Quorum sensing in nitrogen-fixation rhizobia

Abstract

Abstract: 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.

Key words: Cd and Pb pollution, Tobacco, Root zone, Soil microbe, Quality

CLC Number:

Q933

ZHENG Huiming, ZHONG Zengtao, CHEN Yi'nan, ZHU Jun. Quorum sensing in nitrogen-fixation rhizobia[J]. cje, 2005, (5): 547-550.

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