水杨酸是植物体内普遍存在的内源信号分子之一，已被确认为是一种植物激素，对植物具有重要的生理功能，如在植物的抗病、抗低温、抗旱、抗盐和抗紫外线等抗逆性方面和果实成熟、园艺产品保鲜等方面。本文就近年来水杨酸对植物表现出的各类生理作用的研究进展进行了综述

Salicylic acid is one of the ubiquitously endogenous signal molecules in plant, which has been recognized as a kind of hormones, and has great physiological function such as disease resistance, low temperature resistance, drought resistance, salt resistance, ultraviolet radiation resistance, fruit maturity, gardening product preservation and so on. This article summarized the recent research progress of salicylic acid (SA)’s physiological effects on plants.