豆科植物-根瘤菌共生固氮的免疫调控机制

doi:10.13560/j.cnki.biotech.bull.1985.2019-0716

摘要/Abstract

摘要： 在长期进化中,根瘤菌与豆科植物形成一种独特的互惠共生关系——共生固氮。根瘤菌-豆科植物共生互作与病原细菌激发植物病原反应极为相似,然而根瘤菌的入侵和定殖并没有激发宿主豆科植物过度的防御反应,植物也进化出特殊的共生信号转导和根瘤发育途径来“邀请”根瘤菌的入侵和定殖。此外,植物防御反应也很大程度上调控根瘤菌与豆科植物共生的宿主特异性。越来越多的研究表明,植物防御反应在调控根瘤菌匹配识别、入侵、定殖以及类菌体发育等方面起关键调控作用。从植物免疫反应角度综述了根瘤菌与豆科植物共生互作的最新进展,通过与病原菌-植物互作的病原反应对比,论述了根瘤中根瘤菌感知微生物相关分子模式（MAMP,Microbe-Associated Molecular Patterns）和效应蛋白引起的免疫反应的调控机制。

关键词: 植物的免疫反应, 共生, 豆科植物, 根瘤菌

Abstract: In the long-term evolution,rhizobia and legume have formed a specific mutualistic relationship：symbiotic nitrogen fixation. Rhizobia and legume interact in a very similar way as that pathogens stimulate plant pathogen response. However,rhizobial invasion and colonization do not activate the excessive defense response in their host plants,and plants also have evolved special symbiotic signal transduction and nodule development pathways to “invite” rhizobia. In addition,plant innate immunity regulates the host specificity of rhizobia to legumes. Recent studies have shown that plant defense response plays a key role in the regulation of rhizobia recognition,invasion,colonization and bacteroid development. We review the recent progress of symbiotic interaction between rhizobia and legume from the perspective of plant immune response,and discuss the regulatory mechanism of immune response induced by rhizobial MAMP and effectors through comparing interaction between pathogen and plant.

Key words: plant innate immunity, symbiosis, legumes, rhizobia

董汝, 曹扬荣. 豆科植物-根瘤菌共生固氮的免疫调控机制[J]. 生物技术通报, 2019, 35(10): 25-33.

DONG Ru, CAO Yang-rong. Research Progress on the Immune Regulation of Symbiotic Nitrogen Fixation Between Legumes and Rhizobia[J]. Biotechnology Bulletin, 2019, 35(10): 25-33.

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