摘要
细菌在高细胞密度下可以产生群体感应信号分子,调控细菌相关基因的表达,这种信号分子被称为自体诱导物。酰基高丝氨酸内酯类化合物(acyl HSLs)是在根瘤菌中广泛存在的一类自体诱导物,该群体感应系统与根瘤菌和植物的共生作用密切相关。本文概述了AHLs介导的群体感应系统的组成及调控机制和不同根瘤菌中群体感应调节对根瘤菌生理行为及共生固氮的影响。
Bacteria can regulate gene expression by producing signal molecules termed autoinducers at high cell density.In general,Gram-negative nitrogen-fixation rhizobia use acylated homoserine lactones (acy1-HSLs) as autoinducers.Quorum sensing plays important roles in coordinating the symbiotic process during the interactions between rhizobia and their legume hosts.This review summarized the composition and regulation mechanisms of AHLs-mediated quorum sensing,physiological activity changes and symbiotic nitrogen-fixing effects caused by quorum sensing in rhizobia.
出处
《生态学杂志》
CAS
CSCD
北大核心
2005年第5期547-550,共4页
Chinese Journal of Ecology
基金
国家杰出青年基金项目(30325004)
国家重点基础研究发展规划项目(001CB1089)
国家自然科学基金资助项目(30200036)。
关键词
根瘤菌
群体感应
AHLs
结瘤
固氮
nitrogen-fixation rhizobia,quorum sensing,AHLs,nodulation,nitrogen fixation.