摘要
Ｆｅ２＋ 可诱发水稻（Ｏｒｙｚａ ｓａｔｉｖａ Ｌ．）谷粒颖壳中释放大量乙烯，诱导反应是一个非酶促的化学过程。可能在谷粒颖壳中存在一种非气态的乙烯前体，在Ｆｅ２＋ 的作用下可转化为气态乙烯。Ｆｅ２＋ 促进水稻幼苗的生长可能是通过其诱导乙烯所引起的。因为Ｆｅ２＋ 诱发颖壳中的乙烯释放和它促进幼苗生长在时间上正好同步，当第一次处理后再更新Ｆｅ２＋ 溶液时，不再能诱发乙烯释放，也不再促进幼苗生长；Ｆｅ２＋ 不能刺激萌发糙米的乙烯产生。
Ferrous iron might induce ethylene production from rice(Oryza sativa L.) husk. The induction was a non enzymic chemical process, in which probably a non gaseous precursor could be converted to ethylene by the action of Fe 2+ . Fe 2+ stimulated seedling growth was probably mediated by the induced ethylene based on the following evidences: (Ⅰ) The induction and the stimulation were synchronous in time within one day only. Once seedling growth was initiated renewal of Fe 2+ solution,even on the following day,exerted no more effect neither on ethylene production nor on seedling growth; (Ⅱ) Ferrous iron was neither capable to stimulate the ethylene production of rice caryopsis,nor able to stimulate the seedling growth of germinated caryopsis.
关键词
水稻
颖壳
乙烯
铁离子
幼苗
生长
Ferrous iron
Rice husk
Ethylene
Coleoptile
Rice
