作物学报2011，Vol.37Issue(6)：935-942,8.DOI:10.3724/SP.J.1006.2011.00935
植物天然免疫性研究进展及其对作物抗病育种的可能影响
Recent Findings in Plant Innate Immunity and Possible Impacts on Crop Disease-resistance Breeding
摘要
Abstract
Plants have been successfully living in such an environment in which there are myriads of potential microbial pathogens, indicating that plants possess an efficient immunity system.Recent studies have revealed that the plant immunity system consists of two layers of defense.The first layer, based on the sensitive perception of pathogen-associated molecular patterns (PAMPs) through pattern recognition receptors (PRRs) at the plant cell surface, is named as PAMP-triggered immunity (PTT).The second is called effector-triggered immunity (ETI), in which plants use additional receptors (such as R-gene products) to perceive pathogen virulence effectors that have evolved to suppress PTI.The conventional gene-for-gene resistance in plants belongs actually to ETI.For millions of years, natural selection has been driving pathogens to avoid ETI either by diversifying the recognized effectors or by acquiring additional effectors that suppress ETI.On the other hand, natural selection favors plant new R-genes that can recognize the newly acquired effectors in pathogen, resulting in new ETI to be triggered again.The latest studies have revealed the simple cipher that governs DNA recognition by TAL (transcription activator-like) effectors from plant pathogenic Xanthomonas.TAL effectors can specifically bind the target DNA of host plant with a novel protein-DNA binding pattern in which two amino acids recognize one nucleotide.Using this recognition code, TAL effectors can bind the promoter of target genes and induce the host diseases or resistance responses.Recent findings about plant innate immunity are reviewed in this paper and their possible applications in plant breeding for disease resistance are discussed.关键词
植物天然免疫/TAL效应子/植物-病原菌相互作用/分子识别密码/抗病育种Key words
Plant innate immunity/ TAL-effectors/ Plant-pathogen interaction/ Recognition code/ Plant breeding for disease resistance引用本文复制引用
赵开军,李岩强,王春连,高英..植物天然免疫性研究进展及其对作物抗病育种的可能影响[J].作物学报,2011,37(6):935-942,8.基金项目
本研究由国家转基因生物新品种培育科技重大专项(2011ZX08001-002)资助. （2011ZX08001-002）
