植物系统性获得抗性及其信号转导途径  

Systemic Acquired Resistance and Signal Transduction in Plant

作　　者：赵淑清[1] 郭剑波[1] 

机构地区：[1]山西大学生物工程实验室,太原030006

出　　处：《中国农业科学》2003年第7期781-787,共7页Scientia Agricultura Sinica

基　　金：国家自然科学基金资助项目 (30 0 0 0 112 );山西省青年科技研究基金资助项目 (2 0 0 0 10 37);山西省教育厅高校科技研究开发基金资助项目 (2 0 0 5 )

摘　　要：植物系统获得抗性 (SAR) ,是植物受到病原菌侵染后所激发的一种防卫反应。这种反应由植物抗病基因 (R)与病原菌无毒基因 (avr)的相互识别开始 ,由R基因下游的一些基因整合不同的抗病信号 ,通过水杨酸 (SA)将抗病信号传递下去。这一信号途径在SA下游受非诱导免疫 (NIM/NPR)基因的调控 ,激活NPR1可诱导病程相关蛋白 (PR)基因的表达 ,最终建立具有广谱抗性的SAR。SAR信号途径也可由模拟自然信号的化学物质激活 ,这些激活剂的应用是发展绿色化学农药的新思路。Systemic acquired resistance (SAR), known as broad-spectrum, inducible plant immunity, is a defense response triggered by pathogen infection. The response begins with the recognition of plant resistance (R) with the corresponding avirulence (avr) gene from the pathogen. There are some genes for convergence of signals downstream of different R/avr interacting partners into a single signaling pathway. Salicylic acid (SA) is required for the induction of SAR and involved in transducing the signal in target tissues. The SA signal is transduced through NPR1, a nuclear-localized protein that interacts with transcription factors that are involved in regulating SA-mediated gene expression. Some chemicals that mimic natural signaling compounds can also activate SAR. The application of biochemical activators to agriculture for plant protection is a novel idea for developing green chemical pesticide.

关 键 词：植物 系统性 抗性 信号转导途径 水杨酸 广谱抗病性 激活剂 病原菌侵染 防卫反应 

分 类 号：S432[农业科学—植物病理学]