Consulta: subjectFacets:"Seed germination"
Registros recuperados: 65
Data/hora: 13/06/2024 07:57:59

Casuarina equisetifolia fitorremeciación de suelo contaminado con diesel y aplicación de bioestimulación y bioaumentación.
Provedor de dados: 32
Autores: Díaz Martínez, María Esther.
En este trabajo se evaluó la germinación de semillas y el crecimiento de plantas de C. equisetifolia L. ante diesel, y su potencial de fitorremediación en combinación de bioaumentación y bioestimulación. La primera fase experimental evaluó el efecto tóxico de 15 dosis de diesel (0, 100, 250, 500, 800, 1000, 1500, 2000, 2500, 3000, 5000, 7500, 10000, 15000 y 20000 mg kg-1) en la germinación de semillas y la emergencia de plántulas. A los 10 días, la germinación fue mayor en concentraciones altas de diesel; la mayor geminación ocurrió en 20000 mg kg-1, y la menor se registró ante 5000 mg kg-1. La emergencia de plántulas fue mayor en las concentraciones menores a 5000 mg kg-1. A los 15 días, el crecimiento de las plántulas disminuyó ante concentraciones...
Palavras-chave: Germinación; Emergencia de plantas; Simbiosis; Fertilización; Microorganismos; Degradación de hidrocarburos; Seed germination; Seedling emergence; Symbiosis; Fertilization; Microorganisms; Hydrocarbon degradation; Maestría; Edafología.
Ano: 2012
URL: http://hdl.handle.net/10521/730

The effects of ethylene on the HCl-extractability of trace elements during soybean seed germination
Provedor de dados: 69
Autores: Liu,Chunming; Zhao,Yixin; Liu,Jianfeng; Gen,Wanting; Cheng,Yunqing.
Background Ethylene is capable of promoting seed germination in some plant species. Mobilization of metals such as Fe, Cu, Mn, and Zn in mature seeds takes place when seeds are germinating. However, whether ethylene is involved in the regulation of soybean seed germination and metal element mobilization during early seed germination stage remains unknown. In the present study, seeds were treated with ethylene synthesis inhibitor aminoethoxyvinylglycine (AVG) and ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), and double distilled H2O (ddH(2)0) treatment was used as control. Ethylene emission, ACC synthase (ACS) expression, ACS enzyme activity and Ca, Zn, Mn, Cu and Fe content in hypocotyls were qualified to analyze the relationship between...
Tipo: Journal article
Palavras-chave: ACC synthase; Bioavailability; Ethylene; Metallic elements; Seed germination; Soybean.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000500001

COMPETITIVE EFFECTS OF THE ALIEN INVASIVE CENTAUREA SOLSTITIALISL. ON TWO CHILEAN BACCHARIS SPECIES AT DIFFERENT LIFE-CYCLE STAGES
Provedor de dados: 73
Autores: Gómez-González,Susana; Cavieres,Lohengrin A; Torres,Patricio; Torres-Díaz,Cristian.
Several studies have revealed a variety of mechanisms of invasion of alien plant species. However, little is known on how those mechanisms and their associated effects on native species change across different life-cycle stages. Under controlled conditions, we assessed the interactions between the alien invasive species Centaurea solstitialis L. (Asteraceae) and two pioneer native species to the Chilean matorral; Baccharis linearis (Ruiz et Pav.) Pers. and B. paniculata DC. (Asteraceae). Competitive effects of the invader on natives were evaluated by combining different life-cycle stages: seed-seed, plant-seed, and plant-plant. Seed germination of C. solstitialis was explosive and much faster than that of the native species. The presence of C. solstitialis...
Tipo: Journal article
Palavras-chave: Allelopathy; Matorral; Mediterranean; Seed germination; Yellow starthistle.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432009000100007

Negative photoblastism in the invasive specie Eschscholzia californica Cham. (Papaveraceae): Patterns of altitudinal variation in native and invasive range
Provedor de dados: 73
Autores: Castillo,María L.C; Bustamante,Ramiro O; Peña-Gómez,Francisco T; Gutiérrez,Víctor L; Reyes,Claudio A; Arredondo-Núñez,Alicia; Marey,Marilyn.
Negative photoblastism is defined as the inhibitory effect of light on seed germination. This effect can be modulated by abiotic variables, such as temperature, light condition and water potential. This conditions change notoriously at higher altitudes, could promote differentiations in the photoblastic response among populations. Also, this physiological attribute poses an interesting conflict for plant regeneration, because prevents seed germination on the soil surface, however, it can also to reduce the mortality of seeds germinants in unsuitable conditions and consequently, seedling mortality. Eschscholzia californica is one of the few species with negative photoblastism and it is invasive in Chile, growing primarily in open and disturbed places. Some...
Tipo: Journal article
Palavras-chave: Central Chile; Common garden; California poppies; Seed burial; Seed germination.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432013000200010

Inheritance of rice cold tolerance at the germination stage
Provedor de dados: 74
Autores: Cruz,Renata Pereira da; Milach,Sandra Cristina Kothe; Federizzi,Luiz Carlos.
Cold tolerance during germination is important for ensuring fast and uniform establishment of a rice crop early in the season. However, evaluation of this trait under field conditions is limited by environmental variation, which makes it difficult to identify genetically superior lines. Evaluation of cold tolerance under controlled temperature conditions may be performed by assessing percentage of reduction in coleoptile length and coleoptile growth. Our study determined the inheritance and heritability of cold tolerance at the germination stage in crosses between six rice genotypes. Diallel analysis showed that while both additive and non-additive gene action were involved, the non-additive action was relatively more important for percentage of reduction...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chilling tolerance; Oryza sativa; Rice genetics; Seed germination.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200020

Germinação de sementes de espécies amazônicas: pau-de-bálsamo [Myroxylon balsamum (L.) Harms].
Provedor de dados: 14
Autores: CRUZ, E. D.; PEROTES, K. F.
bitstream/item/227225/1/TC-46-19-COM.TEC-V06.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pau-de-bálsamo; Germinação; Semente; Beneficiamento; Myroxylon balsamum; Seed germination; Seeds.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135597

Qualidade de sementes crioulas de feijão-de corda Vigna unguiculata L. Walp.) em feira de agrobiodiversidade.
Provedor de dados: 14
Autores: DANTAS, B. F.; LIMA, P. H. C.
O feijão-de-corda é uma importante cultura para a agricultura familiar. Variedades crioulas são aquelas cujas sementes foram produzidas, selecionadas e melhoradas pelos próprios agricultores. Sementes dessas variedades geralmente são intercambiadas entre as famílias produtoras, por meio de doações, trocas e vendas em feiras da agrobiodiversidade ou dentro das comunidades. A qualidade das sementes crioulas é essencial para o desenvolvimento inicial da lavoura e sua produtividade. Assim, este trabalho teve como objetivo a avaliação da qualidade de sementes crioulas de feijão- de-corda trocadas/vendidas em uma feira da agrobiodiversidade. Foram obtidas 28 amostras de sementes, que foram avaliadas quanto a parâmetros de qualidade fisiológica das sementes...
Tipo: Folhetos
Palavras-chave: Semente Crioula; Qualidade fisiológica; Seleção dos agricultores; Semente; Feijão de Corda; Agricultura Familiar; Pequeno Produtor; Teste de Vigor; Comunidade Rural; Feira; Cowpeas; Seed quality; Seed germination; Physiological response; Vigor; Family farms.
Ano: 2023
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1151626

Germinação de sementes de espécies amazônicas: acapurana (Campsiandra laurifolia Benth.).
Provedor de dados: 14
Autores: CRUZ, E. D.; SANTOS JUNIOR, H. B. dos.
bitstream/item/178872/1/COM.TEC-300-AINFO.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Acapurana; Campsiandra laurifolia Benth; Semente Florestal; Germinação; Armazenamento; Biometria; Beneficiamento; Seed germination; Storage; Biometry.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092653

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

Recomendações para a quebra de dormência de sementes e formação de mudas de graviola (Annona muricata L.) em Rio Branco - Acre.
Provedor de dados: 14
Autores: LEDO, A. da S.; CABANELAS, C. I. L.
A gravioleira (Annona muricata L.) originária da América Central, vem sendo cultivada nas regiões Norte e Nordeste do Brasil. Esta fruteira possui ótimo mercado consumidor, com grandes perspectivas para a exportação,. Os frutos apresentam uma polpa agradável para o consumo in natura, sendo também utilizada em grande escala como matéria-prima pelas fábricas de processamento de frutas. O Centro de Pesquisa Agroflorestal do Acre - CPAF-Acre da Embrapa, desenvolveu estudos com o objetivo de avaliar diversos métodos de quebra de dormência para acelerar o processo de germinação de sementes, visando posterior recomendação para a produção de mudas de graviola.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Guanabana; Recomendações técnicas; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Sapotes agrios.; Germinación de las semillas; Quebra de dormência; Salida de la latencia; Producción de plántulas; Semente; Produção; Muda; Annona muricata; Graviola; Germinação.; Seed germination; Seedling production; Dormancy breaking.; Soursops.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492167

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

Conditions for the germination and the early growth of seedlings of Polaskia chichipe (Goss.) Backeberg and Echinocactus platyacanthus Link and Otto fa. grandis (Rose) Bravo-Hollis (Cactaceae): (with 2 tables &amp;#38; 2 figures)
Provedor de dados: 85
Autores: Rosas-López,Ulises; Collazo-Ortega,Margarita.
The effect of different combinations of chemical scarification, soaking and substrates (ex vitro and in vitro) on seed germination ofPolaskia chichipe (Goss.) Backeberg and Echinocactus platyacanthus Link &amp;#38; Otto fa. grandis (Rose) Bravo-Hollis, collected in the Tehuacan Valley, Mexico, were studied. The P chichipe seeds did not require either chemical scarification or soaking, whereas E platyacanthus required chemical scarification with strong acids. Growth and maintenance of the seedlings was evaluated in two different concentrations of Murashige-Skoog medium (50% and 100% of their components). It was found that MS 50% stimulated germination in both species and promoted seedling growth.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polaskia chichipe; Echinocactus platyacanthus; Cacti; Seed germination; Establishment; Seedling growth.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100026

Seed dormancy release and germination characteristics of Corispermum lehmannianum Bunge, an endemic species in the Gurbantunggut desert of China
Provedor de dados: 85
Autores: Zhang,LW; Liu,HL; Zhang,DY; Bian,WG.
Seed dormancy release and germination of Corispermum lehmannianum Bunge were tested using various treatments: temperature, cold stratification, gibberelins (GA3), dry storage and sand burial. Results showed that temperature and light did not affect the germination of fresh seeds, cold stratification and GA3 could improve seed germination, whereas dry storage and sand burial did not. The germination percentage was highest at 35/20 °C after the cold stratification and GA3 treatments. Corispermum lehmannianum seeds were classified as non-deep, Type-2, physiological dormancy (PD), whose seed dormancy could be released by cold stratification and GA3.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed germination; Seed dormancy; Gurbantunggut desert.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100009

Exploring Herbicidal Potential of Aqueous Extracts of Some Herbaceous Plants Against Parthenium Weed
Provedor de dados: 87
Autores: SAFDAR,M.E.; TANVEER,A.; KHALIQ,A.; ALI,H.H.; BURGOS,N.R.
To assess the phytotoxic potential of Achyranthes aspera, Alternanthera philoxeroides, Datura metel and Rumex dentatus against Parthenium hysterophorus, 5% (w/v on dry weight basis) aqueous extracts from root, stem, leaf, flower and whole plant were tested through a Petri plate-based germination and pot-cultured seedling bioassays. Achyranthes aspera and A. philoxeroides inhibited parthenium weed germination more than extracts from other species. Whole plant, leaf and fruit extracts of A. aspera reduced the germination percentage (5%); leaf extract from A. philoxeroides caused lower germination index (0.4), higher mean germination time (14 d) and longer time to 50% germination (13.5 d) of parthenium weed. In the foliar spray bioassay, A. aspera reduced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Bio-herbicides; Parthenium weed; Seed germination; Seedling growth; Weed management.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100109

Weed emergence in autumn under temperate conditions
Provedor de dados: 87
Autores: Calado,J.M.G.; Basch,G.; Carvalho,M.
The emergence of weed plants depends on environmental conditions, especially temperature and soil moisture. The latter is extremely important in Mediterranean environments which are characterized by irregular amount and distribution of rain throughout the year, which influences the beginning of the growth cycle of the annual species (seed germination). This paper studies the influence of rainfall, in particular accumulated rainfall in autumn, on the emergence of weed plants. The experiment was carried out on Luvisols, and the appearance of flora under field conditions was observed. Through analysis of the results, it can be concluded that a high percentage of weed plants (&gt; 85% related to the highest registered value) was obtained with more than 90 mm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seasonal emergence; Mediterranean climate; Rainfall; Seed germination; Soil moisture.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000200012

Seed germination and seedling emergence of velvetleaf (Abutilon theophrasti) and Barnyardgrass (Echinochloa crus-galli)
Provedor de dados: 87
Autores: Sadeghloo,A.; Asghari,J.; Ghaderi-Far,F.
Abutilon theophrasti and Barnyardgrass (Echinochloa crus-galli) are major weeds that affect cropping systems worldwide. Laboratory and greenhouse studies were conducted to determine the effects of temperature, pH, water and salinity stress, and planting depth on seed germination and seedling emergence of Velvetleaf and Barnyardgrass. For Velvetleaf, the base, optimum and ceiling germination temperatures were estimated as 5, 35 and 48 ºC, respectively. Seed germination was sensitive to drought stress and completely inhibited by a potential of -0.6 MPa, but it was tolerant to salinity. Salinity stress up to 45 mM had no effect on the germination of Velvetleaf, but germination decreased with increasing salt concentration. Drought and salinity levels for 50%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PH; Planting depth; Seed germination; Temperature; Weed.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200003

Thermal-biological aspects on the seed germination of Cucumis anguria L.: influence of the seed coat
Provedor de dados: 88
Autores: SANTOS,DÉBORA LEONARDO DOS; CARDOSO,VICTOR JOSÉ MENDES.
The seed coat influences the early stages of germination of many seeds and sometimes maintains seed dormancy. Early reports have shown that the testa influences the germination response of Cucumis anguria seeds to light although the response to temperature as influenced by the tegument is not well understood. The main purpose of this study was to observe the influence of the testa on the germination of Cucumis anguria by using parameters as germinability and isothermal germination rate. The assays were carried out in a thermal-gradient block with water imbibed seeds kept in darkness. Estimates of the activation enthalpies (deltaH) show |deltaH| &lt; 50 kJ.mol-1 between 26.1 °C and 35.2 °C (intact seeds) and between 25.4 °C and 35.2 °C (scarified seeds),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis anguria; Seed germination; Temperature; Tegument; Thermal-biology.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000400009

Calculating germination measurements and organizing spreadsheets
Provedor de dados: 88
Autores: Ranal,Marli A.; Santana,Denise Garcia de; Ferreira,Wanessa Resende; Mendes-Rodrigues,Clesnan.
With the objective to minimize difficulties for beginners we are proposing the use of a conventional spreadsheet for the calculations of the main germination (or emergence) measurements, the organization of the final data for the statistical analysis and some electronic commands involved in these steps.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Germination rate; Germination time; Seed germination; Synchrony; Uncertainty.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000400022

Hybridization among wild passionflower species
Provedor de dados: 88
Autores: Conceição,Léo Duc Haa Carson Schwartzhaupt da; Souza,Margarete Magalhães; Belo,Gabriela de Oliveira; Santos,Sheila Félix dos; Freitas,Jôsie Cloviane Oliveira de.
(Hybridization among wild passionflower species). Passion fruits are appreciated for their ornamental value, since their flowers are showy and display a wide variety of colors. In addition, many hybrids have been produced and used in other countries. The genotypes used in selection of plants with ornamental characteristics are hybrid progenies which are used in various crossing strategies. Thus, the aim of this work was to obtain interspecific hybrids, perform backcrossing and obtain progenies from crossings between hybrids, and to determine the reproductive compatibility between the progenitors involved. The percentage of fertilized flowers, germination, and the number of fruits, seeds and plants obtained through crossing were recorded. A series of 374...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Interspecific crossing; Ornamental plants; Passiflora; Seed germination.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000200011

Lectins from Pisum arvense seeds behave differently from storage proteins during germination in the darkness
Provedor de dados: 93
Autores: SILVA,LUIZA IZABEL M. MOREIRA DA; RAMOS,MÁRCIO VIANA; CAJAZEIRAS,JOÃO BATISTA; FERREIRA,PATRÍCIA RODRIGUES; CARVALHO,CARLOS ALBERTO V.; GRANGEIRO,THALLES BARBOSA; NUNES,EDSON PAULA; SAMPAIO,ALEXANDRE HOLANDA; FREITAS,BEATRIZ TUPINAMBÁ; SILVEIRA,JOAQUIM ALBENÍSIO G. DA; CAVADA,BENILDO SOUSA.
ABSTRACT - The mobilization of seed proteins from Pisum arvense L. during germination in the absence of light was studied. The seeds were found to be completely consumed 22 days after germination and seedlings ceased growth after the 18th day. SDS-PAGE indicated that the main protein bands correspond to high molecular mass storage proteins which undergo proteolysis in the initial stages of germination and are not detected after the 7th day of germination. However, the corresponding lectin profiles were detected during the entire germination process, suggesting that these proteins are strongly resistant to seed proteolytic enzymes and should be important for seedling establishment. Furthermore, haemagglutinating activity in cotyledons was detected until 22...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lectin; Protein mobilization; Seed germination.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300008

Advances in passion fruit (Passiflora spp.) propagation
Provedor de dados: 94
Autores: Faleiro,Fábio Gelape; Junqueira,Nilton Tadeu Vilela; Junghans,Tatiana Góes; Jesus,Onildo Nunes de; Miranda,Diego; Otoni,Wagner Campos.
Abstract  The propagation of many passion fruit species (Passiflora spp.) is done by seeds or sexual method, although asexual propagation, such stem cuttings, grafting or tissue culture is also possible and very useful in many cases. In this work, it was presented information on scientific and technological advances in sexual and asexual propagation of passion fruit, considering the different propagation methods and their applications. New demands for research and development activities are also related, given the wide range of passion fruit species and its potential for food, ornamental and medicinal use.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed germination; Vegetative propagation; Cuttings; Grafting; Tissue culture.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000201002

Abiotic alterations caused by forest fragmentation affect tree regeneration: a shade and drought tolerance gradient in the remnants of Coastal Maulino Forest
Provedor de dados: 97
Autores: GUERRERO,PABLO C; BUSTAMANTE,RAMIRO O.
Plant regeneration is strongly determined by light and soil moisture differences between habitáis; both variables are modified by large-scale forest fragmentation. Several studies have indicated this alteration as the mechanism involved in tropical forest community change. The effects of fragmentation may be much more severe in Mediterranean and deciduous forests, because plant species in these forests show a stress tolerance tradeoff between shade and drought. Our study was performed in the deciduous fragmented Coastal Maulino Forest: Reserva Nacional Los Queules (RNLQ) and surrounding small fragments. We hypothesised that Aristotelia chilensis (shade intolerant but drought tolerant) should increase its regeneration in small patches as a consequence of...
Tipo: Journal article
Palavras-chave: Ecological restoration; Forest fragmentation; Safe sites; Seed germination; Seedling establishment.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2009000300008

'Aroeira-branca' [Lithraea molleoides (Vell.) Engl. - Anacardiaceae] seed quality evaluation by the X-ray test
Provedor de dados: 63
Autores: Machado,Cibele Ferreira; Cícero,Sílvio Moure.
'Aroeira-branca', an arboreal species of great ecological and economic importance, is seed propagated and presents limitations with respect to the availability of methods for seed quality evaluation. The X-ray test has been considered of potential value because it is accurate, quick and nondestructive. In this context, the objective of this work was to verify the possibility of this test to detect damage and/or abnormalities in aroeira-branca embryos, in an attempt to correlate these anomalies to germination. Four seed lots were collected in different locations in the southern region of the State of Minas Gerais, Brazil, during 2001. The X-ray test consisted of submitting 100 seeds/lot to radiation (exposure of seeds to radiation of 13 kV/5 minutes) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Radiography; Embryo morphology; Seed germination; Forest species.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200026

Plant bioassays to assess toxicity of textile sludge compost
Provedor de dados: 63
Autores: Araújo,Ademir Sérgio Ferreira; Monteiro,Regina Teresa Rosim.
Composting of industrial wastes is increasing because of recycling requirements set on organic wastes. The evaluation of toxicity of these wastes by biological testing is therefore extremely important for screening the suitability of waste for land application. The toxicity of a textile sludge compost was investigated using seed germination and plant growth bioassays using soybean and wheat. Compost samples were mixed with water (seed germination bioassay) or nutrient solution (plant growth bioassay) at concentrations of 0, 19, 38, 76 and 152 g L-1. No negative effects were observed after five days of compost water-extract in relation to soybean and wheat seed germination. After fifteen days, under a hydroponics system, plant growth had harmful effects of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytotoxicity; Seed germination; Solid residue; Hydroponics.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300013

Progress report on applied experiments
Provedor de dados: 106
Autores: Sakamoto, Haruhiko; Somrak Noradechanon.
7 ill., 9 tables
Palavras-chave: Corn; Maize; Sorghum; Intensive irrigation; Seed storage; Seed germination; Fertilizers; Plant population; Varieties; Crop rotation; Reddish brown lateritic; Yields; Agronomic characters; ข้าวโพด; ข้าวฟ่าง; การให้น้ำ; การทดสอบผลผลิต; การผลิต.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4112

ผลของวัสดุที่ใช้ทำ Stratification 3 ชนิด ต่อการงอกของเมล็ดสาลี่พันธุ์ Nyao Li
Provedor de dados: 106
Autores: Napaporn Suksanguan.
Special Problem (B.S. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Nyao Li; Seed germination; Strati; สาลี่; เมล็ด; วัสดุเพาะ; การงอก; การเจริญเติบโต.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5519

In vitro germination and growth of Vriesea incurvata Gaudich. (Bromeliaceae)
Provedor de dados: 109
Autores: Pulido-Rueda,Edwin Ernesto; Milaneze-Gutierre,Maria Auxiliadora; Negrelle,Raquel.
Abstract Vriesea incurvata in the natural environment shows some difficulties associated to the low seed germination capacity. Aiming to provide basis for the seedlings production, the results of the seeds germination percentage and the initial growth of V. incurvata seedlings in vitro conditions in different culture media, are reported. Completely randomized design was comprised of eight treatments and eight replications. The treatments were as culture media: MS (Murashige &amp; Skoog); MS%; KC (Knudson); KC%; MS + activated carbon (AC); MSV2 + AC; KC + AC; and KCV2 + AC. The germination percentage was calculated from the division between the number of seeds with primary root extrusion by the total number of sowed seeds. The initial growth was evaluated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromeliaceae; Culture media; In vitro propagation; Native plant; Seed germination.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100140

Development of artificial sugarcane seed CP-54 from three cultivars (cv MEX 69-290; cv MEX 68-P-23; cv. CP 72-2086) using polymers in Tabasco, Mexico
Provedor de dados: 109
Autores: Álvarez-Sánchez,Geiner F; Arias-de la Cruz,Heidi L; Salgado-García,Sergio; Córdova-Sánchez,Samuel; Ortiz-Laurel,Hipólito; Castelán-Estrada,Mepivoseth; García-de la Cruz,Rubén; Castañeda-Ceja,Raúl.
Abstract Precision mechanized sowing of sugarcane has been delayed due to germination failures caused in sowing process by pieces of sugarcane, generating economic losses by reducing production. The aim of this study was to evaluate different polymers and cultivars of sugarcane to elaborate artificial seed CP-54, seed germination and quality of sugarcane plants. An experiment was carried out in two stages in experimental field of the Colegio de Postgraduados Campus Tabasco, Mexico. Results indicate that the best physical stage of artificial seed CP-54 was obtained in Mex 69-290, Mex 68-P-23 and CP 72-2086 cultivars encapsulated with starch polymers and sodium alginate. Artificial seed CP-54 germination was 100 and 84% encapsulated with starch and alginate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Encapsulation; Precision agriculture; Saccharum spp.; Seed germination; Buds; Sugarcane response.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100094

SEED GERMINATION AND PLANT DEVELOPMENT IN Escobedia grandiflora (OROBANCHACEAE): EVIDENCE OF OBLIGATE HEMIPARASITISM?
Provedor de dados: 37
Autores: CARDONA-MEDINA,Edison; MURIEL RUIZ,Sandra B.
Root parasitic plants can be facultative or obligate. Facultative parasites are able to complete their life cycle and their seeds can germinate without a host. Escobedia grandiflora is a poorly studied species in spite of its ancestral importance as dye of foods and medicinal use. The present study evaluates the states of seed, seedlings and mature plants, under presence and absence of possible hosts, for inferring the type of parasitism exhibited by E. grandiflora. Seeds were evaluated using two conditions each of light (12 and 0 hours) and temperature (20 °C and 25 °C); percentage germination, and germination speed were determined. The seeds did not require a host to germinate, as is typical of facultative parasitic plants. Percentage of germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Escobedia; Obligate hemiparasite; Parasitic plant; Root parasitism; Seed germination.
Ano: 2015
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000300011

Effects of salinity on seed germination, seedling growth and survival of Spartina ciliata Brong
Provedor de dados: 39
Autores: Cordazzo,César Vieira.
The effects of different salinities on the germination of Spartina ciliata seeds were tested during 40 days in the laboratory, using six concentrations of NaCl (0,45, 80, 130, 170 and 215 mM) besides three concentrations of seawater (25,30 and 35‰). In addition, the survival and growth of seedlings were tested in five constant salinity regimes (0,45, 80 and 170 mM NaCl) as well as in five regimes of simulating seawater overwash. The results showed that seeds possed a high germination capacity over a wide range of salinities (0 to 215 mM NaCl). Although concentrations close to full-strength seawater completely inhibited seed germination, the transfer of the ungerminated seeds to freshwater immediately stimulated this. The effects of salinity on seedling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity stress; Seed germination; Seedling growth; Coastal dune plant; Spartina ciliata.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061999000300012

Key factors affecting seed germination of Copaifera langsdorffii, a Neotropical tree
Provedor de dados: 39
Autores: Souza,Matheus Lopes; Silva,Dávila Regina Pacheco; Fantecelle,Laura Bubantz; Lemos Filho,José Pires de.
In natural conditions biotic and abiotic factors interact, synergistically affecting seed germination. In this study, we experimentally simulated natural conditions that occur during seed dispersal that can affect the germination of Copaifera langsdorffii. Specifically we evaluated the effect of aril removal by different dispersal agents (birds and ants) and fire on germination. The seeds were submitted to the following treatments: Control (seeds placed to germinate with aril intact); Acid (simulation of passage through the digestive tract of a bird); Aril removal (simulation of aril removed by ants); Fire (seeds exposed to fire). Germination percentage and time varied among treatments (X²=89.735, P&lt;0.001; X²=16.225, P&lt;0.001, respectively). None of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Copaifera langsdorffii; Fire; Plant-disperser interaction; Seed germination.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400473

Non-overlap of hosts used by three congeneric and sympatric loranthaceous mistletoe species in an Amazonian savanna: host generalization to extreme specialization
Provedor de dados: 39
Autores: Fadini,Rodrigo Ferreira.
Two main hypotheses predominate in the literature on mistletoe-host specificity: (1) mistletoes are only likely to specialize on plant species on which they are frequently deposited; and (2) compatibility between mistletoes and plant species is a prerequisite for mistletoe-host parasitism. I explored these hypotheses by studying the seed deposition patterns and mistletoe-host compatibility in populations of three congeneric and sympatric mistletoe species of the genus Psittacanthus (P. biternatus, P. eucalyptifolius and P. plagiophyllus - Loranthaceae). I recorded the presence or absence of these mistletoe species in 15 tree species in a savanna patch in Amazonia. Among the five tree species that I found to be potential hosts (at least one tree individual...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Host specifi city; Loranthaceae; Psittacanthus; Resource-fragmentation hypothesis; Seed germination; Seedling establishment.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200010

Fungi associated with Copaifera oblongifolia (Fabaceae) seeds: occurrence and possible effects on seed germination
Provedor de dados: 39
Autores: Fernandes,Elio Gomes; Valério,Henrique Maia; Duarte,Karen Luiza Rodrigues; Capuchinho,Lauany Matos de Novais; Fagundes,Marcílio.
ABSTRACT Copaifera oblongifolia is a recurrent plant species in degraded areas yet there is little information about its seed biology and interactions with fungi. The aims of this study were to identify the fungal community (endophytic and non-endophytic) associated with C. oblongifolia seeds and to test the effects of these different fungal species on germination. In general, germination of C. oblongifolia seeds was high (about 85 %), initiating four days after sowing and continuing for a total of 20 days. External asepsis with sodium hypochlorite did not influence germinability of C. oblongifolia. Seed infestation with Aspergillus niger, A. flavus, Mucor sp. and Rhizopus stolonifer did not affect the time required for germination, however, infection with...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Endophytic classification; Endophytic fungi; Saprophytic fungi; Seed germination; Seed-fungus interactions.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100179

Maternal habitat affects germination requirements of Anabasis setifera, a succulent shrub of the Arabian deserts
Provedor de dados: 39
Autores: El-Keblawy,Ali; Gairola,Sanjay; Bhatt,Arvind.
The effects of maternal habitat on light and temperature requirements during germination were assessed for the succulent desert shrub Anabasis setifera. Seeds were collected from the Mediterranean habitats of Egypt and the hyper-arid subtropical habitats of the United Arab Emirates (UAE). Seeds from the two populations were germinated in three temperature treatments in both a light/dark regime and continuous darkness. Seeds from the Egyptian population germinated significantly greater and faster than those of UAE. Seeds stored for four months at room temperatures have little dormancy and germinate at wide range of temperatures and light conditions, but seeds stored four months in the natural habitat lost their ability to germinate and rotted 10 days after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anabasis setifera; Desert; Halophyte; Maternal habitat; Seed germination.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100035

Do fruit morphology and scarification affect germination and predation rates of Babassu seeds?
Provedor de dados: 39
Autores: Ferreira,Paulo Henrique Gonçalves; Nunes,Yule Roberta Ferreira; Faria,Maurício Lopes; Brandão,Murilo Malveira; Costa,Cibele Stramare Ribeiro; Valério,Henrique Maia; Melo,Geraldo Aclécio; Pimenta,Marcio Antonio Silva.
ABSTRACT Seed predation is a natural phenomenon that can occur either before or after dispersal and can significantly reduce the economic value and reproductive potential of plants. The babassu palm (Attalea vitrivir, Arecaceae) is important to rural communities that extract oil from its fruits for a wide variety of uses. We evaluated the predation and germination of A. vitrivirseeds in Pandeiros River Environmental Protection Area (EPA-Pandeiros) in Minas Gerais State, Brazil. Sixty individual plants were evaluated to determine their fruiting patterns. Seed predation and germination were evaluated in the natural environment for eight months for fruits divided into two treatments: scarified and intact. Germination of fruits submitted to these same...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arecaceae; Attalea vitrivir; Babassu palm; Fruit; Seed germination; Seed predation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400658

The role of the seed coat in the light sensivity in Raphanus sativus L. cv. redondo gigante seeds
Provedor de dados: 39
Autores: Gonçalves,Maura Lúcia Costa; Takaki,Massanori.
The role of the seed coat in the light sensitivity of seeds of Raphanus sativus L. cv. redondo gigante was analysed by germination tests of intact and naked seeds. Far-red light caused high inhibition of seed germination, while under white and red lights low inhibition was found. Naked seeds presented no light sensitivity with high percentage germination under light and darkness. However, incubation of naked seeds in -0.6MPa polyethylene glycol solution resulted in light inhibition as observed in intact seeds. The analysis of the seed coat transmitted light indicated that the filtered light presented the same photoequilibrium of phytochrome when compared to the white light, with a decrease of only 33% in the light irradiance which reaches the embryo.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed germination; Raphanus sativus; Seed coat; Phytochrome.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061997000100006

Light and temperature requirements for germination of seeds of Aechmea nudicaulis (l.) Griesebach and Streptocalyx floribundus (Martius ex Shultes f.) Mez (Bromeliaceae)
Provedor de dados: 39
Autores: Pinheiro,Fernanda; Borghetti,Fabian.
Seeds of A. nudicaulis and S. floribundus were collected in a restinga located at Presidente Kennedy (ES, Brazil). This sandy community is characterized by the presence of patches of vegetation interspersed by open areas with a sparse plant covering. In order to evaluate the capacity of A. nudicaulis and S. floribundus to recruit individuals from seeds in the distinct microclimates generated by this heterogeneous plant covering, experiments were conducted in laboratory to test the effects of light and temperature on the germination for both species. Seeds of A. nudicaulis were unable to germinate in darkness but they achieved high germinability (≥90%) from 15 to 40°C under red light. Seeds of S. floribundus germinated in darkness only at 40ºC (22.5%),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aechmea nudicaulis; Streptocalyx floribundus; Restinga; Seed germination; Temperature.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062003000100003

Efeito do período de envelhecimento acelerado no teste de condutividade elétrica e na qualidade fisiológica de sementes de feijão
Provedor de dados: 1
Autores: Binotti, Flávio Ferreira da Silva; UNESP; Haga, Kuniko Iwamoto; UNESP; Cardoso, Eliana Duarte; UNESP; Alves, Charline Zaratin; UNESP; Sá, Marco Eustáquio de; UNESP; Arf, Orivaldo; UNESP.
A qualidade das sementes colocadas à disposição do produtor é de grande importância para obtenção de altas produtividades. O objetivo do trabalho foi avaliar os efeitos causados por diferentes períodos de envelhecimento artificial na lixiviação de açúcares, proteínas, aminoácidos e íons no exsudato do teste de condutividade elétrica, e suas relações com a germinação e vigor de sementes de feijão da cultivar Pérola. O trabalho foi conduzido no Laboratório da FE de análises de sementes - Unesp Campus de Ilha Solteira. O delineamento experimental foi o inteiramente casualizados, sendo que as sementes foram submetidas a oito períodos de envelhecimento acelerado (zero, 24, 48, 72, 96, 120, 144 e 168 horas). A germinação e vigor de sementes de feijão cultivar...
Palavras-chave: 5.01.03.05-9    Melhoramento Vegetal Phaseolus vulgaris L.; Lixiviados; Proteínas; Íons; Germinação; Vigor 5.01.03.05-9    Melhoramento Vegetal Phaseolus vulgaris L.; Leakage; Protein; Ions; Seed germination; Vigor.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1736

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

Does polymer-based encapsulation enhance performance of plant growth promoting microorganisms? A meta-analysis view
Provedor de dados: 115
Autores: Pacheco-Aguirre,J. Alberto; Ruíz-Sánchez,Esau; Ballina-Gómez,H. Salomón; Alvarado-López,C. Juan.
Abstract Various studies have been undertaken to evaluate the effect of polymer-based encapsulation on performance of plant growth promoting microorganism. However there is no systematic analysis about the performance of these microorganisms when encapsulated in a polymer-based matrix. Relevant published papers were retrieved by conducting searches in Google Scholar, Only Library, Science Direct, Springer Journal, Taylor &amp; Francis and Wiley Online Library. An examination of 117 articles was carried out and of those only 11 satisfied our criteria for inclusion into the meta-analysis. From these articles, we selected 41 cases to be evaluated. We used as keywords “microcapsules”, “capsules”, “microorganisms”, “growth”, “promoting”, “germination”...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacillus sp.; Inoculant; Microcapsules; Plant growth; Seed germination.
Ano: 2017
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952017000200173

Flavonoids from leaves of Derris urucu: assessment of potential effects on seed germination and development of weeds
Provedor de dados: 42
Autores: SILVA,EWERTON A.S. DA; LÔBO,LÍVIA T.; SILVA,GEILSON A. DA; SOUZA FILHO,ANTONIO PEDRO DA S.; SILVA,MILTON N. DA; ARRUDA,ALBERTO C.; GUILHON,GISELLE M.S.P.; SANTOS,LOURIVALDO S.; ARRUDA,MARA S.P.
In some previous studies, we described the isolation of nine compounds from leaves of Derris urucu, a species found widely in the Amazon rainforest, identified as five stilbenes and four dihydroflavonols. In this work, three of these dihydroflavonols [urucuol A (1), urucuol B (2) and isotirumalin (3)] were evaluated to identify their potential as allelochemicals, and we are also reporting the isolation and structural determination of a new flavonoid [5,3′-dihydroxy-4′-methoxy-(7,6:5″,6″)-2″,2″-dimethylpyranoflavanone (4)]. We investigated the effects of the dihydroflavonols 1-3 on seed germination and radicle and hypocotyl growth of the weed Mimosa pudica, using solutions at 150 mg.L–1. Urucuol B, alone, was the substance with the greatest potential to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Derris urucu; Flavonoids; Allelopathy; Development of weeds; Seed germination.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000300881

Germination responses of the invasive Calotropis procera (Ait.) R. Br. (Apocynaceae): comparisons with seeds from two ecosystems in northeastern Brazil
Provedor de dados: 42
Autores: LEAL,LAURA C.; MEIADO,MARCOS V.; LOPES,ARIADNA V.; LEAL,INARA R.
Life history traits are considered key indicators of plant invasibility. Among them, the germination behavior of seeds is of major relevance because it is influenced by environmental factors of invaded ecosystem. Here, we investigated how seed traits and seed tolerance to environmental factors on seed germination of Calotropis procera vary depending on the invaded ecosystems in northeastern Brazil. We have tested seeds from two vegetation types – Caatinga and Restinga – to different levels of light intensity, salinity, and water stress. Previous to those experiments, seed-set and morphometric analysis were carried out for both studied populations. We have observed a higher seed-set in Caatinga. Seeds produced in this ecosystem had lower seed moisture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological invasions; Caatinga; Environmental factors; Restinga; Seed germination; Seed-set.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301025

N deposition affects allelopathic potential of Amaranthus retroflexus with different distribution regions
Provedor de dados: 42
Autores: WANG,CONGYAN; LIU,JUN; ZHOU,JIAWEI.
ABSTRACT This study aims to determine the allelopathic potential of Amaranthus retroflexus (Ar) with different climatic zones on seed germination and growth of A. tricolor (At) treated with a gradient N addition. Ar leaf extracts only displayed significantly allelopathic potential on the underground growth of Ar but not the aboveground growth of At. The allelopathic potential of Ar leaf extracts on root length of At were enhanced under N addition and there may be a N-concentration-dependent relationship. The effects of the extracts of Ar leaves that collected from Zhenjiang on seed germination and growth of At may be higher than that collected from Jinan especially on root length of At under medium N addition. This reason may be the contained higher...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathic potential; Invasive plant; N deposition; Seed germination; Amaranthus retroflexus.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300919

Genetic and chemical diversity in seeds of cactus mandacaru (Cereus sp.) from two edaphoclimatic regions contrasting
Provedor de dados: 42
Autores: Bevilaqua,Maycon R.R.; Santana Filho,Arquimedes P.; Mangolin,Claudete A.; Oliveira,Arildo J.B.; Machado,Maria De Fátima P.S.
The purpose of this study was to evaluate the chemical, physiological and genetic differences in seeds of cactus of the Cereus genus (mandacaru) cultivated in the Northeast (Picos, State of Piauí) and Southern (Maringá, State of Paraná) regions of Brazil. Over a period of eight days, temperatures of 25°C and 30°C were equally efficient for the germination of all the seeds. Oleic acid (C18:1) was the most common fatty acid found in the seeds collected in the Southern (41%) and Northeast (45.5%) regions. The analysis of lipases indicated that seeds from Maringá have high mean observed and expected heterozygosities and that seeds from Picos have a higher number of alleles per loci. Therefore, the seeds of mandacaru from the semiarid region of Northeast as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cactus; Cereus peruvianus; Cereus jamacaru; Seed germination; Fatty acids; Lipases; Genetic diversity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200765

Investigation on the effects of guava (Psidium guajava L.) infusions on germination, root tips and meristematic cells of Latuca sativa
Provedor de dados: 42
Autores: Luber,Jaquelini; Palmieri,Marcel J.; Botelho,Carolina M.; Rinaldo,Daniel; Andrade-Vieira,Larissa F.
Guava (Psidium guajava L.) is a plant often employed in popular medicine. Recently several studies have alerted about the toxicity of substances present in medicinal plants, which can pose risks to the human health. In this sense, the present work aimed to investigate the phytotoxic, cytotoxic and genotoxic action of three guava varieties - Paluma, Pedro Sato and Roxa ("purple") - on the plant test system Lactuca sativa L. Thus, macro- and microscopic evaluations were carried out for five infusion concentrations (2.5, 5.0, 10.0, 20.0 and 40.0 g.L-1) prepared from each variety. Distilled water was used as negative control. Chromatographic and spectroscopic analysis by HPLC-PAD indicated that the chemical composition of the infusion of Roxa is different than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citogenetoxicity; Root growth; Mitotic index; Seed germination; IC50.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200903

Potential seed dispersal by Didelphis albiventris (Marsupialia, Didelphidae) in highly disturbed environment
Provedor de dados: 49
Autores: Cantor,Mauricio; Ferreira,Letícia Andrade; Silva,Wesley Rodrigues; Setz,Eleonore Zulnara Freire.
Urban forests are usually isolated and highly disturbed, however they are important shelters for tolerant animal species. Their food habits expose the different ecological roles these animals perform in the habitat. We analyzed the contribution of Didelphis albiventris Lund (1840), as a seed disperser, to the vegetation renewal of an urban forest fragment, describing its frugivorous diet and testing the viability of ingested seeds. Both male and female of white-eared opossum included a vast variety of items in their diet, mainly invertebrates and fruits. Fruits were consumed during all year round and seasonality was not observed. The majority of consumed fruits was from pioneer plant species, which is common in disturbed areas, in accordance to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Didelphimorphia; Seed dispersal; Seed germination; Forest restoration; Remnant forest; Didelphis albiventris.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000200004

The germination of seeds of Epiphyllum phyllanthus (L.) Haw. (Cactaceae) is controlled by phytochrome and by nonphytochrome related process
Provedor de dados: 49
Autores: Simão,Edson; Nakamura,Adriana Tiemi; Takaki,Massanori.
The Epiphyllum phyllanthus seeds present high sensitivity to light and their germination can be promoted by dim green safe light through the very low fluence response mediated by phytochrome A. Part of seed population have phytochrome B in active form (Pfr) enough to promote germination in darkness. Seeds of Epiphyllum phyllanthus germinate in a wide temperature range from 10 to 40°C, reaching complete germination in the range of 15 to 30°C. Above 35°C the germination rate increases indicating control by a non phytochrome related process. The analysis of kinetics of seed germination indicated that the phytochrome A control is less dependent on temperature than phytochrome B controlled process.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed germination; Very low fluence response; Low fluence response.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000100011

The role of avian frugivores on germination and potential seed dispersal of the Brazilian Pepper Schinus terebinthifolius
Provedor de dados: 49
Autores: D'Avila,Graziele; Gomes-Jr,Antonio; Canary,Ana Carolina; Bugoni,Leandro.
Frugivorous birds play a key role in seed dispersal and establishment of a range of plant species, including invasive weeds, such as the Brazilian Pepper Schinus terebinthifolius. The potential of seed dispersal of Schinus by birds with varied feeding behaviours was studied through seed-viability tests and germination experiments using seeds obtained from birds in the field and birds kept in captivity. It was found that seeds collected after gut passage in five bird species in the field had higher proportion of germination as well as higher germination rates compared to the control seeds. Viability of seeds ingested by the Blue-and-yellow Tanager Thraupis bonariensis, which mandibulates seeds before ingesting, was significantly lower than control seeds,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Frugivory; Seed germination; Invasive species; Weed species; Restoration.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000300004

Effect of light and temperature on seed germination in Tibouchina mutabilis (Vell.) Cogn. (Melastomataceae)
Provedor de dados: 49
Autores: Simão,Edson; Takaki,Massanori.
The effect of light and temperature on Tibouchina mutabilis seed germination was analyzed by isothermic incubations in the range of 10 to 40 °C, with 5 °C intervals under both continuous white light (32.85 µmolm-2s-1) and darkness and alternating temperatures (15-20; 15-25; 15-30; 15-35; 20-25; 20-30; 20-35; 25-30; 25-35 and 30-35 °C) under both photoperiod of 12 hours and continuous darkness. The seeds of T. mutabilis need light to trigger the germination and no germination was observed in darkness. The range of optimum temperatures for germination was between 25 to 30 °C and the 20-25 °C alternating temperatures. These results indicate that T. mutabilis behaves as a pioneer species and daily alternating temperatures did not change the light sensitivity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Light; Phytochrome; Seed germination; Tibouchina.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000200006

Physical seed dormancy in native legume species of Argentina
Provedor de dados: 51
Autores: Galíndez,Guadalupe; Ceccato,Diana; Malagrina,Gisela; Pidal,Bárbara; Chilo,Gladys; Bach,Hernán; Fortunato,Renée; Ortega-Baes,Pablo.
Leguminosae is a family with high value of use for food, medicine, forage, ornamental and restoration ecology purposes. One obstacle for the use and management of many legume species is the presence of seeds with physical dormancy. Here, we evaluated the presence of physical dormancy in nine native species of Argentina and identified possible methods for breaking dormancy. Caesalpinia gilliesii, Geoffroea decorticans, and Prosopis alpataco have seeds with no physical dormancy, whereas Crotalaria incana, C. pumila, C. stipularia, Desmanthus virgatus, Galactia texana, and Senna aphylla have seeds with physical dormancy. The most effective methods for breaking physical dormancy were mechanical and wet heat (100°C) scarification for Crotalaria spp.;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leguminosae; Physical dormancy; Scarification; Seed germination.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000100006

The epiphytic Cactaceae Hylocereus setaceus (Salm-Dick ex DC.) ralf bauer seed germination is controlled by light and temperature
Provedor de dados: 52
Autores: Simão,Edson; Socolowski,Fábio; Takaki,Massanori.
The effect of light and temperature on seed germination in Hylocereus setaceus was analyzed by isothermic incubations under continuous white light and darkness. The minimum temperature for germination was between 5 to 10°C and the maximum between 45 to 50°C. The optimum temperaturewais between 25 and 30°C. The involvement of phytochrome, by very low fluence response, in controlled seed germination was attained by incubation in a gradient of photoequilibrium of phytochrome. The results indicated that seeds of H. setaceus germinated in a wide range of temperature, under canopy and in open areas, but in complete darkness they did not germinate.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endangered cactus; Phytochrome; Seed germination.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400011

Phytochrome and temperature control of seed germination in Muntingia calabura L. (Elaeocarpaceae)
Provedor de dados: 52
Autores: Leite,Idalina T. de A.; Takaki,Massanori.
The temperature range of germination of seeds of Muntingia calabura L. was 15-35° C and the optimum temperature at 35° C where more seeds germinated at short period. The fluence response curves demonstrated the involvement of phytochrome in the control of germination through the low fluence response. The effect of photoperiod showed that the species need long daily exposures to white light and that shade light inhibited completely seed germination, confirming as pioneer species that colonized only large gaps in the forest.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed germination; Phytochrome; Light; Temperature; Muntingia calabura.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000300012

Achene dimorphism in Bidens pilosa L. (Asteraceae) as determined by germination test
Provedor de dados: 52
Autores: Amaral,Adriana; Takaki,Massanori.
The germination of achenes of Bidens pilosa L. was analyzed during the life span of the mother plant. Decrease in the range of achene size was monitored until the senescence of the mother plant when the shortest achenes were harvested. The analysis of the germination percentage confirmed the presence of two distinct classes, formerly defined as short and long ones. Because length can not be used for the separation of those classes, the morphological characteristics of the tegument, specially of the ornament must be used for separation of the achenes with verrucose tegument (formerly named as short achenes) and achenes without ornament of the tegument (formerly named as long achenes). The achenes with verrucose tegument presented dormancy and light...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bidens pilosa; Seed dimorphism; Phytochrome; Seed germination.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000100002

Germination of Jacaranda mimosifolia (D. Don - Bignoniaceae) seeds: effects of light, temperature and water stress
Provedor de dados: 52
Autores: Socolowski,Fábio; Takaki,Massanori.
Investigations were carried out to study the effect of light, temperature and water stress on the germination of seeds of Jacaranda mimosifolia which showed the minimum and maximum germination temperature at 15 and 40º C, respectively. The optimum temperature was 25º C with high percentage and germination rate. Slight promotive effect of white light was observed. Under water stress conditions the effect of light was high but at optimum temperature no effect of light was observed. At -0.9MPa few seeds germinated.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jacaranda mimosifolia; Seed germination; Phytochrome; Water stress; Light sensitivity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500014

Germination in seed species ingested by opossums: implications for seed dispersal and forest conservation
Provedor de dados: 52
Autores: Cáceres,Nilton Carlos; Monteiro-Filho,Emygdio Leite de Araújo.
Seed germination in plant species consumed by opossums, genus Didelphis, was investigated in southern Brazil, in order to improve knowledge of the strategies of zoochorous plants in the Neotropics. Seeds were obtained from opossum feces. Thirteen of the most frequent species in the diet of local opossums were tested for germination rates and germination responses under different qualities (red/far red ratio) and different intensities of light. Most seeds from feces germinated similarly to the control groups, except for seeds of Rubus rosifolius, which appeared to depend on gut passage. Other experiments revealed that most seeds in the opossums' diet were of pioneer species, with most germination occurring during favorable humid conditions in the rainy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed germination; Light quality; Dormancy; Marsupials.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000700002

Effects of different temperatures on the performance of seeds germination of Cecropia pachystachya Trec. (Cecropiaceae)
Provedor de dados: 52
Autores: Pilati,Rosemari; Andrian,Izabel de Fátima; Carneiro,José W. P.
Seed germination of Cecropia pachystachya Trec. was investigated at 25, 30, and 35ºC using fluorescent day lights. Ten replicates each of 200 seeds were used in each thermal treatment. Germitest® paper, CEL-065®, and 11x11x5 cm Gerbox® were also used. The frequencies of radicle protrusions were counted at consecutive two hour intervals. The cumulative frequencies were combined with the distribution of Weibull using the following model: Y = M (1 - exp (-(t/b)c)). The best performance was achieved with the temperature of 30ºC ( M, 95.29%). Time to achieve 60.23% of seed germination (0.6321 x 95.29%) was 99.35 h with a spread of 7.19. All model/data set combinations had close to linear.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cecropia pachystachya; Seed germination; Weibull function.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200010

Pelletization of seeds of Raphanus sativus L. cv. Redondo Gigante with graphite for germination under water stress conditions
Provedor de dados: 52
Autores: Freitas,Nobel Penteado; Takaki,Massanori.
The effect of water stress on germination of radish seeds is dependent on the presence of light. The effect of pelletization of radish seeds with powdered graphite on the tolerance to water stress under light was analysed. White light and far-red lights were filtered by graphite increasing slightly the tolerance of pelleted seeds to water stress of -0.77MPa. Although red light also inhibited seed germination the graphite had no effect. We propose the pelletization of seeds of Raphanus sativus, at least in cv redondo gigante with graphite as a pratice before planting to increase the tolerance to water stress.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pelletization; Raphanus sativus; Seed germination; Water stress.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000500016

Effect of biologically treated petroleum sludge on seed germination and seedling growth of Vigna unguiculata (L.) Walp. (Fabaceae)
Provedor de dados: 52
Autores: Sangeetha,Jeyabalan; Thangadurai,Devarajan.
The present investigation was carried out to study the response of different concentrations of treated petroleum sludge on seed germination, root and shoot length and tolerance of Vigna unguiculata (L.) Walp. The biologically treated petroleum sludge with bacterial consortium showed 54.8% reduction in total petroleum hydrocarbons. Treated sludge was utilized with agricultural soil in known concentration for the assessment of growth of V. unguiculata. A remarkable absence of seed germination was observed at higher sludge concentration. The different concentrations of treated petroleum sludge showed severe decline on the length, weight and vigour index of the tested seedlings with increasing sludge concentrations. The results showed that the difference in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial consortium; Biodegradation; Petroleum sludge; Seed germination; Total petroleum hydrocarbon; Vigna unguiculata.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000300017

Interaction of temperature and light on seed germination in Tecoma stans L. Juss. ex Kunth (Bignoniaceae)
Provedor de dados: 52
Autores: Socolowski,Fábio; Vieira,Daniela Cristine Mascia; Takaki,Massanori.
The effects of the temperature and light on the control of seeds germination in Tecoma stans was studied in the present work. The influence of constant temperatures from 10 to 45ºC, with 5ºC intervals, under the white light and darkness were tested. The optimum temperature for the germination of the seeds was between 25 and 30ºC, for both the light and the dark treatments. The maximal germination was reached in the range of 15 to 35ºC under the light and of 20 to 40ºC in the darkness. The seeds showed highest synchronization of the germination near the optimal temperature. The germination in the field was tested under the two light conditions. The highest percent of germination occurred under the direct sunlight (86.1%) than under the canopy (69%)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tecoma stans; Cardinal temperatures; Seed germination; Invasion potential.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400010

Seed germination in Miconia theaezans (Bonpl.) Cogniaux (Melastomataceae)
Provedor de dados: 52
Autores: Godoi,Simone; Takaki,Massanori.
The effects of light and temperature were studied on the seeds of Miconia theazeans by isothermic and alternating temperature incubations. The optimum temperature for seed germination was determined by final percentage and germination rates as located in the range of 27.5 to 30 °C and by germination kinetics at the range of 19.5 to 30 °C. The germination was dependent on diffusion processes. The minimum and maximum temperatures were 12.5-15°C and 32.5-35°C, respectively. The seeds showed strong light dependence for germination with the necessity of daily 4-6 h white light irradiation for the maximum induction of germination. However, under 30-20 °C alternating temperatures, daily 2 hours white light was enough to induce germination and attained maximum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Light; Seed germination; Temperature.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400002

Temperature Dependent Seed Germination of Dalbergia nigra Allem (Leguminosae)
Provedor de dados: 52
Autores: Ferraz-Grande,Fernanda G. A.; Takaki,Massanori.
The germination of endangered species Dalbergia nigra was studied and 30.5° C was found as optimum temperature, although the species presented a broad temperature range where germination occurs and light had no effect. The analysis of kinetics of seed germination confirmed the asynchronized germination below and above the optimum temperature. The light insensitive seed and germination also at high temperatures indicated that D. nigra could occur both in understories and gaps where the mean temperature was high.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dalbergia nigra; Endangered species; Seed germination; Temperature.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000400010

Bioremediation of dyes by fungi isolated from contaminated dye effluent sites for bio-usability
Provedor de dados: 58
Autores: Rani,Babita; Kumar,Vivek; Singh,Jagvijay; Bisht,Sandeep; Teotia,Priyanku; Sharma,Shivesh; Kela,Ritu.
Biodegradation and detoxification of dyes, Malachite green, Nigrosin and Basic fuchsin have been carried out using two fungal isolates Aspergillus niger, and Phanerochaete chrysosporium, isolated from dye effluent soil. Three methods were selected for biodegradation, viz. agar overlay and liquid media methods; stationary and shaking conditions at 25 °C. Aspergillus niger recorded maximum decolorization of the dye Basic fuchsin (81.85%) followed by Nigrosin (77.47%), Malachite green (72.77%) and dye mixture (33.08%) under shaking condition. Whereas, P. chrysosporium recorded decolorization to the maximum with the Nigrosin (90.15%) followed by Basic fuchsin (89.8%), Malachite green (83.25%) and mixture (78.4%). The selected fungal strains performed better...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioremediation; Dyes; Fungi; Microbial bioassay; Seed germination.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300039

Presence of the cytolytic protein enterolobin in different developmental stages of Enterolobium contortisiliquum seeds
Provedor de dados: 61
Autores: Lima,Consuelo M. R. de; Zanotta,Pedro J. P.; Ricart,Carlos A. O.; Sousa,Marcelo V. de.
Enterolobin is a 52.9 kDa, cytolytic, inflammatory and insecticidal protein present in Enterolobium contortisiliquum (Vell.) Morong, a Brazilian large-sized tree. This protein was previously described to occur in different forms of association (monomeric and oligomeric forms). In the current work, we investigated the presence of enterolobin forms of association and hemolytic activity in maturing, germinating and germinated seeds. Immunoblotting analysis revealed the presence of the monomeric form of enterolobin in all phases under study, whereas the dimer was detected in developing seeds in the second half of the maturation period, during germination and in the early post-germination phase. The trimeric form of enterolobin appeared one week after the dimer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defense proteins; Hemolytic proteins; Plant defense; Seed germination.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000200008

Propagation studies in Smilax fluminensis Steud. (Smilacaceae)
Provedor de dados: 65
Autores: Soares,Anielca Nascimento; Novembre,Ana Dionísia da Luz Coelho; Martins,Aline Redondo; Piedade,Sônia Maria de Stefano; Appezzato-da-Glória,Beatriz.
Smilax L. species, popularly known in Brazil as salsaparrilha, have been used in folk medicine as tonic against rheumatism and as anti-syphilitic since the sixteenth century; however, until today, their roots have been explored in an extractive way. The aim of this study was to analyze the propagation of Smilax fluminensis aiming to meet the demand and to propose procedures for its sustainable management. It was analyzed the percentage of seed germination, rooting of aerial and subterranean stem cuttings and plant resprouting capacity after removal of the shoots. The monitoring lasted one year. Seeds were subjected to temperatures: 25°C, 30°C, 20-30°C and 20-35°C under a daily photoperiod of eight hours and in the absence of light. For rooting the stem...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cuttings; Greenbrier; Resprouting; Seed germination.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011001000014

Phosphate fertilization on production and quality of cauliflower seeds
Provedor de dados: 65
Autores: Cardoso,Antonio Ismael Inácio; Claudio,Marina de Toledo Rodrigues; Magro,Felipe Oliveira; Freitas,Pâmela Gomes Nakada.
ABSTRACT: Due to the scarcity of information related to the effect of fertilizers on production and quality of vegetable seeds, mainly on species which present an increase in the cycle, like cauliflower, more studies are necessary about the influence of nutrients rates which provide high production of high-quality seeds. This research aimed to evaluate the influence of rates of phosphorus (P) on the production and quality of cauliflower seeds. Five rates of phosphorus were studied (0, 300, 600, 900 and 1200kg ha-1 of P2O5), in a randomized complete block design, with four replications. Production and quality (weight of a thousand seeds, germination test, first count of germination test and emergence in substrate) of the seeds and soil chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica oleracea; Seed germination; Soil chemical characteristics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000801337