水杨酸介导植物抗病的研究进展

Recent advance of salicylic acid signaling in plant disease resistance

水杨酸(salicylic acid,SA)是一种在植物免疫反应中起着重要作用的信号分子,植物受到活体营养型病原侵染后,体内SA合成急剧增加,这是激活植物对病原产生抗性反应所必不可少的细胞信号响应,因此SA又被称为植物抗病激素。研究表明植物体内具有多种与SA作用或结合的蛋白,其中NPR1(nonexpressor of pathogenesis-related genes 1)、NPR3和NPR4在SA介导的信号感受和传导过程中起着关键的调控作用。本文围绕SA在植物抗病反应中的作用;SA的生物合成及其调控;以及植物细胞利用SA结合蛋白(SA-binding-proteins,SABPs),如NPR1、NPR3和NPR4等,感受SA并调节抗病信号传导途径等进行简单的介绍,并对其研究前景进行展望。

Salicylic acid（SA） plays a central role in plant innate immunity.Endogenous SA level increases drastically shortly after plants detect the attack of biotrophic pathogens,and plays an essential role in activating plant defenses.Hence it has also been accepted as a defense hormone in plants.Studies have revealed multiple SA-interacting/binding proteins,among which NPR1,together with NPR3 and NPR4 plays a master role in sense and conducting the SA-mediated signals during the establishment of plant defense responses.This review focuses on the role of SA in plant disease resistance,and gives an outline of how SA is synthesized and regulated,how it is perceived by SA interaction/binding proteins involving the actions of the NPR1,3 and 4 as well as the subsequent signal transduction.Perspective on future research is also suggested on this topic.