水杨酸与植物抗热性研究进展

从水杨酸与活性氧、抗氧化系统、热激蛋白、光合作用、脱落酸和钙离子的关系方面综述了水杨酸与植物抗热性的最新研究进展。研究发现一定浓度的水杨酸能减少植物体内H2O2的含量,且外源SA可提高植物体内POD活性,但对CAT和POD的活性的影响尚有争议。外施SA和高温锻炼可能有相似的提高抗热机制,SA可能诱导热激蛋白的合成。适当浓度的SA能够保持叶片较高的光合速率。SA和ABA都是响应高温锻炼的重要信号分子,SA对抗病信号的传导可能通过钙信使系统。最后就SA在植物抗热性方面提出了进一步的展望。

Research Advance on Salicylic Acid and Heat Stress Resistance in Plants

This article gave an review of the recent research progresses on salicylic acid and heat stress resistance in plants,which aimed mainly at the relationship between salicylic acid and active oxygen,antioxident systerm,heat shock protein,photosynthesis,abscisic acid,calcium ion.The contents of H2O2 in plants could be reduced by a certain concentration of exogenous salicylic acid.Exogenous salicylic acid can improve the activity of superoxide dismutase,but there was still a debate on its influence on the activities of peroxidase and catalase.The exogenous salicylic acid and heat acclimation may show common mechanism of inducing thermotolerance,and the salicylic acid may introduce the heat shock protein.A proper concentration of salicylic acid could increase the photosynthesis ability of plant leaves.Salicylic acid and abscisic acid(ABA) were both the important signal molecule to heat acclimation.Salicylic acid might conduct the disease resistance signal through the calcium messenger system.Further research ideas for this aspect were suggested at the end of the paper.