INJURY TO RICE PLANTS CAUSED BY COMPLETE SUBMERGENCE - A CONTRIBUTION BY ETHYLENE (ETHENE)
INJURY TO RICE PLANTS CAUSED BY COMPLETE SUBMERGENCE - A CONTRIBUTION BY ETHYLENE (ETHENE)
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完全浸没对水稻植株造成的伤害 - 乙烯（乙烯）的作用
DOI：
10.1093/jxb/38.11.1826
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发表时间：
1987-11-01
影响因子：
6.9
通讯作者：
GREENWAY, H
中科院分区：
文献类型：
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作者：
JACKSON, MB;WATERS, I;GREENWAY, H
水稻（Oryza sativa L.）CV. IR 42）处理3-6 d，基本停止了干物质的积累，可溶性糖含量降低75%以上，并促进了完全展开叶片的失绿。鲜重的增加，由芽没有受损。最年轻的可见叶刺激了延伸。延伸到下一个左边出现的是被淹没的延迟。这些生长反应淹没与1-5倍增加的内源乙烯（乙烯）的分压。将乙烯（0.3-0.35 Pa）在气相中施加到非淹没植物上，再现了一些，但不是全部，这些淹没效应。因此，沉水植物更大的叶片伸展和褪绿可能归因于乙烯的积累，但相对生长速率缓慢和淹没开始后出现的叶片伸展减少都不能归因于乙烯的积累。两个品种（“FR 13 A”和“Kurkaruppan”）已经知道耐淹，不同的是，从耐淹的“IR 42”在其相对生长速度和可溶性碳水化合物浓度在淹没。然而，它们的水下叶片延伸小于“IR 42”，并且失绿症的发生率要低得多，尤其是“FR 13 A”。同样，乙烯供应给非淹没植物是一个不太有效的促进剂的叶片延伸和黄化在两个耐淹品种。在气相中施加1-0 kPa的二氧化碳防止乙烯引起的黄化反应。结果表明，积累的乙烯是一个可能的原因，快速叶片伸展和失绿的耐淹水稻的形式，特别是当溶解的二氧化碳量是最小的。
Complete submergence of rice plants (Oryza sativa L. cv. ''IR42) in dilute nutrient solution for 3-6 d almost stopped the accumulation of dry matter, depressed soluble carbohydrate concentration by over 75% and promoted chlorosis in fully expanded leaves. Increase in fresh weight by the shoots was not impaired. Extension by the youngest visible leaf was stimulated. Extension by the next left to appear was retarded by submergence. These growth responses to submergence was associated with a 1-5-fold increase in the partial pressure of endogenous ethylene (ethene). Applying ethylene (0.3-0.35 Pa) in the gas-phase to non-submerged plants reproduced some, but not all, of these effects of submergence. Thus, greater leaf extension and chlorosis of submerged plants could be attributable to accumulated ethylene but neither the slow relative growth rate nor the decreased extension of leaves emerging after the start of submergence could be so attributed. Two cultivars (''FR13A'' and ''Kurkaruppan'') already known to tolerate submergence, differed little from submergence-intolerant ''IR42'' in their relative growth rate and soluble carbohydrate concentration during submergence. However, their underwater leaf extension was less than in ''IR42'' and chlorosis was much less prevalent, especially in ''FR13A''. Similarly, ethylene supplied to non-submerged plants was a less effective promotor of leaf extension and chlorosis in the two submergence tolerant cultivars. Application of 1-0 kPa carbon dioxide in the gas-phase prevented the chlorosis response to ethylene. The results indicate that accumulated ethylene is a likely cause of fast leaf extension and chlorosis in submergence intolerant forms of rice, particularly when amounts of dissolved carbon dioxide are minimal.