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.