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Sensitivity of brazilian-pine (Araucária angustifolia) embryos to desiccation and temperature PFB - Pesquisa Florestal Brasileira
Medeiros, Antonio Carlos de Souza; Walters, Cristina; Hill, Lisa.
The “recalcitrant” behavior of Araucaria angustifolia (Bert.) O. Kuntze seeds (Brazilian pine) limits the conservation of genetic resources of this important species in ex situ genebanks. As initial steps in developing storage protocols, we studied the interaction of water content and temperature on embryo survival. Embryos were excised from seeds and “flash-dried” to water contents as low as 0.29 g water/g dry mass and then exposed to 0°C, -5°C and -18°C for 4 h. Drying rate was calculated from drying time courses and expressed as (g water / g dry weight) / hour. Other authors have studied the effects of desiccation of whole seed of A. angustifolia on viability. In order to compare moisture content of whole seeds to that of embryonic axes, seeds of A....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Seeds; Germplasm; Brazilian pine; Desiccation; Genetic conservation Sementes; Germoplasma; Secagem; Conservação.
Ano: 2004 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1603
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