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Registros recuperados: 62 | |
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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<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 |
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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 |
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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 |
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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 |
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Resende,Osvaldo; Almeida,Dieimisson Paulo; Costa,Lílian Moreira; Mendes,Udenys Cabral; Sales,Juliana de Fátima. |
This study analyzed the drying process and the seed quality of adzuki beans (Vigna angularis). Grains of adzuki beans, with moisture content of 1.14 (decimal dry basis) at harvest and dried until the moisture content of 0.11 (decimal dry basis.) were used. Drying was done in an experimental drier maintened at controlled temperatures of 30, 40, 50, 60, and 70 ºC and relative humidity of 52.0, 28.0, 19.1, 13.1, and 6.8%, respectively. Physiological and technological seed quality was evaluated using the germination test, Index of Germination Velocity (IGV), electrical conductivity, and water absorption, respectively. Under the conditions tested in the present study, it can be concluded that drying time for adzuki beans decreases with the higher air... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiological quality; Drying conditions; Technological quality; Seed drying. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000100022 |
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TORRES, S. B.. |
Com o objetivo de estudar a eficiencia do teste de estresse hidrico na avaliacao da qualidade fisiologica de sementes de tomate industrial (Lycopersicon esculentum Mill), cinco lotes da cultivar IPA-5 foram analisados pelos testes de germinacao, primeira contagem, de frio sem solo, envelhecimento acelerado, condutividade eletrica, emergencia em campo e comprimento das plantulas sob estresse hidrico nos potenciais de 0, -0,2, -0,4 e -0,6 MPa. Os trabalhos foram realizados no laboratorio de analise de sementes e no campo experimental do CPATSA, em Petrolina, PE. As determinacoes foram conduzidas com quatro repeticoes, em delineamento experimental inteiramente casualizado. Os resultados indicam que o teste de germinacao sob estresse hidrico de -0,4 MPa pode... |
Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Lycopersicon esculentum; Polietileno glicol; Teste de vigor; Semente; Qualidade fisiologica; Poliethylene glycol; Vigor test; Seeds; Physiological quality. |
Ano: 1998 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/86522 |
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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 |
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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 |
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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 |
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COELHO, S. V. B.; ROSA, S. D. V. F. da; FANTAZZINI, T. B.; BAUTE, J. L.; SILVA, L. C.. |
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 and -5... |
Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Drying in silica gel; Ice crystals; Isoenzymes; Physiological quality; Secagem em sílica gel; Semente recalcitrante; Cristal de gelo; Qualidade fisiológica; Secagem; Isoenzima; Recalcitrant seeds. |
Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1108759 |
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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 |
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SANTOS, F. C.; ROSA, S. D. V. F. da; VON PINHO, E. V. de R.; CIRILLO, M. A.; CLEMENTE, A. da C. S.. |
Maturity stage and drying method are the factors that most influence coffee seed quality. The objective of this study was to assess the physiological quality and investigate the electrophoretic patterns of catalase and endo-ß-mannanaseenzymes and heat resistant proteins in coffee seeds harvested at different phenological stages and dried under different conditions. Physiological quality was assessed when the seeds had developed the green, greenish-yellow, cherry, overripe and dry stages after three treatments: no drying, conventional drying and fast drying. After each treatment, the physiological quality of the seeds was assessed using the germination test and electrophoretic patterns of heat resistant proteins and the activity of catalase and... |
Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Seed drying; Physiological quality; Protein profile; Qualidade fisiológica; Pefil proteico; Coffea arabica; Secagem; Coffea arabica. |
Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/1039773 |
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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 |
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Registros recuperados: 62 | |
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