers. Seeds from drought-tolerant cultivars spent less time to germinate at supra-optimum temperatures than non-tolerant ones, and the cultivar Uirapuru (drought-tolerant) germinated faster in response to...
Palavras-chave: Carioca; Grauna; IAPAR 81; Uirapuru; Germination; Model.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/15393

Foliar application of plant growth regulators changes the physiological quality of crambe seeds
Provedor de dados: 3
Autores: Boiago, Nayara Parisoto; Coelho, Silvia Renata Machado; Fernandes, Giovana Scalcon; Paz, Carlos Henrique de Oliveira; Santos, Felipe Samways.
The application of plant growth regulators can manipulate the development of cultivated plants, and their physiological effects may be reflected in the physiological quality of the seeds. This study evaluated the effects of plant growth regulators (PGR) on the physiological quality of crambe seeds produced in the 2014 and 2015 harvests. During crop development, we applied two foliar sprayings of the following treatments: 1) control treatment with distilled water; 2) indole-3-acetic acid 100 mg L-1 (IAA); 3) 3-gibberellic acid P.A. 100 mg L-1 (GA3); 4) commercial PGR Stimulate® 6 mL L-1. The seeds were harvested and evaluated for water content, germination percentage and germination speed index (GSI), electrical conductivity and concentrations of leached...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crambe abyssinica Hochst. ex Fries; Growth promoters; Germination; Electrical conductivity; Ion leaching.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46093

Effectiveness of a solar grain dryer for drying paddy seed in Bangladesh
Provedor de dados: 111
Autores: Roy, Dipika; Saha, Chayan Kumer; Alam, Md. Monjurul; Alam, Md. Ashraful; Sarker, Tumpa Rani.
Proper and timely drying is needed for producing quality paddy seed. Open sun drying is often produced seed with foreign materials.  Solar dryer produced by science for society (S4S), India might be suitable for country like Bangladesh. Therefore, an attempt was taken to evaluate S4S seed dryer at the Workshop, Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh. In this experiment, the spatial and temporal distribution of temperature and moisture in S4S solar grain dryer was investigated and the seed quality was also evaluated. The dryer performance was evaluated with six trials in Boro season from May 10 to June 6, 2017 and with three trials in Aman season from November 7 to 11, 2017. Paddy seed samples were also dried...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solar drying; Temperature; Moisture content; Drying loss; Germination.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5957

Development of ornamental seedlings and cuttings for hydroponics using different substrate
Provedor de dados: 111
Autores: Fadel, Moustafa Amin.
This research paper focuses on investigating the effect of using various substrate materials on the development of seedlings for ornamental plants.  Bermuda grass (Cynodon dactylon), Petunia (Compacta Enana Rosa) and Epipremnum aureum, Bermuda; Petunia and Epipremnum aureum were cultivated in different substrates.  Synthetic sponge (Polyurethane sponge), Rockwool and sterilized cotton were used as the substrate materials in each case where an experimental water-circulating apparatus was designed and installed to execute the test. Results showed that after 15 days, Bermuda grass in Rockwool reached a germination rate of 70% while it did not exceed 50% in sponge or in medically treated cotton.  The highest germination rate after 20 days for Petunia was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydroponics hydroponics; Germination; Seedlings; Cuttings.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3851

Morphology and anatomy of the diaspores and seedling ofPaspalum (Poaceae, Poales)
Provedor de dados: 42
Autores: EICHEMBERG,MAYRA T.; SCATENA,VERA L.
ABSTRACTThe knowledge regarding of the diaspore and post-seminal development ofPaspalum L. is important for grassland biodiversity conservation, based on their representativeness and genetic improvement of forage. The morphology of the diaspore and the post-seminal development of Paspalum dilatatum Poir. (rhizomatous),P. mandiocanum Trin. var. subaequiglume Barreto (stoloniferous), P. pumilum Nees. (decumbent caespitose) andP. urvillei Steud. (erect caespitose) was described to distinguish species with different growth forms and to survey the characters useful for taxonomy. P. dilatatum differs by presenting oval diaspores larger than the others, with five prominent nerves and trichomes; P. urvillei presents diaspores with one central nerve that is more...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caryopsis; Embryo; Forage; Germination; Grass.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401389

Morpho-anatomical, physiological and biochemical changes in rubber tree seeds
Provedor de dados: 42
Autores: SOUZA,GENAINA A. DE; DIAS,DENISE C.F.S.; PIMENTA,THALINE M.; CARDOSO,AMANDA Á.; PIRES,RAQUEL M.O.; ALVARENGA,ANTÔNIO P.; PÍCOLI,EDGARD A.T.
ABSTRACT The physical, physiological and biochemical changes during the development until the dispersal of rubber tree seeds were evaluated with the purpose of estimating the point at physiological maturity. A total of 30 plants were selected at different points in a commercial planting area and had their flowers marked during the anthesis and every 15 days after marking. Fruits and seeds were collected for analysis of moisture content, dry matter, diameter and length. Details of the anatomy ultra-structure of the seeds were evaluated. The seed emergence, emergency speed index, heat resistant proteins and oxidative stress enzymes were examined. It was observed that fruits reached maximum size at 120 days after anthesis and seeds at 150 days. The seeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Oxidative stress enzymes; Physiological maturity; Seeds development.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401625

Physiological behavior of bean's seeds and grains during storage
Provedor de dados: 42
Autores: CASSOL,FLÁVIA D.R.; FORTES,ANDRÉA M.T.; MENDONÇA,LORENA C.; BUTURI,CAMILA V.; MARCON,THAÍS R.
Beans are one of the most used foods to meet the energy needs of the Brazilian diet, requiring farmers to use high seed physiological potential. The aim was to evaluate the physiological quality of beans stored for 360 days. Analyses were performed at 0, 30, 90, 180, 270, and 360 days after receiving the seeds (S1 and S2) and grains (G1 and G2) of BRS Splendor. Tests of germination, accelerated aging, cold, speed of germination, average length of shoots, and root were performed. The experimental design was completely randomized split-plot in time and the means were compared through Tukey test at 5% probability. Seed germination was not affected in S2, while the drop in S1 and G1 was significant. The vigor of grains from field 1 declined from 91 to 50% and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Phaseolus vulgaris L.; Physiological quality; Vigor.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000301069

Morphophysiological and biochemical alterations in Ricinus communis L. seeds submitted to cobalt60 gamma radiation
Provedor de dados: 42
Autores: LOPES,AMANDA M.; BOBROWSKI,VERA L.; SILVA,SERGIO D. DOS ANJOS E; DEUNER,SIDNEI.
ABSTRACT This study aimed to evaluate the radiosensitivity of castor bean seeds after applications of different doses of Cobalt60 gamma radiation. Seeds were pre-soaked for 24 hours in distilled water and then irradiated with 50, 100, 150, and 200 Gy, except the control. Sowing was performed in trays, which contained soil as substrate and were maintained in a greenhouse. The electrical conductivity, emergence, emergence speed index, growth parameters and activities of antioxidant enzymes (superoxide dismutase, ascorbate peroxidase, and catalase) were evaluated in the leaves and roots of castor bean seedlings. Gamma radiation did not affect the electrical conductivity of the seeds; however, at a dose of 200 Gy, the emergence and emergence speed index of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Castor bean; Radiosensitivity; Germination; Growth; Antioxidant enzymes.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401925

Post-seminal development and morphoanatomy of vegetative and reproductive organs in Stevia rebaudiana (Bert.) Bertoni (Asteraceae)
Provedor de dados: 42
Autores: ROSSI,MÔNICA L.; SOUZA,EVERTON H.; GRANER,ERIKA M.; ALMEIDA,MARCÍLIO DE; MARTINELLI,ADRIANA P.
Abstract Stevia rebaudiana belongs to the Asteraceae family with high economic and medicinal potential. This article describes and illustrates morphological and histological aspects of leaves and reproductive organs, and the germination process, to provide detailed information on this species and to contribute to taxonomic, phylogenetic and pharmacobotanical projects. The fruit is a cypsela, small, simple, dry, indehiscent, monospermic, light or dark colored, with aristate pappus, and the seed presents a spatulate axile embryo. Germination is phaneroepigeal with a pivotal root system and many absorbing root hairs. The leaves are simple, elliptical to obovate, with two types of trichomes (glandular and tector), with a short petiole, exhibiting an opposite...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Germination; Light microscopy; Morphology; Scanning electron microscopy.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502167

The effect of temperature on the germination of Melocactus violaceus Pfeiff. (Cactaceae), a threatened species in restinga sandy coastal plain of Brazil
Provedor de dados: 42
Autores: ZAMITH,LUIZ R.; CRUZ,DENISE D.; RICHERS,BARBARA T.T.
Melocactus violaceus is an endangered species due to habitat destruction and the overcollection of this species for ornamental use. The aim of this study was to test the effect of different temperatures on the germination of M. violaceus. Three treatments were conducted: a constant temperature of 25ºC, a 20-35ºC alternating temperature, both inside germination chamber, and an alternating temperature under room temperature (mean temperature ranged from 25-37ºC). The final seed germination rates at the alternating temperature treatments were not significantly different (65% in the seed germinator and 62.5% at room condition). However, both treatments with alternating temperatures had significantly higher germination rates compared to the treatment kept at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cactaceae; Conservation; Germination; Melocactus violaceus; Restinga; Temperature.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200615

Germination behaviour of seeds from herbicide treated plants of Chenopodium album L.
Provedor de dados: 42
Autores: Tanveer,Asif; Nadeem,Muhammad A.; Ali,Asghar; Tahir,Muhammad; Zamir,Muhammad S.I.
The carry-over effect of sub-lethal herbicides was investigated on the germination of seeds collected from surviving Chenopodium album plants, which had received 1/8, 1/8 twice, 1/8 three times, 1/4, 1/2, 1/1 doses of either pre-emergence ioxynil or post-emergence bentazone in a previous onion (Allium cepa) crop. Seeds were also collected from surviving C. album plants, which had received 1/4, 1/2, 1/1 of either pre-emergence pendimethalin, propachlor and linuron, or 1/8, 1/8 twice, 1/8 three times, 1/4, 1/2, 1/1 of post-emergence ioxynil or linuron in a previous leek (Allium porrum) crop. Seeds of surviving plants were collected and tested for germination at temperature of 5, 10, 15, 20 and 25°C. The effect of different temperatures on the total number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicides; Sub-lethal doses; Onion; Leek; Germination.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400022

Effects of the seed predator Acanthoscelides schrankiae on viability of its host plant Mimosa bimucronata
Provedor de dados: 48
Autores: TOMAZ,CAMILA A; KESTRING,DÉBORA; ROSSI,MARCELO N.
Seeds of Mimosa bimucronata are heavily infested (pre-dispersal predation) by the bruchid beetle Acanthoscelides schrankiae in Brazil. In this study, firstly we set up experiments to assess seed germination under seven and six different light and temperature regimes, respectively, and then we evaluated the ability of seeds to germinate after predation. We tested the hypothesis that the non-predated seeds from infested fruits may respond differently when set for germination than those seeds of non-infested fruits. We also hypothesized that predation may increase the production of unviable seeds. Seeds under 18 hours of light presented the highest percentage of germination, and the alternating temperature 20-30 °C was considered as optimum for germination...
Tipo: Journal article
Palavras-chave: Acanthoscelides schrankiae; Bruchidae; Germination; Mimosa bimucronata; Seed predation.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000400002

Seed germination of Agave species as influenced by substrate water potential
Provedor de dados: 48
Autores: Ramírez-Tobías,Hugo M; Peña-Valdivia,Cecilia B; Trejo,Carlos; R,J Rogelio Aguirre; Humberto Vaquera,H.
BACKGROUND: Plants of Agave spp. perform Crassulacean acid metabolism (CAM) and are highly drought-tolerant, but little is known concerning seed germination under low water availability. The aim of this study was to assess the effect of substrate water potential (&amp;#936;W) on seed germination and contrast hydrotime parameters of seven valuable and commercially-important Agave species from different geographical distributions and climatic regions of Mexico. Our hypothesis was that seed germination of Agave species is not affected by low water availability independently of seed biomass and the climate of their distribution area. RESULTS: Seed germination (at 25°C and in the dark) between 85 and 100% for all species occurred within 80 - 180 h at -0.03 MPa...
Tipo: Journal article
Palavras-chave: Base water potential; CAM; Drought; Germination; Hydrotime model; Maguey.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100011

Statistical studies on anatomical modifications in the radicle and hypocotyl of cotton induced by NaCl
Provedor de dados: 48
Autores: CASENAVE,ESTER C; DEGANO,CLAUDIA AM; TOSELLI,MARIA E; CATAN,ESTELA A.
Salinity affects extensive arid and semiarid areas all over the world, producing diminished yields of many crops. Even though there is a variety of research and reviews related to physiological and anatomical modifications produced in salinity-tolerant species, today there are different points of view in relation to this topic, and especially due to technical limitations, there are few articles in which anatomical modifications have been quantified. The aim of this research is to quantitatively and statistically evaluate the modifications that are produced in radicles and hypocotyles of cotton seedlings growing in NaCl concentrations that affect the early ontogenetic stages of this crop. Germination of two varieties of cotton at increasing concentrations...
Tipo: Journal article
Palavras-chave: Anatomical changes; Cotton; Germination; Growth; Salinity.
Ano: 1999
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97601999000400008

Morphological characterization of fruit, seeds and seedlings of white-seal (Chrysophyllum rufum Mart. -Sapotaceae)
Provedor de dados: 49
Autores: Lima,Liliane Ferreira; Lima,Renata Gabriela Vila Nova de; Ferreira,Angélica Cândida; Almeida Jr.,Eduardo Bezerra de; Zickel,Carmen Silvia.
Abstract Chrysophyllum is the second largest genus of Sapotaceae, with 81 species distributed in the neotropics. Little data are found in the literature regarding the morphology of seedlings and the early development of this genus. This study aims to morphologically characterize the fruit, seeds and seedlings of Chrysophyllum rufum Mart. Fruits were collected from individuals present in two fragments of the Atlantic Forest, Pernambuco. A sample of 100 seeds and 100 fruits was randomly selected to obtain the morphological data. The seeds were sown in plastic trays in a greenhouse. The fruits are bacoid, obovoid and globose with one or two functional seeds per fruit. The seeds are obovate, with the shape of the hilum ranging from elliptical transverse to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Morphological description; Germination; Propagules; Atlantic Rainforest.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000400201

Efecto de las vinazas sobre la germinación de soja, trigo y quinoa en condiciones controladas
Provedor de dados: 51
Autores: González,Juan A; Languasco,Paola; Prado,Fernando E.
Las vinazas, derivadas de la producción de alcohol (etanol), encierran la posibilidad de ser utilizadas como fuente de agua y nutrientes. En este estudio se investigó el efecto de las vinazas sobre la germinación y alargamiento radicular en tres especies: Glycine max ("soja"), Triticum aestivum ("trigo") y Chenopodium quinoa ("quinoa"). Se utilizaron vinazas puras y vinazas diluidas (1:1; 1:5; 1:10 y 1:20) tanto a pH ácido (pH 4,5) como a pH neutro. Los resultados demuestran que las vinazas puras inhiben totalmente la germinación en las tres especies utilizadas. En la dilución más baja (1:1) la germinación de soja y quinoa resultaron nulas mientras que en trigo se atrasó y logro un porcentaje de germinación final del 42%. En resumen, los resultados...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vinazas; Germinación; Alargamiento radicular; Vinasse; Germination; Radical elongation.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722014000400005

Is the enhancement produced by priming in cottonseeds maintained during storage?
Provedor de dados: 53
Autores: Toselli,María Eugenia; Casenave,Ester Celina.
The objective of this study was to evaluate: a) whether the effects of hydropriming and osmopriming in manitol on cottonseed germination are maintained during their storage; b) whether the behavior of the treated seeds -in storage- depends on the type of priming substrate used; c) whether seeds from different harvest years [age] have a similar response. The effects of 16 h of hydropriming and 41 h in mannitol were tested at 18 and 25 ÂºC on the velocity of germination, standard germination and the vigor in cottonseeds from the 2007 and 2008 harvests, and within 0, 6 and 12 months of postpriming storage. The enhancement produced by the priming treatments used remained at least for 6 months in the case of hydropriming and 12 months for osmopriming in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium hirsutum; Priming; Germination; Vigor; Year of harvest; Storage.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000400004

Damage caused by fungi and insects to stored peanut seeds before processing
Provedor de dados: 53
Autores: Santos,Franciele dos; Medina,Priscila Fratin; Lourenção,André Luiz; Parisi,João José Dias; Godoy,Ignácio José de.
Abstract The aim of this study was to gather data on the incidence of fungi associated with peanut seeds stored in their pods, before being processed by the State of São Paulo seed-producing companies, and the relation of the fungi to the seed damage caused by insects and to the quality of the stored seeds. Samples were taken from seed lots of cultivars IAC 886 and IAC 503 stored by these companies at the beginning and end of a six-month storage period. The peanut seeds were shelled and half of each sample was treated with fludioxonil + metalaxyl. Untreated and treated seeds were analyzed for moisture content, germination, vigor and health. The following insects were found to damage the peanut seeds: Cyrtomenus mirabilis (Perty) (Hemiptera: Cydnidae) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis hypogaea L.; Germination; Vigor; Cyrtomenus mirabilis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200184

Germination, carbohydrate composition and vigor of cryopreserved Caesalpinia echinata seeds
Provedor de dados: 52
Autores: Zanotti,Rafael Fonsêca; Motta,Ludymila Brandão; Bragatto,Juliano; Labate,Carlos Alberto; Salomão,Antonieta Nassif; Vendrame,Wagner A.; Cuzzuol,Geraldo Rogerio Faustini.
The present study investigated the germination and vigor of Caesalpinia echinata (Brazilwood) seeds stored at negative temperatures. Recently harvested seeds were cryopreserved at -18º or -196ºC and periodically evaluated for germination, seed vigor and carbohydrate composition. The temperatures did not influence the germination percentages or vigor. The germination percentage decreased from 88% in recently harvested seeds to 60% after 730 days of storage. The different temperature and storage times tested did not affect the vigor seed germination as indicated by the measures of plant growth and survival. The different temperatures used did not cause changes in the carbohydrate composition. The tegument cell walls were rich in lignin, arabinose and xylose....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazilwood; Carbohydrate; Conservation; Germination; Seed bank; Storage.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500004

Micropropagation of Alibertia edulis Rich
Provedor de dados: 52
Autores: Silva,Fernanda Augusta Boato da; Pereira,Luiz Alfredo Rodrigues; Silveira,Conceição Eneida dos Santos.
The aim of this work was to develop a micropropagation protocol for Alibertia edulis, a medicinal Brazilian Cerrado plant. A. edulis seeds were sterilized and germinated in water-agar. Fifteen millimeter long explants from the seedlings cultivated for 50 days were used for the multiplication in three consecutive subcultures. The cytokinin benzyladenine (BA) alone or combined with indole-3-butyric acid (IBA) was added to ¼ MS medium. The treatments containing combinations of the BA + IBA induced more shoot proliferation than the BA alone, with the optimum concentration of 0.5 mg.L-1 for both growth regulators. A. edulis shoots elongated easily and the presence of growth regulators did have a positive effect on the shoot elongation. Consecutive subcultures...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Alibertia edulis; Rooting; Germination; Activated charcoal.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600004

Effects of light and temperature on seed germination in Cecropia hololeuca Miq. (Cecropiaceae)
Provedor de dados: 52
Autores: Godoi,Simone; Takaki,Massanori.
Seeds of Cecropia hololeuca were submitted to regimes of constant and alternating temperatures, associated with photoperiods of white light, "shade light" and continuous darkness under controlled conditions in laboratory. Seeds did not germinate at constant temperatures of 10°C to 20°C and above 35°C. Seeds only germinated in the darkness when the temperature was alternated. "Shade light" inhibited germination. We concluded that the regime of alternating temperatures suppressed the light effects on seed germination of this species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cecropia hololeuca; Germination; Alternating temperature; Phytochrome; Light.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200004

Dormancy breaking and germination of Enterolobium contortisiliquum (Vell.) Morong seed
Provedor de dados: 52
Autores: Malavasi,Ubirajara Contro; Malavasi,Marlene de Matos.
Enterolobium contortisiliquum (Vell.) Morong. is a Mimosaceae tropical tree species recommended for heterogeneous reforestation of degraded tropical areas. "Timburi" seeds present low germination due to the high degree of seed dormancy. Different methods to overcome seed dormancy was compared: sanding, sanding followed by 24 hours water (25ºC) soaking, imbibition in boiling water followed by exposure to water at room temperature (28ºC), and concentrated sulfuric acid (5, 15, 30, 60, 120 or 180 minutes) followed by washing with tap water. All seeds were germinated in rolled towels at 25ºC and 12 hours photoperiod. Total germination, first count of germination test and germination velocity index were recorded. Mechanical scarification (sanding), chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dormancy; Forest nursery; Germination; Seed.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600003

Lowering of phytic acid content by enhancement of phytase and acid phosphatase activities during sunflower germination
Provedor de dados: 52
Autores: Agostini,Juliana da Silva; Nogueira,Rosicler Balduíno; Ida,Elza Iouko.
The objective of this work was to investigate the germination of hybrid sunflowers BRS191 and C11 as a means of lowering phytic acid (PA) content by enhancing the activity of endogenous phytase and acid phosphatase. The concentration of PA in hybrid sunflower achenes varied from 2.16 to 2.83g/100g of sample (p &lt; 0.05). The phytase and acid phosphatase activities of sunflowers BRS191 and C11 were the highest on the 4th and 5th days of germination, respectively, with the release of the phosphorus. These results indicated that hybrid sunflower PA reduced and enhance phytase activity at distinct germination periods, which could open up the possibility of applying these enzymes in the control of PA content in cereals, thus improving their nutritional value.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Sunflower hybrids; Phytic acid; Phytase; Acid phosphatase.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400028

Effects of light and nutrients on different germination phases of the Cosmopolitan moss Bryum argenteum Hedw. (Bryaceae)
Provedor de dados: 52
Autores: Silva,Adaíses Simone Maciel da; Pôrto,Kátia Cavalcanti; Simabukuro,Eliana Akie.
The influence of light and nutrients on the different germination phases of Bryum argenteum spores was studied. The following treatments were used: distilled water and nutrient solution under light (12 h) and continuous darkness. The spores germinated when exposed to light, independent of both medium used. Under darkness, the spores swelled and became chlorophyllous. In the presence of nutrient solution, the germination occurred earlier (after two days) when compared to the distilled water (after more than three days). Nutrients were needed to complete the last germination phase in the majority of spores and to provide the protonemal growth.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bryophyte; Physiology; Germination; Protonema; Light; Nutrients.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400003

Monitoring the effect of pyrene on the germination and radial growth of the wild and mutant strains of Rhizopus arrhizus UCP402
Provedor de dados: 52
Autores: Shiosaki,Ricardo Kenji; Albuquerque,Clarissa Daisy da Costa; Okada,Kaoru; Fukushima,Kazutaka; Campos-Takaki,Galba Maria.
The physiological mutant of Rhizopus arrhizus was obtained in the pyrene resistance gradient test. Comparative studies were carried out about the behavior of the germination process and the radial growth of the mutant and wild strains of R. arrhizus UCP 402. Sabouraud Sucrose and Yeast Malt Broth cultures containing pyrene (10 mg/L) induced the germination process of the sporangiospores of the wild and mutant strains of R. arrhizus. The radial growth of the strains was inversely proportional to the pyrene concentration in the culture medium. The results showed an adaptation of R. arrhizus UCP 402x (mutant) in the pyrene (50mg/L) and suggested a higher ability of application in the removal of pyrene from the contaminated areas.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyrene; Rhizopus arrhizus; Mutant; Radial growth; Germination.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300024

Spore germination of Gleichenella pectinata (Willd.) Ching (Polypodiopsida-Gleicheniaceae) at different temperatures, levels of light and pH
Provedor de dados: 52
Autores: Santos,Eunice Pereira Gonçalves dos; Lehmann,Débora Rosana Marques; Santos,Marisa; Randi,Áurea Maria.
This study investigated the effects of different temperatures (25 and 30 ± 2 ºC), light levels (62, 42, 22 and 5% of natural light), and pH (4.0, 4.5, 5.0, 5.5, 6.0 and 6.7) on the spore germination of Gleichenella pectinata. To accomplish this, the spores were surface sterilized and sown in bottles containing mineral medium. The spores of G. pectinata are monolets and the perispore surface can show large and irregular deposits. During germination, filamentous gametophytes with and without developing rhizoids were observed. Only gametophytes which presented developed rhizoids were able to reach the heart-shaped developmental stage. Based on the collection, the rate of and gametophyte development were generally very low. The relative germination rates were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gleichenella pectinata; Germination; Light; PH; Temperatures.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600007

Compositional changes of proteins and amino acids in germinating coffee seeds
Provedor de dados: 52
Autores: Shimizu,Milton Massao; Mazzafera,Paulo.
Endosperm is the main reserve tissue in coffee seeds. Coffee (Coffea arabica L.) seeds were germinated for six weeks and qualitative and quantitative changes in amino acids and proteins were investigated. The total content of free amino acids were reduced during germination, however, protein content remained constant. SDS-PAGE profiles showed that legumin-like proteins became less stained in the last weeks. Asparagine, glutamic acid, aspartic acid, alanine and lysine were the major free amino acids, although serine and glutamine were also significant. Except for tyrosine, which increased with germination, all other amino acids were reduced. Analysis of the amino acid composition of the total soluble protein showed glutamic acid/glutamine and glycine as the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Coffea arabica; Endosperm; Germination; Protein; Seeds.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300003

Allelopathic potential of orsellinic acid derivatives
Provedor de dados: 52
Autores: Peres,Marize Terezinha Lopes Pereira; Mapeli,Ana Maria; Faccenda,Odival; Gomes,Alcir Teixeira; Honda,Neli Kika.
Environmental degradation caused by the excessive use of pesticides has motivated studies aimed at the discovery of new formulations for pest control. The bioassays carried out under laboratory conditions for the present study involved the germination and seedling growth of Lactuca sativa cv. Grand Rapids and Allium cepa cv. Baia Periforme treated with lecanoric acid or one of seven esters obtained from the alcoholysis of the acid. Each substance was tested at concentrations of 10-3, 10-5, 10-7 M, and 10-9 M. The results revealed that, except for lecanoric acid and methyl orsellinate, all other compounds exhibited significant differences in their action when compared with the controls. Also, A. cepa was more sensitive to the compounds assayed, at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Germination; Growth; Lactuca sativa; Allium cepa; Orsellinates.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400027

The effect of red light on the germination of a Brazilian Pteridophyte
Provedor de dados: 52
Autores: Colli,Áurea M. T.; Perez,Sonia C. J. G. de A.
The effects of red light on the germination of spores of Cheilantes concolor Langsd &amp;amp; Fisch were investigated in this study. The spores were spread in the Mohr (1956) nutritional solution after Dyer’s modifications (1979). Three Petri dishes were used for each treatment, three slides per dish were made for each day of treatment, and one hundred spores per slide were counted . Germination of the spores in the dark was not observed. In relation to the photoperiods, the highest germination percentage and index values were obtained with the exposure of the spores to photoperiods of 8h, and the lowest values were obtained with their exposure to photoperiods of 2h. The phytochrome pigment acts in the germination of the spores through low fluency...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Red light; Far-red light; Spores; Pteridophyte.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200006

Effect of salt and osmotic stresses on the germination of pepper seeds of different maturation stages
Provedor de dados: 52
Autores: Demir,Ibrahim; Mavi,Kazım.
Germination percentage, seedling fresh weight and sensitivity index of the pepper (Capsicum annuum L. cv. Sera Demre) seed lots harvested 50, 60 and 70 days after the anthesis (daa) in 2001 and 2002 were determined under the salt (NaCl) and osmotic (PEG) stresses at the same water potentials of -0.3, -0.6 and -0.9 MPa. The objective was to study whether the germination and seedling growth were inhibited by the salt toxicity or osmotic effect during the development. The higher the salt and osmotic stress concentrations the lower was the germination percentage and seedling fresh weight. The seed germination was higher and sensitivity index were lower in NaCl than in PEG at the same water potential and harvest in both the years. They were able to germinate at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; Salinity; Water stress; Germination.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500004

Effect of ABA and GA3 on protein mobilization in embryos and cotyledons of angico [Anadenanthera peregrina (L.) speg] seeds during germination
Provedor de dados: 52
Autores: Barduche,Douglas; Paiva,Renato; Lopes,Mauricio A.; Paiva,Edilson.
In this work, a woody species [A. peregrina (L.) Speg.] was studied in order to observe the effect of ABA and GA3 at the biochemical level during the process of seed germination. Embryos incubated in sucrose solution containing ABA and/or GA3 were analyzed through SDS-PAGE to observe the mobilization pattern of storage proteins during the beginning of germination. Cotyledons isolated from seeds incubated in aqueous solutions containing ABA and/or GA3, were also analyzed through SDS-PAGE and by PAGE/Activity Gels (polyacrylamide gels copolymerized with substrate for enzymes) to observe the mobilization pattern of storage proteins and protease activity after the beginning of the germination. Results of these experiments show that ABA blocks protein...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ABA; GA3; Germination; Protein pattern; Protease activity; Tropical woody plant.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200002

Germination of Senna Occidentalis link: seed at different osmotic potential levels
Provedor de dados: 52
Autores: Delachiave,Maria Elena Aparecida; Pinho,Sheila Zambello de.
The objective of this research was to study the effect of osmotic potential and salinity on the germination of seeds of Senna occidentalis, with and without a change of solutions. The percentage and rates of germination decreased according to decrease of potential, being more drastic when the substitutions of solutions were not made. The largest reductions were observed with the PEG solutions, with and without substitutions.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Seed; Osmotic potential; Senna occidentalis.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200004

Water stress induced by mannitol and sodium chloride in soybean cultivars
Provedor de dados: 52
Autores: Machado Neto,Nelson Barbosa; Saturnino,Sérgio Marques; Bomfim,Daniel Carlini; Custódio,Ceci Castilho.
Four soybean (Glycine max L. Merril.) cultivars were contrasted in relation to germination and vigour of seedlings, when seeds were submitted to water stress induced by mannitol or sodium chloride. Water stress affected seed germination and seedling development, however, seedling development was affect in higher osmotic potential (-0.3MPa) than the necessary to affect germination -1.2MPa when induced by mannitol or -0.6MPa when induced by sodium chloride. 'Pioneira' and 'Xingu' cultivars had high development in low water availability and/or salinity conditions.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Tolerance; Salinity; Germination; Vigour.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400004

Impact of water potential on growth and germination of Fusarium solani soilborne pathogen of peanut
Provedor de dados: 58
Autores: Palacios,Sofia; Casasnovas,Francisco; Ramirez,María L.; Reynoso,María. M.; Torres,Adriana M.
Studies were conducted to determine the effect of osmotic and matric stress on germination and growth of two Fusarium solani strains, the etiological agent responsible of peanut brown root rot. Both strains had similar osmotic and matric potential ranges that allowed growth, being the latter one narrower. F. solani showed the ability to grow down to -14 MPa at 25 °C in non-ionic modified osmotic medium, while under matric stress this was limited to -8.4 MPa at 25 °C. However, both strains were seen to respond differently to decreasing osmotic and matric potentials, during early stages of germination. One strain (RC 338) showed to be more sensitive to matric than osmotic (non ionic) and the other one (RC 386) showed to be more sensitive to osmotic than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium solani; Germination; Growth; Matric potential; Osmotic potential; Peanut brown root rot; Soilborne pathogen.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300046

Coffee seed physiology
Provedor de dados: 61
Autores: Eira,Mirian T. S.; Silva,E. A. Amaral da; De Castro,Renato D.; Dussert,Stéphane; Walters,Christina; Bewley,J. Derek; Hilhorst,Henk W. M.
Considerable advances in our understanding of coffee seed physiology have been made in recent years. However, despite intense research efforts, there are many aspects that remain unclear. This paper gives an overview of the current understanding of the more important features concerning coffee seed physiology, and provides information on recent findings on seed development, germination, storage and longevity.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea; Coffee; Germination; Germplasm; Longevity; Seed development; Storage.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100011

Differential water uptake kinetics in axes and cotyledons during seed germination of Vigna radiata under chilling temperature and cycloheximide treatment
Provedor de dados: 61
Autores: Chakraborty,R.; Kar,R.K.
Water uptake kinetics of axes and cotyledons of Vigna radiata seeds has been studied during incubation at chilling temperature (4°C) and under cycloheximide treatment. Germination rate of scarified seeds was faster than intact seeds, which can be correlated with their comparative water uptake kinetics. Chilling temperature during incubation significantly slowed down water uptake by both intact and scarified seeds. Treatment with cycloheximide was also somewhat effective in retarding water uptake, but only in scarified seeds. Water uptake by axes isolated from intact seeds (attached or detached from the cotyledons) was inhibited completely by chilling temperature as well as by cycloheximide treatment while these treatments were ineffective in preventing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chilling treatment; Cycloheximide; Germination; Water uptake; Vigna radiata seeds.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000400003

Adaptability and leaf anatomical features in oil palm seedlings produced by embryo rescue and pre-germinated seeds
Provedor de dados: 61
Autores: Luis,Zanderluce G.; Bezerra,Kadja Milena G.; Scherwinski-Pereira,Jonny Everson.
Changes in the leaf structure of plants grown in different conditions have been reported, such as increase in size and density of stomata and reduction in stomatal control, amount of epicuticular wax, and mesophyll thickness, with a high diversity of intercellular spaces. However, these changes are highly variable depending on the physiological and morphological characteristics of each species. The objective of this work was to analyze the adaptability and anatomical plasticity of oil palm seedlings produced after embryo rescue and pre-germinated seeds. Expanded leaves were prepared for evaluation of morphometric data and anatomical structures. It was verified that the environmental conditions in vitro negatively influenced the stomata density, epidermal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Elaeis guineensis; Arecaceae; Germination; Embryo culture; Acclimatization; Plantlets metabolism.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000300008

Impact of saline water stress on nutrient uptake and growth of cowpea
Provedor de dados: 61
Autores: Patel,Prakash R.; Kajal,Sushil S.; Patel,Vinay R.; Patel,Vimal J.; Khristi,Sunil M.
Soil salinity is a major limitation to crops production in many areas of the world. The present study reports the impact of salt stress on seeds germination, plant growth parameters and leaf ions accumulation in three cowpea Vigna unguiculata (L.) Walp Indian cultivars: Akshay102, Gomti vu-89 and Pusa Falguni. The electrical conductivity (EC) of the soil was 0.75 dS m−1 and the NaCl treatments increased it to 2, 4, 6, 8 and 10 dS m−1. Germination percentage was recorded 10 days after sowing, while shoot and root dry weights were measured in 45 days old plants. Leaf ion concentrations for Na+, K+, Ca2+, Cl− and proline content were determined. The results showed that the germination percentage of seeds was highly affected by salinity in all cultivars in all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salt stress; Germination; Proline; Potassium/sodium ratio.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000100005

Germination of dormant seeds of Stylosanthes humilis as promoted by ethylene accumulation in closed environments
Provedor de dados: 61
Autores: Ribeiro,Dimas Mendes; Barros,Raimundo Santos.
Germination of scarified dormant seeds of Townsville stylo (Stylosanthes humilis) is very low in Petri dishes, but may be appreciable in sealed Erlenmeyer flasks if ethylene accumulates in their atmospheres. When ethylene in the flask atmosphere was fixed by a mercuric perchlorate solution, emanation of the gaseous regulator and germination of dormant seeds were drastically decreased. On the other hand, ethylene produced by dormant seeds and accumulated in the flask atmosphere led to a further enhancement of ethylene accumulation and a corresponding increased seed germination. Germination of both dormant and non-dormant seeds did not occur when ethylene biosynthesis was completely blocked.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Townsville stylo; Closed environments; Dormancy; Ethylene; Germination; Seeds.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000200003

Some thoughts on the physiology of caffeine in coffee: and a glimpse of metabolite profiling
Provedor de dados: 61
Autores: Baumann,Thomas W.
Human beings enjoy the flavor and stimulating activity of a cup of coffee without knowing that by doing so, they are part of a 'food web' and receive signals coffee plants build to improve their struggle for life. This review is centered in the first part on the purine alkaloid caffeine and its physiological role in the coffee plant's life cycle. Many of the thoughts and ideas presented here are plain speculation, because the real research revealing the secrets of plant physiology such as e.g. the formation of the coffee bean with all its ingredients, has just started. The recent achievements in molecular biology made it possible to tackle and answer new questions regarding the regulation of secondary metabolism in the coffee plant organs at selected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endosperm; Flower; Germination; Metabolite profiling; Purine alkaloid; Perisperm.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100017

Endo-beta-mannanase from the endosperm of seeds of Sesbania virgata (Cav.) Pers. (Leguminosae): purification, characterisation and its dual role in germination and early seedling growth
Provedor de dados: 61
Autores: Lisboa,César Gustavo Serafim; Tonini,Patrícia Pinho; Tiné,Marco Aurélio Silva; Buckeridge,Marcos Silveira.
Galactomannans are storage cell wall polysaccharides present in seeds of some legumes. Their degradation is carried out by three hydrolases (alpha-galactosidase (EC 3.2.1.22), endo-beta-mannanase (EC 3.2.1.78) and ß-mannosidase (EC 3.2.1.25)). In the present study we purified and characterised an endo-beta-mannanase from seeds of Sesbania virgata and addressed its role in germination and seedling development. The polypeptide purified by Ion Exchange Chromatography and Affinity Chromatography on Sepharose-Concanavalin A, showed a pH optimum between 3.5 and 5 at 45ºC and high stability at pH 7.8. The low stability at pH 5 appears to be associated with isoelectric precipitation, in view of the pI of the enzyme being 4.5. The purified enzyme is a glycoprotein...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sesbania virgata; Endo-beta-mannanase; Galactomannan; Germination; Leguminosae.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200003

Effects of prescribed fires on the survival and release of seeds of Kielmeyera coriacea (Spr.) Mart. (Clusiaceae) in savannas of Central Brazil
Provedor de dados: 61
Autores: Cirne,Paulo; Miranda,Heloisa Sinátora.
Effects of prescribed fires on survival and release of seeds of the woody species Kielmeyera coriacea (Clusiaceae) were investigated in two plots of cerrado sensu stricto, a savanna vegetation of Central Brazil. The first plot was burnt in June, at the beginning of the dry season, and the second in August, in the middle of the dry season. Seed survival was measured after fire in both areas and related to internal and external fruit temperatures measured during the June fire. The proportion of open fruits per individual of K. coriacea was also assessed at two-week intervals. Maximum external temperatures during fire (393 to 734ºC) were strongly reduced inside the fruits (61 to 63ºC). Before the June fire, the majority of the fruits were closed in both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Fire season; Fruit temperature; Germination; Seed release.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000300004

Methods to Break Seed Dormancy of Rhynchosia capitata, a Summer Annual Weed
Provedor de dados: 117
Autores: Haider Ali,Hafiz; Tanveer,Asif; Ather Nadeem,Muhammad; Naeem Asghar,Hafiz.
Dormancy of weed seeds is a significant feature contributing to their survival rate since it helps the weeds to avoid herbicides and other weeding practices along with unfavorable environmental conditions. We investigated the effects of different dormancy breaking treatments on the germination of Rhynchosia capitata, a common summer annual weed, which is emerging as a weed threat in Pakistan. Seeds were soaked in thiourea, KNO3, HCl, HNO3, and H2SO4, and they were also mechanically scarified (sandpaper). Results indicated that R. capitata seeds show signs of physical dormancy that is mainly due to the impermeability of their coat. Mechanical scarification and acid scarification (soaking of seeds in H2SO4 for 60 and 80 min and in HCl for 12 and 15 h) were...
Tipo: Journal article
Palavras-chave: HCl; HNO3; H2SO4; Dormancy; Germination.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300021

Endogenous Quantification of Abscisic Acid and Indole-3-Acetic Acid in Somatic and Zigotic Embryos of Nothofagus alpina (Poepp. &amp;amp; Endl.) Oerst
Provedor de dados: 117
Autores: Cartes Riquelme,Pricila; Ríos Leal,Darcy; Sáez Carrillo,Kátia; Uribe Moraga,Matilde; Valenzuela Aguilar,Sofía; Joseph Bolus,Stephen; Sánchez Olate,Manuel.
Abscisic acid (ABA) and indole-3-acetic acid (IAA) participate in the propagation of plants by somatic embryogenesis, causing polar structural differentiation of the embryo. The goal of the assay was to compare endogenous levels of ABA and IAA between somatic embryos (SE) and zygotic embryos (ZE) of Nothofagus alpina (Poepp. &amp;amp; Endl.) Oerst. In this study, a somatic embryo maturation assay involving the addition of varying concentrations of exogenous ABA was performed on cotyledonary-stage of N. alpina. Furthermore, the endogenous levels of ABA and IAA were quantified in the immature ZE, the mature ZE, and the embryonic axis of a mature embryo of N. alpina. The current study utilized high performance liquid chromatography (HPLC) for quantification....
Tipo: Journal article
Palavras-chave: Somatic embryogenesis; Maturation; Germination; HPLC.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400007

Potassium nitrate on overcoming dormancy in Brachiaria humidicola ‘BRS Tupi’ seeds
Provedor de dados: 65
Autores: Libório,Cláudia Barrios de; Verzignassi,Jaqueline Rosemeire; Fernandes,Celso Dornelas; Valle,Cacilda Borges do; Lima,Natalia Dias; Monteiro,Lenise Castilho.
ABSTRACT: In this study, the aim was to determine the influence of potassium nitrate, using different concentrations and immersion times on the dormancy of the seeds of Brachiaria humidicola cv. ‘BRS Tupi’. Four experiments were performed adopting a factorial scheme (5x3+1) in different seed lots, for different post-harvest storage durations, during which the seeds were immersed in potassium nitrate solutions of different specific concentrations (0, 0.1, 0.3, 0.5 and 1% KNO3), for three exposure periods (12, 24 and 48h), plus one control (untreated), in a completely randomized design. The characteristics assessed included the imbibition curve, germination, first count and germination rate, as well as viability confirmed by using tetrazolium test. From the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Forage; Chemical treatment.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600201

Antioxidant activity of corn seeds after thermal stress
Provedor de dados: 65
Autores: Marini,Patrícia; Bandeira,Juliana de Magalhães; Borba,Isabel Cristina Gouvea de; Martins,Andrea Bicca Noguez; Moraes,Dario Munt de; Amarante,Luciano do; Villela,Francisco Amaral.
The aim of this research was to analyze the effect of different temperatures on physiological quality and relate the responses with the antioxidant activity of three lots of corn seeds. The seeds from three lots were exposed for 24h at temperatures of 15, 25, 35 and 40°C and then evaluated for percentage, speed index and first germination count, as well as early growth and activity of antioxidant enzymes in the seedlings. The experimental design was completely randomized with four replications, with subsequent polynomial regression analysis. The results showed that the seeds from the three lots of corn exposed to temperatures of 15 and 40°C, were of better high physiological quality (vigor), which explains the low activity of enzymes of the antioxidant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Temperature; Germination; Growth.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000600002

Physiological quality of dual-purpose wheat seeds from plants subjected to artificial defoliation
Provedor de dados: 65
Autores: Rodolfo,Giselle Regina; Souza,Clovis Arruda; Coelho,Cileide Maria Medeiros; Belizario,Karla Katy.
ABSTRACT: Defoliation may play a role in source-sink relationships and reduce the physiological quality of seeds. The main goal of this research was to investigate the effect of successive defoliations on physiological quality of wheat seeds in 'BRS Umbu' and 'BRS Tarumã' cultivars. Two experiments were carried out using a complete randomized design with four replications. Treatments included plants without defoliation (0), and those where 1, 2, and 3 consecutives defoliations were applied. Seeds from each treatment originated from four different lots. Data were analyzed with one-way analysis of variance and means compared by Tukey test at 5% statistical probability. Germination was not affected by defoliation, or the number of cuts, but an effect on vigor...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Cuts; Germination; Accelerated aging.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100201

In vitro establishment of  Comanthera curralensis , "sempre viva" native of Chapada Diamantina - Bahia
Provedor de dados: 65
Autores: Albuquerque,Mara Márcia Sampaio; Brito,Alone Lima; Lima,Andressa Priscila Piancó Santos; Alvim,Bruno Freitas Matos; Santana,José Raniere Ferreira de.
ABSTRACT: The goal of the present study was to evaluate the germination, initial growth, and in vitro co-cultivation of  Comanthera curralensis Moldenke, a "sempre viva" native of the Chapada Diamantina state of Bahia. Full strength (MS) and half-strength MS (MS1/2) growth media supplemented with two different sucrose concentrations (15 and 30g L-1) were tested for germination and initial plant growth. Three different plant densities were tested by in vitro culture (8, 10 and 12 plants per container). MS1/2 medium with 15g L-1 sucrose resulted in a higher percentage of germination and plant growth for the in vitro establishment of C. curralensis. The use of 12 plants per container is indicated for cost reduction in C. curralensis in vitro production.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eriocaulaceae; Tissue culture; Germination; In vitro growth; Co-cultivation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600991

Influence of culture media in viability test of conidia of entomopathogenic fungi
Provedor de dados: 65
Autores: Francisco,Edimara Aparecida; Mochi,Dinalva Alves; Correia,Antônia do Carmo Barcelos; Monteiro,Antonio Carlos.
This work aimed at investigatimg whether the culture medium used in viability tests affects the conidial germination of Lecanicillium lecanii, Beauveria bassiana and Paecilomyces fumosoroseus isolates. The tests were performed on microscope slides containing one of the culture media: agar-water (AW), minimal medium (MM), potato-dextrose agar (PDA), potato-dextrose-1% yeast extract agar (PDAY), Sabouraud-dextrose-yeast extract agar (SDAY), and complete medium (CM). Three areas per slide were delimited and 0.05ml of a 5.5 x 105 conidia ml-1 suspension was applied to each area. One bioassay was performed for each isolate. Germination was determined after 15 hours of incubation at 26±0.5°C. The culture media influenced the germination of the species studied,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beauveria bassiana; Lecanicillium lecanii; Paecilomyces fumosoroseus; Germination; Microbial control.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000400043

Physiological response of marandu grass seeds exposed to NPK fertilizer
Provedor de dados: 65
Autores: Codognoto,Luciane da Cunha; Conde,Thassiane Telles; Maltoni,Kátia Luciene; Faria,Glaucia Amorim; Reis,André Rodrigues dos.
ABSTRACT:  To facilitate seeding process of forage species, a common practice is to mix seeds with fertilizers in monocropping and intercropping or in implementing integrated livestock production systems. However, in prolonged periods of contact, the fertilizer’s salinity and acidity negatively affect the seeds’ physiological quality. Therefore, this study intends to verify the effect of ten periods (0, 3, 6, 12, 24, 36, 48, 72, 96, and 120 hours) of exposure to granular NPK fertilizer 04-30-16 on the vigor and germination of Urochloa brizantha cv. Marandu seeds. The experiment was conducted in a completely randomized design with three replication. The fertilizer and seed mixture registered a negative effect on seed moisture content, electrical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria; Ionic effect; Germination; Osmotic effect; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600250

Seminiferous propagation in the selection of chestnut tree rootstocks
Provedor de dados: 65
Autores: Pio,Rafael; Melo,Evaldo Tadeu de; Bueno,João Pedro Sales; Silva,Luiz Fernando de Oliveira da; Peche,Pedro Maranha; Curi,Paula Nogueira.
ABSTRACT: Aiming the selection of rootstocks to produce seedlings, the objective of this study was to quantify the seminiferous propagation in chestnut seeds, with or without incisions. Nine cultivars were used (‘Ibuki’, ‘Isumo’, ‘Kinshu’, ‘Moriwase’, ‘Okuni’, ‘Senri’, ‘Taishowase’, ‘Tamatsukuri’ and ‘Tiodowase’) and two selections (‘KM-1’ and ‘KM-2’) of hybrid chestnut trees (Castanea crenata x Castanea sp.). An incision was held in half of chestnuts and the other half remained intact. Percentage of germination, emergence and root length were quantified. The germinated nuts were transplanted and were quantified the diameter and height of seedlings. Then, the chestnut selections ‘KM-2’ and ‘Jacutinga’ were grafted by the cleft grafting method, and were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Castanea crenata x Castanea sp.; Incision; Germination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100401

Physical and physiological quality of the  Lippia rotundifolia seeds according to the osmotic conditioning and electrical conductivity
Provedor de dados: 65
Autores: Meira,Messulan Rodrigues; Martins,Ernane Ronie; Resende,Luciane Vilela.
ABSTRACT:  Lippia rotundifolia is a native species of the Cerrado, endemic to the chain backbone and highly aromatic, whose essential oil has medicinal properties of high pharmacological value, but because it is a non-domesticated species, little is known about its spread. Due to its importance, the objective was to evaluate the effect of the osmotic conditioning on the physical and physiological quality of seeds. The experimental design was completely randomized with four replications of 100 seeds, being treatments consisted of two kinds of seeds (with and without tegument) subjected to ten days of immersion in water (0, 2, 4, 6, 12, 24, 48, 72, 96 and 120 hours). After each period, the seeds were submitted to the electrical conductivity test and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tea-of-pedestrian; Germination; Vigor test; Electrical conductivity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202096

Accelerated aging as vigor test for sunn hemp seeds
Provedor de dados: 65
Autores: Silva,Clíssia Barboza da; Barbosa,Rafael Marani; Vieira,Roberval Daiton.
ABSTRACT: This study aimed to determine the most appropriate method to assess the sunn hemp ( Crotalaria juncea L.) seed vigor in the accelerated aging test. Five seed lots from harvest 2007/2008 were evaluated for germination, vigor and seedling emergence in the field. Accelerated aging test was performed at 41°C during 48, 72 and 96 hours, with and without sodium chloride saturated solution. Then, the promising procedure was also performed for 2008/2009 and 2009/2010 harvests. In the traditional accelerated aging test, the no-uniform water acquisition by the seeds adversely affected results. Accelerated aging test with sodium chloride saturated solution is the most appropriate method to evaluate the physiological potential of sunn hemp seeds, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crotalaria juncea L.; Forage crop; Physiological potential; Germination; Standization.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100402

Fluid-dynamic behavior of flaxseed fluidized and spouted bed
Provedor de dados: 65
Autores: Santana,Elza Brandão; Valente,Maria da Conceição da Costa; Corumbá,Lorena Gomes; Andrade,Elisangela Lima; Costa,Cristiane Maria Leal; Faria,Lênio José Guerreiro de.
ABSTRACT: Processing of particles in a moving bed, such as a fluidized bed or a spouting bed, is commonly used in the operations of drying, coating, and granulation of particulate systems. This process has applications in the chemical, pharmaceutical and, presently, agronomical industries, especially for seed treatment/coating. This research aimed to analyze the fluid-dynamic behavior of fluidized and spouting beds with different air temperatures and loads of flaxseeds (Linum usitatissimum L.), with estimates of the fluid-dynamic parameters correlated to each process. The parameters were compared with the values obtained from classical correlations in the literature, with indications of associated percentages of deviation. Influence of fluid dynamics on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Linum usitatissimum L.; Dynamic bed; Physiological quality; Germination; Fluid-dynamic parameters.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000207

Lolium multiflorum seed quality analyzed by accredited laboratories in the Rio Grande do Sul State
Provedor de dados: 65
Autores: Huth,Caroline; Lopes,Sidinei José; Müller,Caren Alessandra; Rosa,Cariane Pedroso da; Andrade,Fabrício Fuzzer de; Santos,Larissa Staggemeier dos; Mattioni,Nilson Matheus.
ABSTRACT: The objective of this research was to carry out a survey, through the levels of physical purity, percentage of pure seeds, number of other seeds, and the physiological quality through germination, in the samples of ryegrass seeds analyzed in laboratories accredited by the Ministry of Agriculture, Livestock and Supply in Rio Grande do Sul. Data from 3959 ryegrass samples analyzed from the period 2014 to 2017 were compiled. Quality of the seeds was presented through the percentage of samples within the standards recommended for commercialization, for the variables germination, pure seeds, seeds of cultivated species, wild, noxious, tolerated and noxiously forbidden, in all factors, cultivar, region of origin, category and crop of seed production....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ryegrass; Seed production; Germination; Purity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200203

Drift of 2,4-D and dicamba applied to soybean at vegetative and reproductive growth stage
Provedor de dados: 65
Autores: Silva,Diecson Ruy Orsolin da; Silva,Edson Dalla Nora da; Aguiar,Adalin Cezar Moraes de; Novello,Bruna Dal’Pizol; Silva,Álvaro André Alba da; Basso,Claudir José.
ABSTRACT: The introduction of dicamba and 2,4-D-resistant soybean will increase the use of auxin herbicides for management of herbicide-resistant weeds, increasing risk of drift in non-target crops. The field experiment was conducted in 2016/17 to evaluate injury, growth, yield, germination and seeds vigor of soybean effects to simulated drift of 2,4-D and dicamba applied to soybean at the V3 and R2 growth stages. To simulate drift, 2,4-D was applied at 0; 5.16; 10.4; 20.8 e 41.5g ae ha-1 and dicamba at: 0; 3.7; 7.4; 14.9 e 29.8g ae ha-1. The injury of the dicamba is greater than 2,4-D, and the V5 stage is more susceptible to both herbicides. The greatest reductions in soybean yield follow the drift of dicamba in R2 and 2,4-D in V5. The physiological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dose response; Injury; Germination; Vigor; Synthetic auxin.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000800151

Physical and physiological quality of seeds of Campo Grande Stylosanthes coated with different binder materials
Provedor de dados: 65
Autores: Baroni,Danilo Força; Vieira,Henrique Duarte; Silva,Flávio Wirlan Andrade da; Acha,Amanda Justino; Pires,José Inácio Coelho.
ABSTRACT: The binder materials used in seed coating provide adherence of the filler materials onto the seeds. Adequate concentrations of the binder promote good physical characteristics of coating while not impairing seed physiological characteristics. Thus, the objective of this study was to evaluate the type and the concentration of binder materials that allow the best physical and physiological characteristics in coated seeds of Campo Grande Stylosanthes. Seed coating was carried out in a coating pan, using sand as the filling material. The treatments consisted of 2 types of binders mixed in 3 ratios (PVA glue and gum arabic glue, diluted in water, 3:1, 2:1, and 1:1), and uncoated seeds as control. The coated seeds were evaluated for physical and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Coating; Stylosanthes capitata/macrocephala.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400201

Relationship between fruit maturation stage and physiological quality of physic nut (Jatropha curcas L.) seeds
Provedor de dados: 64
Autores: Silva,Laércio Junio da; Dias,Denise Cunha Fernandes dos Santos; Milagres,Carla do Carmo; Dias,Luiz Antônio dos Santos.
The physic nut (Jatropha curcas L.) has great potential for use in biodiesel production due to the high oil content of its seeds. Production of high quality seeds depends upon the appropriate time of harvest. A field experiment was carried out to monitor the maturation process of physic nut seeds and to establish the ideal harvest time of the seeds based on external fruit color. Fruits were collected at different maturation stages based on the external color: green, yellow-green, yellow, yellow-brown and brown. Seeds were extracted manually and, after natural drying, were submitted to the following tests and determinations: moisture content and dry matter, germination, first count seedling emergence, seedling growth, accelerated aging, electrical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Vigor; Harvest; Maturity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000100005

Physiological quality of osmoprimed eggplant seeds
Provedor de dados: 64
Autores: Reis,Rodrigo de Góes Esperon; Guimarães,Renato Mendes; Vieira,Antônio Rodrigues; Gonçalves,Nayara Roberto; Costa,Valéria Hanny.
Eggplant seeds germination can be slow and uneven, justifying the use of pre-germinative treatments to improve the performance of seed lots. One option of treatment is the controlled hydration of seeds by priming. In this way, this study aimed to evaluate the performance of eggplant seeds cv. Embu submitted to different methodologies of priming. The seeds used in the experiment were stored in cold chamber (15º C and 55% RH) in paper bags. The research was carried out at Central Laboratory of Seeds/UFLA. The seeds were submitted to the priming in aerated solutions varying the following factors: temperature (15º C and 25º C), time (24, 48 and 72 hours) and solution (water, PEG, KNO3 and PEG+KNO3). Seeds were washed in running water and dried at 30º C, until...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum melongena; Priming; Germination; Vigour.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000500005

Physiological quality, anatomy and histochemistry during the development of carrot seeds ( Daucus carota L.)
Provedor de dados: 64
Autores: Miranda,Rafaela Marques de; Dias,Denise Cunha Fernandes dos Santos; Picoli,Edgard Augusto de Toledo; Silva,Patrícia Pereira da; Nascimento,Warley Marcos.
ABSTRACT The adequate time for carrot seed harvest influences its physiological quality. The objective of this study was to evaluate physiological, anatomical and histochemical changes in carrot seeds harvested at different stages of development and to establish the most appropriate harvest time. Secondary umbels were harvested at 14, 21, 28, 35, 42, 49, 56 and 63 days after anthesis (DAA). For seed anatomical and histochemical characterization, sections were stained with Toluidine blue stain, Xylidine Ponceau, Lugol’s iodine, Sudan Black B and submitted to polarized light. Seed moisture content, seed dry matter, germination, first count, emergence percentage and emergence speed index of seedlings were evaluated. Cultivar Brasília carrot seeds at 14 DAA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maturity; Harvest; Reserve substances; Germination; Vigor.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200169

PHYSIOLOGICAL AND SANITARY QUALITIES OF MAIZE LANDRACE SEEDS STORED UNDER TWO CONDITIONS
Provedor de dados: 64
Autores: Stefanello,Raquel; Muniz,Marlove Fátima Brião; Nunes,Ubirajara Russi; Dutra,Cláudia Braga; Somavilla,Iana.
The preservation of seed quality during the storage period depends not only on the conditions during production and harvesting but also on the storage and maintenance of appropriate storage product conditions. Thus, the aim of this study was to evaluate the physiological and sanitary qualities of maize landrace seeds stored under two conditions. The maize seed batch varieties Oito carreiras, Cabo roxo and Lombo baio were used. Tests included germination, first count, cold test, accelerated aging and sanity. Based on the results it was concluded that the physiological quality of these seed varieties decreased with the storage period. The major fungi identified in the maize seeds during storage were from the genera Aspergillus, Fusarium and Penicillium,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Storage; Sanity; Germination.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400339