990 resultados para Quebra de dormência


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Embalagem para armazenamento e transporte de ovos compreendida por bandejas (1) apropriadas e submetidas à condição de vácuo parcial por meio de sacolas plásticas (5) com saches (2) sequestrantes de gás oxigênio, de maneira que a bandeja (1) permite, por meio de colunas (3) centrais, meios de sustentação para o empilhamento sem quebra de ovos (4), sendo ditas embalagens (1) recobertas por sacolas plásticas (5), sendo os saches sequestrantes (2) de 02 compostos com pó a base de óxido de ferro e silicato de alumínio com microporos adsorventes, de modo que a quantidade de saches é determinada em função do tempo de armazenagem e da quantidade de ovos embalados em uma unidade.

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Annonaceae seeds are known by presenting dormancy mechanisms, whose reports ranging from coating impermeable to the physiological dormancy. By this way, the present study aimed to evaluate water uptake in Annona diversifolia Saff and Annona purpurea Moc & Sessé ex Dunal seeds. For this study, seeds were placed under immersion in distilled water, and used four replicates of 25 seeds of each species, which were weighed during the 480 hours that were immersed. To determine the place of purchase of water, Annona diversifolia seeds were sealed with paraffin at different locations. Based on the results, seeds from both species reached the phases I and II of water uptake, which indicates they are not hard; however, germination (Phase III) was not reached. Annona diversifolia seeds completed Phase I with, 50h and Annona purpurea with 70h from imbibitions begin, which shows that even slowly, water is acquire.

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Populations of carrot seeds with superior physiological quality and storage potential are of interest to seed companies and growers. Thus, we verified the efficiency of some tests for the selection of carrot populations with greater vigor and longevity of seeds. Seeds of 50 carrots progenies of different half-brothers from Brasilia cultivar were evaluated for the mass of one hundred seeds, the first count, germination, dormancy, accelerated aging with water and saturated NaCl solution. The seeds were stored at moisture contents of 6.1±0.3% in hermetic packaging at temperatures of 15 and 25°C for 12 months and germination was evaluated quarterly. The experimental data were evaluated for variance and phenotypic, genotypic and environmental heritability, coefficient of variation and genetic gain from selection. Selection based on the mass should not be used because it would increase the occurrence of dormancy in seeds of the next generation. The test of the first count, germination and accelerated aging in water or saline solution saturated may be used to select populations of carrot seeds of higher vigor and longevity. The estimated gain genetic selection for germination after 12 months storage at 25°C was 14%.

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Pós-graduação em Engenharia Elétrica - FEIS

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Pós-graduação em Serviço Social - FCHS

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Ciência dos Materiais - FEIS