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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) is a signaling molecule that plays an important role in the plant immune response. After the plant is inoculated with the live-nutrient pathogen, the synthesis of SA in the body increases sharply, which is to activate the plant to produce resistance to the pathogen The response of the cell is essential for the signal response, so SA is also known as a plant anti-infective hormone. Studies have shown that plants have a variety of SA-binding or interacting proteins. NPR1 (nonexpressor of pathogenesis-related genes 1), NPR3 and NPR4 play key roles in SA-mediated signal transduction and transduction. In this paper, the role of SA in the plant disease resistance response, the biosynthesis and regulation of SA, and SA-binding-proteins (SAABs) such as NPR1, NPR3 and NPR4, Signal transduction pathways such as a brief introduction, and prospects for its research.