GERMINAÇÃO E REINDUÇÃO DA TOLERÂNCIA À DESSECAÇÃO EM SEMENTES DESenna multijuga(RICH.) IRWIN ET BARN

Ciencia Florestal

关键词: luz;    dormência tegumentar;    canafístula;   

DOI  :  10.5902/1980509825031

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

The aims of this study were to verify the effects of different tests in the overcoming dormancy, excellent germination terms, as light and temperature, and the possibility of re-induction of desiccation tolerance in Senna multijuga seeds. We evaluated two tests for overcoming dormancy: immersion in water with an initial temperature of 100ºC (hot water) and immersion in water at a constant temperature at 100ºC for 20 seconds (boiling water), both treatments followed by rest out of the heating for 24 hours. For the germination test, we evaluated 25ºC, 30ºC (constant) and 20-30ºC (alternate), in the presence and absence of light. For the re-induction of desiccation tolerance, we selected seeds germinated with 1, 2, 3 and 4mm of radicle length. We submitted the germinated seeds to the follow treatments: no incubation, incubation in polyethylene  glycolphotoblastic required, but in light conditions the germination was higher. We observed the resumption of the radicle growth in germinated seeds of up to 3mm length.

【 授权许可】

CC BY-NC