白叶枯病菌(Xanthomonas oryzae pv. oryzae)与水稻抗病基因识别的分子机理  

Molecular Mechanisms of Rice Resistance Genes Recognized by Xanthomonas oryzae pv. oryzae

作　　者：张帆[1] 周永力[1] 

机构地区：[1]中国农业科学院作物科学研究所/农作物基因资源与基因改良重大科学工程,北京100081

出　　处：《中国水稻科学》2013年第3期305-311,共7页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目(3116114349;U1201211)

摘　　要：水稻白叶枯病是全球稻作栽培中毁灭性细菌病害,水稻与白叶枯病菌(Xanthomonas oryzae pv.oryzae,Xoo)是研究寄主-病原菌互作的模式系统之一。水稻对Xoo的抗病反应包括两个层次:一是病原相关分子模式诱导的植物免疫反应(effector-trigged immunity,ETI),即传统的"基因对基因"抗性;二是效应蛋白诱导的免疫反应(pathogen-associated molecularpatterns triggered immunity,PTI),即基础防御反应。近年的研究结果表明ETI由TAL(transcriptional activator-like效应蛋白)调控,而PTI由硫化的Ax21与抗病基因Xa21识别诱导。本文介绍了水稻与Xoo识别分子机制的研究进展,同时探讨了PTI和ETI在水稻抗白叶枯病育种中的应用前景。Rice bacterial blight, caused by Xanthomonas oryzae pv. oryzae（Xoo）, is a destructive disease in rice growing regions over the world. Xoorice pathosystem is considered as an ideal model to reveal how the pathogen surpasses rice defense that leads to rice resistance or susceptibility. Rice immunity to Xoo infection is thought to consist of two layers. One is taken as effectortrigged immunity （ETI） that is formally defined as “geneforgene” resistance. The other is termed as pathogenassociated molecular patterns triggered immunity （PTI） that is referred to basic defense reaction. Recent evidences demonstrate that ETI is manipulated by TAL （transcriptional activatorlike） effectors and PTI is charged both by Xoo AX21 and rice Xa21. Here we reviewed recognition mechanisms of rice resistance （R） genes by TAL effector and by a PAMP AX21, and also discussed about possibilities in applications of these ETI and PTI in rice resistance breeding to bacterial blight.

关 键 词：水稻白叶枯病 TAL效应子 病原相关分子模式 PTI ETI 分子识别 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]