Emission of water stress ethylene in wheat (Triticum aestivum L) ears: Effects of rewatering
Emission of water stress ethylene in wheat (Triticum aestivum L) ears: Effects of rewatering
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DOI：
10.1023/a:1005717820782
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发表时间：
1997-02-01
影响因子：
4.2
通讯作者：
Carbone, A
中科院分区：
文献类型：
--
作者：
Beltrano, J;Montaldi, E;Carbone, A
在这项工作中发现，在中度或严重水分胁迫条件下，乙烯产量仅略有增加。然而，在充分膨压脱水后的植物的再水化引起乙烯的高排放。脱水不会不可逆地破坏乙烯途径的酶，因为再水合使合成几乎立即重新开始。水分亏缺也增加了自由基水平和抗氧化剂清除剂，如超氧化物歧化酶。自由基促进1-氨基-环丙烷-1-羧酸转化为乙烯，那么认为这两种化学物质都参与了植物崩溃前谷物成熟加速的现象是合乎逻辑的。
In this work it has been found that ethylene production increased only slightly under conditions of a moderate or severe water stress. However, the rehydration of the plants at full turgor after desiccation caused a high emission of ethylene. The desiccation would not irreversibly inactivate the enzymes of the ethylene pathway, since rehydration made the synthesis recommence almost immediately. Water deficit also increased the free radical levels and the antioxidant scavengers, such as superoxide dismutase. Free radicals promote the conversion of 1-amino-cyclopropane-1-carboxylic acid to ethylene, then it is logical to think that both chemical species are involved in the phenomenon of the acceleration of the grain maturity before the plant collapses.