Consulta: subjectFacets:"Physiological quality"
Registros recuperados: 53
Data/hora: 08/06/2024 11:23:04

Indicadores de madurez fisiológica, calidad fisiológica y perfil químico en semilla de Jatropha curcas L.
Provedor de dados: 32
Autores: Zavala Hernández, José Trinidad.
Jatropha curcas L. ha adquirido gran importancia debido a su uso potencial en la elaboración de biodiesel; no obstante, no existe un paquete tecnológico para la producción de semilla. En este estudio se cuantificaron indicadores de madurez fisiológica, la calidad fisiológica y perfil químico durante el desarrollo de semilla de J. curcas. En una plantación de cuatro años de edad, se evaluaron dos periodos de fructificación y diferentes fechas de cosecha bajo un diseño de bloques completos al azar con tres repeticiones. Se marcaron flores femeninas en antesis para cosechar cada 7 días hasta que el exocarpo presentó dehiscencia. En fruto y semilla se midió el diámetro, longitud, peso fresco y relación diámetro/longitud. Además en semilla se cuantificó peso...
Palavras-chave: Jatropha curcas L.; Madurez fisiológica; Calidad fisiológica; Perfil químico; Physiological maturity; Physiological quality; Chemical profile; Producción de Semillas; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2301

Efficiency of the gravity table in the processing of coriander seeds
Provedor de dados: 75
Autores: Gadotti,Gizele Ingrid; Hornke,Nander F; Cavalcante,Jerffeson A; Silva,Joseano G da; Gonçalves,Vanessa P; Capilheira,André F.
ABSTRACT This study aimed at assessing the quality of the physiology and health of the coriander seeds processed in a gravity table. This was investigated at two settings namely, I with angle X 3.5° and angle Y 3.1° and II with 3.9° and 2.7° angles, with five gravity table discharges (high, high intermediate, intermediate, low intermediate and low) besides feeding. The experiment adopted the 2x6 factorial scheme, in a completely randomized design, with four replications. Two coriander seed batches of cultivar Verdão were used. The gravity table was adjusted to have 2.9 m s-1 air speed on the platform. The seed fractions discharged in the lower portion of the gravity table revealed poorer physiological performance than that of the others. Regulation I...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coriandrum sativum; Separation; Specific mass; Physiological quality.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000200211

Tratamentos pré-germinativos na germinação de sementes de maracujás silvestres.
Provedor de dados: 14
Autores: JOSE, S. C. B. R.; SALOMAO, A. N.; MELO, C. C. de; CORDEIRO, I. de M.; GIMENES, M. A.
The crops of passion fruit in Brazil are established predominantly by seedlings obtained from seeds that generally have low and irregular germination and dormancy, what are problems for passion fruit producers. The objective of this research was to study pre-germination treatments to potentiate the germination of wild passion fruit species seeds which could be used by the seed producers or farmers. Passiflora alata Curtis and Passiflora setacea D.C. fruits were harvested when they were visually ripe. After aryl removaled, the seeds remained in environmental laboratory for surface drying to water contents of 8.5% and 10%, respectively. The treatments performed on the seeds were: immersion in water at 45 °C for 20 minutes; immersion Promalin® growth...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Passiflora setacea; Qualidade fisiológica; Physiological quality; Dormência; Passiflora alata; Dormancy.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112254

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

Germination of guatambu seeds subjected to two light regimes
Provedor de dados: 190
Autores: Guollo, Karina; Possenti, Jean Carlo; Felippi, Marciele.
Guatambu (Aspidosperma parvifolium A. DC.) is a species that faces extinction in different regions of Brazil. The aim of this study was to evaluate the influence of photoperiod on germination of guatambu seeds at 25°C. The statistical procedure used was factorial design with two factors. Factor A was seed lots (Mother tree A, B, and C) and factor B was photoperiod (dark and 12 h of photoperiod). Guatambu seeds are not affected by photoperiod condition during the germination process.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological quality; Forest seeds; Aspidosperma parvifolium Recursos Florestais; Engenharia Florestal Qualidade fisiológica; Sementes florestais; Aspidosperma parvifolium.
Ano: 2015
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/758

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

Seed germination of Bowdichia virgilioides Kunth, under water stress
Provedor de dados: 91
Autores: Silva,Lígia M. de M.; Aguiar,Ivor B. de; Rodrigues,Teresinha de J.D.
Bowdichia virgilioides (Leguminosae-Papilionoideae) is a native tree species in Brazil characteristic of the savannah vegetation. Seeds of this species were submitted to different osmotic potentials induced by polyethyleneglycol (PEG-6000) in order to verify their resistance to drought conditions. Seeds were previously scarified with sulphuric acid and incubated at 25 ºC with an eight hours photoperiod, at osmotic potentials of 0.0, -0.1, -0.3, -0.5, -0.7, -0.9 and -1.1 MPa. It was found that water stress resistance limit ranged from -0.7 to -0.9 MPa. Significant reduction in germination velocity from -0.3 MPa, and final percentage of germination from -0.5 MPa in relation to control, were observed. Germination under drastic conditions of water stress was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest seed; Physiological quality; Osmotic potential; Polyethyleneglycol.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662001000100021

Storage of soybean seeds: Packaging and modified atmosphere technology
Provedor de dados: 91
Autores: Capilheira,André F.; Cavalcante,Jerffeson A.; Gadotti,Gizele I.; Bezerra,Bruna R.; Hornke,Nander F.; Villela,Francisco A.
ABSTRACT The characteristics of materials used in packages for seed storage may have a negative influence in the deterioration process, causing future problems during the period of storage and in emergence in the field. In this study, the objective was to evaluate the physiological quality of soybean seeds, stored in different packages with and without the addition of CO2 (modified atmosphere), for different periods of storage and in uncontrolled environmental conditions. In order to carry out the experiment, a completely randomized design was used in a split-plot scheme, with three types of packages (permeable, hermetic package inside the permeable package and hermetic package inside the permeable package with CO2 injection) in the main plot and six...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; Storage; Physiological quality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001100876

Storage of seeds of Cnidosculus phyllacanthus Pax &amp;amp; K. Hoffm.
Provedor de dados: 91
Autores: Silva,Lígia M. de M.; Aguiar,Ivor B. de; Morais,Déborah L. de; Viegas,Ricardo A.; Silveira,Joaquim A. G.
This work aimed to determine the best environment for conservation of physiological quality of seeds of Cnidosculus phyllacanthus during storage. Seeds with 8.5% moisture content and 86% germinative capacity were filled in containers of different permeability, and storaged at different conditions during 360 days. Seeds packed in permeable container (paper bag) were stored at ordinary room temperature (18 to 25 ºC and 55 to 78% RH), and dry chamber (18 ºC and 60% RH) while those packed in semipermeable (polyethylene bag) and impermeable (glass) containers were stored in cold chamber (10 ºC and 75% RH). Seed moisture content, germinative capacity and germination speed were evaluated each 90 days interval. For all the tested storage conditions, seed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Forestry seed; Physiological quality.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662005000400024

Ideal harvesting point of ‘Limeira-IAC382’ trifoliate orange fruits for seed extraction
Provedor de dados: 94
Autores: Conceição,Patrícia Marluci da; Azevedo,Fernando Alves de; Souza,Ana Julia Borim de; Próspero,Alexandre Gonçalves; Morelli,Marília; Forti,Victor Augusto.
Abstract  Trifoliate orange is one of the rootstocks most used worldwide mainly because it provides excellent quality fruit production. Harvest at the correct time is among factors that determine the physiological quality of seeds. The aim of this study was to identify physicochemical changes in ‘Limeira-IAC382’ trifoliate orange fruits, searching for the ideal harvest moment to obtain high quality seeds. Fruits were harvested at 180, 210 and 240 days after anthesis, stored in cold chamber and evaluated at 0, 15, 30 and 45 days of storage. The following variables were determined: mass loss, fruit color index, soluble solids, total titratable acidity and fruit juice ratio. Seeds were manually extracted and dried until reaching 30% water content. Seeds were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poncirus trifoliata (L.) Raf.; Rootstock; Physiological quality; Maturation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000100202

Eletrical conductivity and deterioration of soybean seeds exposed to different storage conditions
Provedor de dados: 95
Autores: Panobianco,Maristela; Vieira,Roberval Daiton.
Research with soybean seeds has revealed that the results of the electrical conductivity test may be influenced by storage temperature, particularly low temperature, such as 10ºC, suggesting that seed deterioration at low storage temperatures does not seem to be directly related to the loss of the cell membrane integrity. This study was conducted with seeds of two soybean cultivars with the objective of: a) studying the effect of different storage temperatures (10ºC; 20ºC; 25ºC; 20/10ºC and 25/10ºC) on the results of the electrical conductivity test; b) observing the behavior of fatty acids and carbohydrates during storage and studying its relation with the electrical conductivity results. Every three months, from a total of 18 months of storage, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Vigor; Physiological quality.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222007000200013

Performance of lowland rice seeds coated with dolomitic limestone and aluminum silicate
Provedor de dados: 95
Autores: Tavares,Lizandro Ciciliano; Rufino,Cassyo de Araújo; Dörr,Caio Sippel; Barros,Antônio Carlos Souza Albuquerque; Peske,Silmar Teichert.
The objective of this study was to evaluate the performance of seeds of two cultivars of lowland rice (Oryza sativa L.), coated with dolomitic limestone and aluminum silicate. It was used a completely randomized experimental design, with the treatments arranged in a 4 X 2 factorial scheme [4 treatments: dolomitic limestone; dolomitic limestone + aluminum silicate; aluminum silicate, at the dosages of 50 g/100 kg of seeds; and control (without the products) X 2 cultivars: IRGA424 and IRGA 422 CL], totaling eight treatments with four replications each. The variables analyzed were: fresh and dry weights of aerial biomass; plant height; leaf area at 10, 20, and 30 days after emergence (DAE). The physiological quality of seeds was also assessed using tests of:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Seed coating; Physiological quality.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000200003

Respiratory activity for the differentiation of vigor on soybean seeds lots
Provedor de dados: 95
Autores: Mendes,Cristina Rodrigues; Moraes,Dario Munt de; Lima,Maria da Graça de Souza; Lopes,Nei Fernandes.
Currently, the highest interest with respect to the assessment of seed physiological quality is to obtain reliable results in a relatively short period of time. This initiative allows for prompt decisions during different phases of seed production primarily after physiological maturity. This research was performed to verify the efficiency and rapidity of the method of Pettenkofer to determine the respiratory activity and to differentiate vigor levels of soybean seed lots. Three lots of soybean seeds cv. 8000 were used. Seed performance was determined by respiratory activity, compared to the following tests: standard germination, germination first count, electrical conductivity, seedling emergence, seedling shoot and root length and total dry mass. Results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological quality; Respiration; Seed analysis.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222009000200020

Physiological and enzymatic alterations in papaya seed during storage
Provedor de dados: 95
Autores: Dias,Denise Cunha Fernandes Dos Santos; Estanislau,Wagner Tompson; Finger,Fernando Luiz; Alvarenga,Eveline Mantovani; Dias,Luiz Antônio Dos Santos.
This study was done to evaluate the physiological and enzymatic alterations in papaya (Carica papaya L.) seeds during storage period. Seeds were extracted from mature fruits of Formosa group papaya hybrid Tainung 01. The sarcotesta was removed by rubbing the seeds on a wire screen under running water and then dried to the moisture content (MC) of 5, 8 or 11% The seeds were packed in multilayer paper bags, polyethylene bags, aluminum foil pouch and metallic canisters and stored for 15 months under laboratory conditions. Seeds were evaluated, at three month interval, for MC, germination, and the activity of acid phosphotase (AP) and malate dehyrogenase (MDH) was evaluated with the use of amide gel (12%) electrophoresis. The fresh seeds had post-harvest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Preservation; Package; Physiological quality; Carica papaya L.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000100017

Crambe fruit drying with natural air in stationary dryers
Provedor de dados: 124
Autores: Cardoso Neto,Sebastião Rodrigues; Resende,Osvaldo; Costa,Lilian Moreira; Oliveira,Daniel Emanuel Cabral de.
ABSTRACT The aim of this study was to assess the drying behavior and quality of crambe fruit seeds dried with natural air and submitted to different airflows in stationary dryers. Dryings were carried out in July and September 2014. The experiment consisted of three treatments of drying the crambe fruits with natural air in stationary dryers with airflows of 10.08, 15.05, and 25.03 m3 min−1 t−1 and a control treatment composed of crambe fruits with an initial moisture content without going through the drying process. After drying, tests of moisture content, germination, germination rate index, and electrical conductivity were performed in order to compare the treatments. The data were submitted to analysis of variance and mean comparison by the Tukey's...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Moisture content; Physiological quality; Biodiesel.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400592

Essential oils in the control of Colletotrichum gloeosporioides f. Sp. cepae in onion seeds
Provedor de dados: 124
Autores: Lozada,Maria Isabel Ordonez; Silva,Patricia Pereira da; Pereira,Ricardo Borges; Nascimento,Warley Marcos.
ABSTRACT Anthracnose, one of the major diseases in the onion, is caused by the fungus Colletotrichum gloeosporioides f. sp. cepae. The main strategy for controlling this fungus is by the use of fungicide, with this technique being used on the majority of crops. Currently, methods of disease control are being studied that are less aggressive to the environment, with the use of essential oils proving to be an alternative. As such, the aim of this study was to evaluate the direct effect of the essential oils of basil (Ocimum basilicum), lemongrass (Cymbopogon citratus (DC) Stapf.), sage (Salvia officinalis), thyme (Thymus vulgaris) and citronella (Cymbopogon winterianus) as an alternative in the control of the fungus C. gloeosporioides f. sp. cepae, in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa; Physiological quality; Conidial germination; Mycelial growth.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300510

Classification of West Indian gherkin seeds vigor by respiratory activity
Provedor de dados: 124
Autores: Leite,Moadir de Sousa; Leite,Tiago de Sousa; Torres,Salvador Barros; Leal,Caio César Pereira; Freitas,Rômulo Magno Oliveira de.
ABSTRACT Seed companies increasingly need to obtain rapid and reliable results on seed quality. In this context, this study aimed at verifying the efficiency of CO2 measurement for classifying West Indian gherkin (Cucumis anguria L.) seed vigor, using three seed lots of cv. “Do Norte” and three of cv. “Nordestino”. In order to assess seed physiological quality, the following tests were performed: germination, seedling emergence, emergence speed index, shoot length, total dry matter, electrical conductivity and respiratory activity. The experimental design was completely randomized, with four replicates, and the means were compared by Tukey test at 5% probability level. Pearson’s simple correlation was performed between the traditional vigor tests and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis anguria L.; CO2 measurement; Physiological quality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200307

Variations in desiccation tolerance in seeds of Eugenia pyriformis: dispersal at different stages of maturation
Provedor de dados: 124
Autores: Lamarca,Edmir Vicente; Camargo,Marcelo Bento Paes de; Teixeira,Simone de Padua; Silva,Edvaldo Aparecido Amaral da; Faria,Jose Marcio Rocha; Barbedo,Claudio Jose.
ABSTRACT Eugenia pyriformis Cambess., known locally as uvaieira, a species of fruit-bearing tree with both pharmacological and gastronomic potential, has seeds which are sensitive to desiccation. The aim of this study was to analyse whether the degree of tolerance to desiccation of uvaieira seeds depends on the stage of maturation of the seeds at shedding. This, in turn, depends on the environmental conditions in which the seeds develop, including the accumulation of degree-days and rainfall in the period. Seeds were collected from the ripe fruit of parent plants located in the states of São Paulo and Minas Gerais, Brazil, submitted to drying and analysed for water content and germination. A completely randomised design was used in a 20 x 3 factorial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myrtaceae; Uvaieira; Degree days; Physiological quality; Drying.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100118

Biochemical and physiological analysis in carrot seeds from different orders of umbels
Provedor de dados: 124
Autores: Silva,Patrícia Pereira da; Sekita,Marcelo Coelho; Dias,Denise Cunha Fernandes dos Santos; Nascimento,Warley Marcos.
ABSTRACT In carrot seed production, harvesting of the umbels is generally staggered, or sometimes the whole plant is harvested with the umbels at different stages of maturation; in that case, there is a risk of harvesting immature seeds and of losses due to natural dehiscent, or to physiological deterioration as a result of unfavourable environmental factors. The present study aimed to evaluate the physiological and biochemical changes related to the maturation of 'Planalto' carrot seeds from diferent umbels. The samples were collected 120 days after anthesis, with the primary, secondary and tertiary umbels being harvested separately. Seeds were analysed for germination, first count and germination rate, at temperatures of 25 ºC (optimum) to 35 ºC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Daucus carota L.; Physiological quality; Enzyme activity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200407

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 maturity of Luffa cylindrica (L.) Roem. Seeds
Provedor de dados: 124
Autores: Medeiros,Marcelo Gurgel; Silva Neto,José Sisenando de Sênna; Oliveira,Giordanio Bruno Silva; Torres,Salvador Barros; Silveira,Lindomar Maria da.
ABSTRACT Maturation of seeds involves a systematic sequence of physical and physiological alterations observed from fecundation until they become independent of the mother plant. These alterations comprehend a set of steps which prepare them for a successful germination in the future, characterized by the synthesis and accumulation of reserves. Thus, the objective was to evaluate the development and physiological quality of seeds of L. cylindrica accessions during maturation. Fruits of L. cylindrica accessions were harvested from the 10th day after anthesis (DAA) until the 50th DAA, at 10-day intervals. In each harvest, fruit fresh weight was determined, and then the seeds were manually extracted and subjected to the following evaluations: 100-seed weight,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbitaceae; Loofah; Plant genetic resources; Physiological quality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100076

Development of methodology to test the electrical conductivity of Marandú grass seeds
Provedor de dados: 124
Autores: Melo,Paulo Alexandre Fernandes Rodrigues de; Martins,Cibele Chalita; Alves,Edna Ursulino; Vieira,Roberval Daiton.
ABSTRACT The electrical conductivity test enables the evaluation of seed vigor for a maximum period of 24 hours, but the need to count the seeds to obtain a sample for analysis makes it difficult to apply this test to small seeds, such as forage grasses. The objective of this study was to establish a practical methodology for testing the electrical conductivity of Brachiaria brizantha (Hochst. Ex A. Rich.) Stapf ‘Marandú’ seeds and to estimate its effect on seedling emergence in the field. The water content, germination, first germination count, first emergency count, percentage, and rate of seedling emergence speed in the laboratory, seedling emergence in the field, and electrical conductivity of eight batches of seeds was analyzed. In the last test, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Forage grasses; Physiological quality; Vigor tests.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100107

Multivariate analysis and vigor tests to determine the quality of Brachiaria decumbens seeds
Provedor de dados: 124
Autores: Silva,Givanildo Zildo da; Martins,Cibele Chalita; Bruno,Riselane de Lucena Alcântara; Pereira,Francisco Elder Carlos Bezerra; Jeromini,Tatiane Sanches.
ABSTRACT This study aimed to verify the efficiency of multivariate analysis in the identification of promising vigor tests for the evaluation of the physiological quality of seed lots of Brachiaria decumbens cv. Basilisk. Seeds of B. decumbens cv. Basilisk were tested for the following parameters: water content, germination, first germination count, cold test, electrical conductivity, seedling growth, seedling dry mass, first count and emergence percentage of seedlings in laboratory substrate, and seedling emergence in the field. The data obtained in each test-all completely randomized experimental designs-were analyzed separately by means of analysis of variance, Scott-Knott’s test, and multivariate analysis. Principal component analysis is efficient to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological quality; Control quality; Principal component analysis; Grass forage; Seedling emergence in field.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200291

Electrical conductivity as an indicator of pea seed aging of stored at different temperatures
Provedor de dados: 63
Autores: Panobianco,Maristela; Vieira,Roberval Daiton; Perecin,Dilermando.
Research on soybean seed has revealed that conductivity test results may be influenced by storage temperature and that an apparent direct relationship between deterioration at low temperatures and loss of cellular membrane integrity is not evident. The objective of this study was to verify the influence of low storage temperatures on electrical conductivity results in other species, such as seeds of two pea cultivars studied temperatures were: 10, 20, 25, 20/10 and 25/10ºC. The physiological potential of the seeds was evaluated every three months during an 18 month storage period using germination, accelerated aging and electrical conductivity tests. The electrical conductivity test was not a good indicator for the degree of seed deterioration stored at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pisum sativum L.; Vigor; Physiological quality.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000200003

Electrical conductivity of the seed soaking solution and soybean seedling emergence
Provedor de dados: 63
Autores: Vieira,Roberval Daiton; Scappa Neto,Angelo; Bittencourt,Sonia Regina Mudrovitsch de; Panobianco,Maristela.
Vigor of soybean [Glycine max (L.) Merrill] seeds can be evaluated by measuring the electrical conductivity (EC) of the seed soaking solution, which has shown a satisfactory relationship with field seedling emergence, but has not had aproper definition of range yet. This work studies the relationship between EC and soybean seedling emergence both in the field and laboratory conditions, using twenty two seed lots. Seed water content, standard germination and vigor (EC, accelerated aging and cold tests) were evaluated under laboratory conditions using -0.03; -0.20; -0.40 and -0.60 MPa matric potentials, and field seedling emergence was also observed. There was direct relationship between EC and field seedling emergence (FE). Under laboratory conditions, a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Vigor; Physiological quality; Water stress.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200007

Sensitivity of seed to desiccation in cupuassu (Theobroma grandiflorum (Willd. ex Spreng.) K. Schum. - sterculiaceae
Provedor de dados: 63
Autores: Cruz,Eniel David; Cicero,Silvio Moure.
The response of seeds to reduction in moisture content will determine whether they can be stored by conventional methods. The objective of this study was to verify the effect of desiccation on the germination and vigor of cupuassu (Theobroma grandiflorum (Willd. ex Spreng.) K. Schum.) seeds, a tropical fruit species. The following seed moisture contents (SMC) were tested: 57.1%, 53.7%, 49.8%, 46.5%, 41.4%, 35.4%, 28.3%, 23.2%, 17.4%, 15.5% and 14.6%. Desiccation of seeds to as low as 41.4% (SMC) did not affect emergence, germination or vigor. However, reductions in speed of emergence were observed below 41.4%. When SMC was equal or lower than 35.4% a reduction in seed quality was observed. Loss of seed quality was increased when moisture content was equal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deterioration; Dehydration; Drying; Physiological quality.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000500017

Carrot seed germination and vigor in response to temperature and umbel orders
Provedor de dados: 63
Autores: Pereira,Roseane Sousa; Nascimento,Warley Marcos; Vieira,Jairo Vidal.
Several factors may influence carrot (Daucus carota L.) crop establishment. High temperatures (35 - 40°C), for instance, may delay or inhibit carrot seed germination in the field and so compromise the stand establishment. Carrot seeds from superior umbel orders usually have better physiological quality than those of lower umbel orders. These seeds from superior umbel orders may also show a better performance in adverse conditions. In addition, seeds from different ages show differences in vigor, which affect the stand establishment, mainly under adverse conditions. The aim of this study was to verify the germination at high temperatures and the carrot seed vigor of different umbel orders of 'Brasília', as well as the different 'Alvorada' seed lots....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Daucus carota L.; Thermo-inhibition; Physiological quality.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000200006

Weathering deterioration in pre-harvest of soybean seeds: physiological, physical, and morpho-anatomical changes
Provedor de dados: 63
Autores: Pinheiro,Daniel Teixeira; Dias,Denise Cunha Fernandes dos Santos; Medeiros,André Dantas de; Ribeiro,João Paulo Oliveira; Silva,Felipe Lopes da; Silva,Laércio Junio da.
ABSTRACT: Successive cycles of water absorption and loss favor weathering deterioration, one of the main factors that affect the quality of soybean seeds. This study evaluated the physiological, physical, and morpho-anatomical changes in soybean seeds under weathering deterioration at the pre-harvest phase. Six soybean cultivars (BMX Apolo, DM 6563, NS 5959, NA 5909, BMX Potência, and TMG 1175) were produced in a greenhouse and underwent weathering deterioration through a rainfall simulation system, applying 0, 60, 120, and 180 mm of precipitation at pre-harvest phase. Each rainfall level was divided into two applications at an interval of 72 h: 60 mm (30 + 30), 120 mm (60 + 60), and 180 mm (90 + 90). After harvest, the seeds were evaluated for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; X-ray; Anatomy; Precipitation; Physiological quality.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000700602

Germination and vigour of primed asparagus seeds
Provedor de dados: 63
Autores: Bittencourt,Mário Lúcio de Carvalho; Dias,Denise Cunha Fernandes dos Santos; Dias,Luiz Antônio dos Santos; Araújo,Eduardo Fontes.
The osmotic conditioning or priming is considered a promising technique to speed up germination and to improve seed performance. Four seed lots of asparagus, Mary Washington cultivar, were primed at 25°C for seven or 14 days using PEG 6000 at -1.0 or -1.2 MPa, or sea water at -3.3 MPa; or for three days in distilled water. The physiological quality of the seeds was evaluated by standard germination, first count germination, speed of seedling emergence, and germination percentage and seedling fresh and dry weights after controlled deterioration test. Primed seeds presented higher germination speed, independently of their initial physiological quality. Beneficial effects of priming on germination and vigour were more expressive in the seed lot of low...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Osmotic conditioning; Physiological quality.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000400003

Accelerated aging of melon seeds
Provedor de dados: 63
Autores: Torres,Salvador Barros; Marcos Filho,Julio.
Accelerated aging is one of the most useful tests used for the evaluation of seed vigor but it is seldomly used to test melon (Cucumis melo L.) seeds. The objective this research was to compare different procedures of the accelerated aging test to evaluate the physiological quality of melon seeds and the efficiency of using saturated salt solution for the control of water uptake by seeds. Five seed lots each of the hybrids AF-646 and AF-682 were tested for germination, seedling emergence, traditional accelerated aging (periods 0f 48, 72 and 96 hours, at 38 or 41°C) and salt saturated accelerated aging. The accelerated aging test (traditional procedure and with salt solution) for 72h and 96h, at 38 or 41°C was sensitive to detect differences in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo; Physiological quality; Vigor.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100012

Image analysis for the evaluation of soybean seeds vigor
Provedor de dados: 109
Autores: Barros Brandan,Erich; Oliveira Silva Souza,Nara; Mattioni,Nilson Matheus; Fernandes de Jesus Souza,Flívia; Michelle Souza Vilela,Flívia; Marques,Érica Alves; de Souza-Ferreira,Wallas Felippe.
Abstract The search for time and human subjectivity reduction in the analysis of the physiologic potential of seeds has brought forward the use of computerized systems as an alternative. The goal of this research was to assess the effectiveness of the GroundEye equipment in the characterization of soybean seeds vigor by using the image analysis technique in comparison to the information provided by vigor tests recommended to soybean seeds. Sixteen lots of two soybean varieties were used - variety 98Y12 and P98Y70, characterized by the following tests: germination test, accelerated ageing test, cold test, tetrazolium test, and seedling emergence in the field. The image analysis was performed using the GroundEye software to obtain the vigor index and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; Physiological quality; GroundEye software.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000300311

Isoenzyme activity in monitoring deterioration of Balfourodendron riedelianum seeds
Provedor de dados: 1
Autores: Schneider, Cristina Fernanda; Gusatto, Fabiane Cristina; Dranski, João Alexandre Lopes; Malavasi, Marlene de Matos; Malavasi, Ubirajara Contro.
  In this study, we sought to identify efficient enzymes for use in monitoring the deterioration and loss of germination of Balfourodendron riedelianum (Engler) Engler seeds. The research was conducted at the Laboratório de Tecnologia de Sementes e Mudas of the Universidade Estadual do Oeste do Paraná, Campus Marechal Cândido Rondon, Paraná State, Brazil. Seeds were harvested at three collection sites and later submitted for processing, drying, initial characterization and storage in airtight packaging under controlled and uncontrolled storage conditions and uncontrolled. Tests were conducted at 0, 120, 240, and 360 days using a germination test, germination speed index, accelerated ageing test and the activity of peroxidase, phenylalanine ammonia-lyase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.02.01.04-2 ivory wood; Ageing; Physiological quality; Enzymatic activity. Sementes Florestais.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39347

Isoenzyme activity in monitoring deterioration of Balfourodendron riedelianum seeds
Provedor de dados: 1
Autores: Schneider, Cristina Fernanda; Gusatto, Fabiane Cristina; Dranski, João Alexandre Lopes; Malavasi, Marlene de Matos; Malavasi, Ubirajara Contro.
  In this study, we sought to identify efficient enzymes for use in monitoring the deterioration and loss of germination of Balfourodendron riedelianum (Engler) Engler seeds. The research was conducted at the Laboratório de Tecnologia de Sementes e Mudas of the Universidade Estadual do Oeste do Paraná, Campus Marechal Cândido Rondon, Paraná State, Brazil. Seeds were harvested at three collection sites and later submitted for processing, drying, initial characterization and storage in airtight packaging under controlled and uncontrolled storage conditions and uncontrolled. Tests were conducted at 0, 120, 240, and 360 days using a germination test, germination speed index, accelerated ageing test and the activity of peroxidase, phenylalanine ammonia-lyase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ivory wood; Ageing; Physiological quality; Enzymatic activity.; Sementes Florestais.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39347

Chronological analysis of the physiological quality of diaspores of Myracrodruon urundeuva Fr. All. in semiarid regions
Provedor de dados: 1
Autores: Azevedo, Aderdilania Iane Barbosa de; Silva, Givanildo Zildo da; Bruno, Riselane de Lucena Alcântara; Andrade, Alberício Pereira de; Cruz, José de Oliveira.
 The objective of this study was to evaluate the physiological quality of diaspores from Myracrodruon urundeuva mother trees developing in the Cariri region of the state of Paraíba, Brazil. The seeds were collected during three consecutive years and from different areas of the Cariri region. The seed collection areas comprised two sites in the municipality of Boa Vista and one in the municipality of São João do Cariri. The diaspores had their water content determined and were submitted to the following tests: germination, seedling emergence, first count of germination and seedling emergence (within 5 days), and speed of germination and seedling emergence. The treatment means were compared using the deviance statistic. The collection years and collection...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Produção e beneficiamento de sementes 5.01.00.00-9; 5.01.03.00-8 aroeira; Physiological quality; Seeds; Caatinga. Produção e beneficiamento de sementes.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39423

Mineral supplementation of soybean seeds with different initial nutrient levels
Provedor de dados: 1
Autores: Conceição, Gerusa Massuquini; Cunha, Vinícius dos Santos; Fipke, Glauber Monçon; Bruning, Lucas Allan; Rossato, Anderson da Costa; Martin, Thomas Newton.
The objectives of this study were to evaluate the effect of the chemical composition of soybean seeds and the efficiency of seed mineral supplementation on physiological quality and field performance. Two seed lots (high and low levels of mineral nutrition), with or without supplemental macro- and micronutrients, of three soybean cultivars (BMX Potência RR, BMX Turbo RR, and BMX Magna RR) were used. For the laboratory experiment, a completely randomized design with four replications was used. To evaluate the physiological quality of the seeds, the water content, first count, germination, 1,000-seed weight, and length and dry weight of the seedling were determined. For the field experiment, a randomized block design with four replications was used, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max (L.) Merrill; Seed physiology; Physiological quality; Chemical composition. Glycine max (L.) Merrill; Seed physiology; Physiological quality; Chemical composition.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42484

Chronological analysis of the physiological quality of diaspores of Myracrodruon urundeuva Fr. All. in semiarid regions
Provedor de dados: 1
Autores: Azevedo, Aderdilania Iane Barbosa de; Silva, Givanildo Zildo da; Bruno, Riselane de Lucena Alcântara; Andrade, Alberício Pereira de; Cruz, José de Oliveira.
 The objective of this study was to evaluate the physiological quality of diaspores from Myracrodruon urundeuva mother trees developing in the Cariri region of the state of Paraíba, Brazil. The seeds were collected during three consecutive years and from different areas of the Cariri region. The seed collection areas comprised two sites in the municipality of Boa Vista and one in the municipality of São João do Cariri. The diaspores had their water content determined and were submitted to the following tests: germination, seedling emergence, first count of germination and seedling emergence (within 5 days), and speed of germination and seedling emergence. The treatment means were compared using the deviance statistic. The collection years and collection...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aroeira; Physiological quality; Seeds; Caatinga.; Produção e beneficiamento de sementes; Produção e beneficiamento de sementes.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39423

Presença e qualidade de sementes esverdeadas de soja na região sul do Estado do Mato Grosso do Sul - doi: 10.4025/actasciagron.v33i1.4852
Provedor de dados: 1
Autores: Rangel, Marco Antônio Sedrez; Embrapa Mandioca e Fruticultura Tropical; Minuzzi, Andréia; União do Ensino Superior de Nova Mutum; Pierezan, Luciane; Embrapa Agropecuária Oeste,; Teodósio, Tiara Kesli Conticelli; Universidade Federal da Grande Dourados; Ono, Fábio Benedito; Universidade Federal de Lavras; Cardoso, Paulo César; Universidade Federal da Grande Dourados.
Sementes de soja produzidas em algumas regiões do Estado de Mato Grosso do Sul têm apresentado sérios problemas de qualidade pela ocorrência de elevados percentuais de sementes esverdeadas. Objetivando averiguar o problema, foi conduzido um experimento em que foram avaliados potencial de germinação, comprimento de raiz, teor de óleo e porcentagem de acidez do ácido oleico das sementes de soja das cultivares BRS 133, BRS 181, BRS 206, BRS 239, BRS 240, BRS 241, CD 202 e Embrapa 48, produzidas em seis locais do Estado (Dourados – Barreirão, Dourados – CPAO, Maracaju, Naviraí, Ponta Porã e Sidrolândia). O delineamento experimental de campo foi em blocos ao acaso com três repetições, em cada local. Os genótipos de Ponta Porã e Barreirão, cujos lotes continham...
Palavras-chave: 5.01.03.00-8 Glycine Max; Cultivares; Qualidade fisiológica 5.01.03.03-2 Glycine max; Cultivars; Physiological quality.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4852

Soybean seed vigor: ethanol quantification test
Provedor de dados: 111
Autores: da Silva, Raimunda Nonata Oliveira; Cavalcante, Jerffeson Araujo; Gadotti, Gizele Ingrid; Martins, Andrea Bicca Noguez; Teixeira, Sheila Bigolin; Vergara, Rafael Oliveira; de Tunes, Lilian Vanussa Madruga.
The objective of this study was to verify the separation of soybean seed lots according tovigor levels by the rapid ethanol test follow ing the adapted ethylometer method. The design used was entirely randomized, with four repetitions. The treatments consisted of five soybean seed lots, which were submitted to germination tests, first germination count, accelerated aging, field emergence, and electrical conductivity and ethanol measurement test. To measure ethanol, 50 soybean seeds were placed in plastic bottles containing 50 mL of distilled water, then placed in a BOD incubator for different temperatures and exposure times. After the imbibition period, measurements were performed with the aid of an adapted ethylometer. It is possible to quantify ethanol...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; Physiological quality; Deterioration; Alcohol.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6453

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

The influence of seed coating on the vigor and early seedling growth of barley
Provedor de dados: 118
Autores: Corlett,Francisco M.F; Rufino,Cassyo de A; Vieira,Jucilayne F; Tavares,Lizandro C; Tunes,Lilian V.M; Barros,Antonio C.S.A.
Seed coating is a process in which a thin and uniform polymer layer is deposited on the surface of a seed. The objective of this study was to evaluate the vigor of barley seed coated with a commercial polymer and various combinations of calcium, silicon and fungicide. In addition to a control with only the polymer coating, a total of 17 seed coating treatments were used in a completely randomized factorial design (18 treatments × 4 replicates per treatment). Calcium and silicon were applied at concentrations of 0, 25 or 50 g kg¹ of seed, and 0 or 3.0 mL of fungicide was applied. The means were compared using a Duncan test (P&amp;#8804;0.05). The results showed that a coating of polymer, fungicide, calcium and silicon did not affect the physiological...
Tipo: Journal article
Palavras-chave: Seed protection; Physiological quality; Seed quality.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100013

QUALIDADE DE SEMENTES DE GIRASSOL
Provedor de dados: 65
Autores: Menezes,Nilson Lemos de; Marchezan,Enio.
O presente trabalho teve como objetivos avaliar a qualidade fisiológica e sanitária de sementes de girassol (Helianthus annuus L.), provenientes do Ensaio Regional de Cultivares de Girassol, instalado na área experimental da Universidade Federal de Santa Maria (UFSM), em Santa Maria - RS, nas safras 1984/85 e 1985/86. Foram testados 15 genótipos e duas épocas de colheitas; a primeira quando as sementes atingiram, pela primeira vez, 14 - 13% de umidade e a segunda oito dias após. A qualidade fisiológica das sementes foi avaliada através dos testes de germinação e vigor (envelhecimento acelerado, strictu sensu), peso de mil sementes e conteúdo de matéria seca. O estudo patológico foi feito pelo método de papel de filtro, com congelamento, assepsia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sunflower seeds; Physiological quality; Sanitary quality; Harvest delaying.
Ano: 1991
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781991000300003

Priming of Stylosanthes seeds
Provedor de dados: 65
Autores: Alencar,Karina Margareti de Castilio; Rodrigues,Adriana Paula D'Agostini Contreiras; Pereira,Silvia Rahe; Laura,Valdemir Antônio.
It is estimated that 60% of the area of cultivated pasture, in the Brazilian Savannah, is degraded or in process of degradation, due to, among other causes, the lack of nitrogen. The Stylosanthes genus is the legume which has the greater number of cultivars used in tropical pastures, however, its seeds have characteristics which can difficult the formation of an adequate stand of plants on pasture. In this research the aim was to evaluate the effects of priming in the speed and uniformity of the Stylosanthes capitata, S. macrocephala and S. guianensis seeds germination. The seeds were kept for 12, 24, 36 and 48 hours in aired media PEG 6,000 at 0.0, -0.5, -1.0 and -1.5MPa. Afterwards, they were sent to the germination test. The variables analyzed were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage; Physiological quality; Legume; Priming.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000400008

Rice Seed Production Under Conditions of Salinity Stres
Provedor de dados: 65
Autores: Harter,Fabio Schaun; Harter,Leticia dos Santos Holbig; Meneghello,Geri Eduardo.
ABSTRACT:  In the present study, the objective was to evaluate the production and quality of rice seeds of four cultivars under conditions of saline stress caused by irrigation water. The work was carried out at the EliseuMaciel Agronomy College of the Universidade Federal de Pelotas, with four rice cultivars, IRGA 417, Avaxi CL, Inov CL and IAS 12-9 (Formosa). In the experiment, the following saline concentrations were used: 0; 12.5; 25; 37.5; 50; 75 and 100mM. After completing the crop cycle, the following agronomic characteristics were evaluated in each of the plants: number of panicles, total weight of panicles, percentage of full seeds, percentage of seedlings and weight of a thousand seeds. The physiological quality of the seeds harvested from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa L.; Saline stress; Physiological quality; Agronomic characteristic.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900250

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

Seed size affects productive parameters in Sudan grass
Provedor de dados: 65
Autores: Bernardi,Alexandre; Ramos,Alexandre Rogério; Silva,Antonio Waldimir Leopoldino da.
ABSTRACT:  The use of larger seeds may improve the initial development, plant stand, and mass productivity in forage crops. The present study aimed to evaluate the effect of the size of seeds of Sudan grass (Sorghum sudanense L.), standardized on density, on parameters of physiological quality and crop productivity. Seeds were processed in a gravitational table in order to become uniform in terms of density and then submitted to sieves with apertures of 1.75 or 2.00 mm. Three different treatments (seeds without size classification, seeds with diameter between 1.75 mm and 1.99 mm, and seeds with diameter above 2.00 mm) were compared. This study consisted of a laboratory stage for the analysis of physiological variables of seed, and a stage in field plots...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sieves; Seed processing; Forage yield; Physiological quality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400653

Antioxidant activity and physiological performance of popcorn seed after saline stress and analysis of seedling images
Provedor de dados: 64
Autores: Catão,Hugo Cesar Rodrigues Moreira; Caixeta,Franciele; Lopes,Amanda Moreira; Nery-Silva,Flavia Andrea; Sá Júnior,Adílio de.
ABSTRACT Salinity influences all germination stages and may adversely affect seedling establishment in the field. The objective of this research was to determine the relationship between the antioxidant activity and the physiological performance of seeds and to verify the efficacy of the imaging analysis of popcorn seedlings after seed exposure to saline stress. A completely randomized design was used that consisted of four replicates in a factorial scheme. This scheme comprised three popcorn hybrids (P618, AP6002, and AP8203) and five saline potential levels (0.0; -0.1; -0.3; -0.6, and -0.9 MPa) that were obtained from KCl solutions of different concentrations. First count germination, germination and seedling vigor classification (strong normal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays var. everta; Physiological quality; Seed vigor; Image processing; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100230

ACCELERATED AGING AND ELECTRICAL CONDUCTIVITY TESTS IN CRAMBE SEEDS
Provedor de dados: 64
Autores: Lima,Juliana Joice Pereira; Freitas,Marcella Nunes de; Guimarães,Renato Mendes; Vieira,Antônio Rodrigues; Ávila,Maria Alice Bento.
The aim of this study was to adapt the methodology of the accelerated aging and electrical conductivity tests for determination of physiological potential in crambe seeds. Six seed lots of crambe (cv. FMS Brilhante) were subjected to determination of moisture content, germination test, first count germination, emergence, and emergence speed index. For the accelerated aging test, the traditional methodology was used with water, and with a saturated potassium chloride and sodium chloride solution in three periods of exposure (24, 48, and 72 hours) at 41°C; the electrical conductivity test was performed with four pre-soaking treatments (0, 2, 4, and 8 hours) and four soaking periods (4, 8, 16, and 24 hours) at 25°C. The accelerated aging test with water for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crambe abyssinica; Vigor; Physiological quality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000100007

Cryopreservation in Coffea canephora Pierre seeds: Slow and fast cooling
Provedor de dados: 64
Autores: Coelho,Stefânia Vilas Boas; Rosa,Sttela Dellyzete Veiga Franco da; Fantazzini,Tatiana Botelho; Baute,Júlia Lima; Silva,Luciano Coutinho.
ABSTRACT Coffee is one of the main agricultural commodities in the country, and it is important to conservation of plant material for breeding programs. Cryopreservation is a promising alternative for preserving in the long-term the germplasm of species considered recalcitrant. However, studies should be performed to achieve maximum survival of seedlings after immersion in liquid nitrogen. The objective of this work was to find a cryopreservation protocol for storing seeds of Coffea canephora, studying two methods of cryopreservation, slow and fast cooling. Seeds were subjected to drying in silica gel up to the water content of 0.25 g g-1. In the first experiment, dried seeds were subjected to treatments of slow cooling at speeds of -1 ºC min-1,-3 ºC min-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drying in silica gel; Recalcitrant seeds; Ice crystals; Isoenzymes; Physiological quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000600588

Improved assessment of wheat seeds vigor
Provedor de dados: 64
Autores: Carvalho,Tereza Cristina de; Krzyzanowski,Francisco Carlos; Ohlson,Osvaldo de Castro; Panobianco,Maristela.
The tetrazolium test is widely used for seed vigor assessment of various plant species. For wheat, however, there is no methodology specifically recommended. This study aimed at determining an efficient procedure to evaluate vigor of wheat seeds by this test; besides allowing the establishment of seed quality classes. Thus, four different wheat seed lots were assessed by determining the moisture content and through tests of germination, accelerated aging, and field seedling emergence. The following methodologies were assessed: 1) longitudinal bisection of seed, with subsequent placement of the two halves on filter paper moistened with a 1.0% tetrazolium solution, at 30º C, for 2 h; 2) longitudinal bisection, with subsequent immersion of one seed half into...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Physiological quality; Viability.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600002

Vigor of canola seeds through quantification of CO2 emission
Provedor de dados: 64
Autores: Dranski,João Alexandre Lopes; Pinto Júnior,Artur Soares; Herzog,Neusa Francisca Michelon; Malavasi,Ubirajara Contro; Malavasi,Marlene de Matos; Guimarães,Vandeir Francisco.
Seed marks the beginning of grain production from cultivated crops. Ensuring seed quality is the priority in the field of seed technology. In this context, the purpose of this study was to evaluate the use of carbon dioxide concentration to Classify Brassica napus seed lots of different quality resulting from various sowing dates. Seed lots were evaluated by percentage of normal plantlets and the germination rate index. CO2 concentration was quantified in samples submitted to five periods of incubation at 40° C with the aid of a gas exchange analyzer coupled to an injection and airflow system. The results were subjected to analysis of variance and the mean values were compared by the Duncan test and by regression analysis at the 5% level of significance....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica napus L.; Seed respiration; Infrared gas analyser; Physiological quality.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000300005

Does the substrate affect the germination of soybean seeds treated with phytosanitary products?
Provedor de dados: 64
Autores: Rocha,Debora Kelli; Carvalho,Everson Reis; Pires,Raquel Maria de Oliveira; Santos,Heloisa Oliveira dos; Penido,Amanda Carvalho; Andrade,Dayliane Bernardes de.
ABSTRACT The use of an appropriate method that accurately expresses physiological seed quality and minimizes possible phytotoxicity by chemical products in laboratory testing with soybean seeds is relevant. The objective of this work was to evaluate the influence and infer the method adequacy for the representative evaluation of physiological quality of soybean seeds treated with phytosanitary products. Two experiments were carried out in a completely randomized design, with trial 1 in a 9×5 factorial scheme involving nine seed treatments, including fungicides and insecticides, and solutions with five osmotic potentials (0, -0.25, -0.5, -0.75 and -1.0 MPa) for wetting a paper substrate in a germination experiment, with evaluation of the normal seedlings at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed analysis; Toxicity; Glycine max; Physiological quality; Seed treatment.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100209

Maturation and germination of Vernonanthura discolor seeds
Provedor de dados: 64
Autores: Grzybowski,Camila Ribeiro de Souza; Silva,Rosemeire Carvalho da; Vieira,Elisa Serra Negra; Panobianco,Maristela.
ABSTRACT Vernonanthura discolor is a native species with potential for reclamation of degraded lands, and the manufacture of wood panels. This study has aimed to evaluate the process of maturation and germination of Vernonanthura discolor seeds, determining the harvest time, and conducting the germination test. A periodic monitoring of the reproductive development of sources of Vernonanthura discolor was conducted, located in the municipality of Bocaiúva do Sul, PR, Brazil; and starting from the anthesis, weekly collections of seeds were performed to evaluate the percentage of dry matter, germinating power, and vigor, in order to identify the physiological maturity of the seeds. In the germination test, two combinations of four temperatures (20, 30, 20-30...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological quality; Dry matter; Seed harvest.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200164