植物抗性信号分子——水杨酸研究进展

植物在与病原物长期相互作用、共同进化过程中产生一系列防卫体系，从而有效地抑制病原物对自身的侵害。当植物受到病原物侵染时，侵染部位通常会在几小时内形成局部细胞死亡，限制病原物的增殖与扩散,称为过敏反应(Hyper sensitive Response, HR)。过敏反应几天或1周后整株植株会对其他病原物产生抗性,称为系统获得性抗性(Systemic Acquired Resistance, SAR)。SAR强调受侵染后植株获得整体抗性的能力,大量研究结果认为SAR是普遍存在的，并具有广谱性。许多研究证实，SA是SAR的重要诱导因子，也是植物受病原菌侵染后活化一系列防卫反应的信号传导途径中的重要组成成分。较为详细论述了SA在诱导植物产生抗病性过程中的作用及其研究进展，另外还对SA在其他抗性方面的作用做了简单的叙述。

The Recent Advances of Salicylic Acid as Signal Molecules of Resistance in Plant

In the course of long-termed mutual effect and co-evaluation with pathogen,plants bring about a series of defensive systems,so as to effectively avoid being infected by pathogen.When being infected,local cells in the infectious part usually die in several hours,which restrict pathogen from propagating or spreading.The above phenomenon is called Hypersensitive Response,HR.The resistance that the whole plant works several days or one week after producing HR and that aims at other pathogens is called Systemic Acquired Resistance,SAR.SAR emphasizes on plant's ability to acquire integrated resistance.According to lots of research,SAR is ubiquitous and universal.Many studies confirm that,SA is an important induced factor of SAR,and is an important part of the signal conduction path by which plants activate a series of defensive feedback after it is infected by pathogen.In this paper,the author elaborated on the effect of SA exerted when inducing plants to produce resistance and the study progress of it.In addition,the effects of SA in other respects referring to resistances were also introduced briefly in this paper.