ROLE OF ETHYLENE IN THE SENESCENCE OF DETACHED RICE LEAVES
ROLE OF ETHYLENE IN THE SENESCENCE OF DETACHED RICE LEAVES
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DOI：
10.1104/pp.73.4.881
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发表时间：
1983-01-01
期刊：
影响因子：
7.4
通讯作者：
YANG, SF
中科院分区：
文献类型：
--
作者：
KAO, CH;YANG, SF
研究了乙烯在水稻离体叶衰老中的作用及其与1-氨基环丙烷-1-羧酸(ACC)含量和乙烯产生的关系。在新鲜切开的水稻叶片中，ACC水平和乙烯产生速率都很低。培养后，乙烯产生速率增加，在12h达到最大值，随后下降。乙烯产量的增加与ACC水平增加20-30倍有关。乙烯似乎参与了水稻离体叶衰老的调节。这一结论是基于最大乙烯产生先于叶绿素降解的观察结果，ACC促进了叶绿素的降解，乙烯产生的抑制剂和乙烯作用抑制了叶绿素的降解，光、环己亚胺、α-联吡啶、Ni2+和低温等延缓叶绿素降解的各种处理也抑制了乙烯的产生。脱落酸促进衰老，但显著降低乙烯产生；苯基腺嘌呤延缓衰老，但促进乙烯产生。脱落酸处理增加了组织对乙烯的敏感性，而苄基腺嘌呤处理降低了组织对乙烯的敏感性。
The role of ethylene in the senescence of detached rice leaves in relation to their changes in 1-aminocyclopropane-1-carboxylic acid (ACC) content and ethylene production was studied. In freshly excised rice leaf segments, ACC level and ethylene production rates were very low. Following incubation, the rates of ethylene production increased and reached a maximum in 12 h and subsequently declined. The rise of ethylene production was associated with a 20- to 30-fold increase in ACC level. Ethylene seems to be involved in the regulation of the senescence of detached rice leaves. This conclusion was based on the observations that maximum ethylene production preceded chlorophyll degradation, ACC application promoted chlorophyll degradation, inhibitors of ethylene production and ethylene action retarded chlorophyll degradation, and various treatments such as light, cycloheximide, .alpha.,.alpha.-dipyridyl, Ni2+ and cold temperature, which retarded chlorophyll degradation, also inhibited ethylene production. Abscisic acid promoted senescence but significantly decreased ethylene production; benzyladenine retarded senescence but promoted ethylene production. Abscisic acid treatment increased the tissue sensitivity to ethylene: benzyladenine treatment decreased it.