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根瘤菌群体感应系统在共生结瘤过程中的功能

Role of quorum sensing in Rhizobium-legume symbiotic interactions
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摘要 根瘤菌能够合成群体感应(quorum sensing,QS)信号分子——酰基高丝氨酸内酯(N-acyl homoserine lactone,AHL)类化合物,其在与豆科植物共生结瘤的过程中,以群体密度依赖的方式通过AHLs诱导相关基因的表达。目前,根瘤菌QS系统的研究结果主要来自根瘤菌属和中华根瘤菌属。不同根瘤菌中的QS系统明显不同,它们对共生过程的影响有很大区别。同时,寄主植物也能通过分泌AHLs类似物等方式介导根瘤菌QS系统的表达。本文在简要介绍革兰氏阴性菌群体感应系统的基础上,综述了不同根瘤菌群体感应系统的类型及其对共生结瘤的影响,以及豆科植物对群体感应系统的响应等方面的研究进展,并对当前根瘤菌与豆科植物共生互作早期QS系统功能研究中存在的问题及今后的研究方向进行了分析与展望。 Rhizobia can produce N-acyl homoserine lactones(AHLs),which regulate the induction of gene expression involved in symbiotic nodulation with legumes in a population-density-dependent manner.Till now,the study of quorum-sensing systems in rizobia is mainly focused on Rhizobiumand Sinorhizobium.There is significant diversity in the types of quorum-sensing regulatory systems that are present in different rhizobia and distinct difference in effects on Rhizobium-legume symbiotic interactions.The host legumes also...
出处 《西北农林科技大学学报(自然科学版)》 CSCD 北大核心 2010年第10期171-177,共7页 Journal of Northwest A&F University(Natural Science Edition)
基金 陕西省自然科学基金项目(2009JM3011) 西北农林科技大学基本科研业务费专项(QN2009068)
关键词 根瘤菌 群体感应 共生互作 基因表达 豆科植物 rhizobium quorum sensing symbiotic interaction gene expression legume
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参考文献61

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