乙烯促进老化种子的发芽率。
Enhancement of germination rate of aged seeds by ethylene.
机构信息
Department of Vegetable Crops, University of California, Davis, California 95616.
出版信息
Plant Physiol. 1971 Apr;47(4):521-4. doi: 10.1104/pp.47.4.521.
Abstract
Naturally and artificially aged seeds of rape, Brassica napus L., produced less ethylene than freshly harvested seed during the early stage of germination. With freshly harvested seeds one peak of ethylene production was observed during germination, which coincided with the emergence and elongation of root and cotyledon, accompanied by splitting of the seed coat. Application of exogenous ethylene was effective in accelerating germination in aged seeds but did not significantly improve the percentage of germination. Ethylene as a hormone was considered to serve as a stimulator of germination and growth. One of the factors causing seed aging might be the degeneration of an ethylene-producing system in the seed. Exogenous ethylene may be effective only for the seeds in which the ethylene-producing system is weakened but the following responding systems are still functional.
摘要
自然老化和人工老化的油菜（ Brassica napus L. ）种子在发芽的早期阶段产生的乙烯比新鲜收获的种子少。对于新鲜收获的种子，在发芽过程中观察到一个乙烯产生的高峰，这与根和子叶的出现和伸长同时发生，伴随着种皮的分裂。外源乙烯的应用有效地加速了老化种子的发芽，但对发芽率的提高没有显著效果。乙烯作为一种激素，被认为是促进发芽和生长的刺激物。导致种子老化的因素之一可能是种子中乙烯产生系统的退化。外源乙烯可能仅对乙烯产生系统减弱但后续反应系统仍正常的种子有效。
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