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作 者 ：王利军 黄卫东

期 刊 ：植物学通报 2000年 17卷 02期 页码：114-120

关键词：高温胁迫；信号转导；脱落酸；Ca2+；水杨酸；茉莉酸；

摘 要 ：高温是影响当前农业生产重要的不利环境因素之一。本文综述了4种信号分子脱落酸(ABA)，Ca2+，水杨酸(SA)，茉莉酸(JA)对高温胁迫的响应以及它们的相互关系，高温胁迫能够诱导ABA，Ca2+，SA的含量升高，并且通过外施ABA，Ca2+，SA，JA都能提高植物的抗热性。作为胞内第二信使，外源Ca2+能够提高植物超氧化物歧化酶(SOD)，过氧化氢酶(CAT)以及抗坏血酸氧化酶(APX)的活性，且能提高钙调蛋白水平。ABA诱导的抗热性受胞质游离的Ca2+介导。SA被认为是对胁迫反应所必需的信号分子，H2O2很可能是信号转导链的一部分。JA和ABA在生理功能上有很多相似之处，JA独自或通过提高ABA含量来起作用，JA和SA有不同的生理功能，也有相同的(不过它们的信号转导途径可能不同)，最后，提出了今后高温胁迫信号转导研究的一些思路。

Abstract:Heat stress is an important factor which influences agriculture. Responses of ABA, Ca2+, salicylic acid(SA) and jasmonic acid(JA ) to heat stress and their relations are reviewed. Heat stress increases the content of ABA, Ca2+, SA in plants; moreover, external applied ABA, Ca2+, SA and JA enhance thermtolerance. Ca2+ enhances the activities of SOD, CAT, APX and level of calmodulin as a second message. ABA induced the thermtolerance of plant mediated by Ca2+ in cytoplasm. SA is considered to be a message molecule to stress. H2O2 is probably a part of the signal cascade of SA that induces thermtolerance. JA excutes its function by itself or by increasing ABA. JA and SA have common or contrast physiological functions, but their signal transduction pathways differ. Further research ideas for signal transduction of heat stress are suggested.

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