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Author： Zhai Chunmei Zhang Ping Shen Fei Zhou Changxin Liu Changhong

ISSN： 0378-1097

Source： FEMS Microbiology Letters, Vol.336, Iss.1, 2012-11, pp. : 38-44

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Abstract

AbstractQuorum sensing (QS) is a system of cell-to-cell communication by means of intercellular signaling molecules to coordinate a set of targeted gene expression or repression in many Gram-negative bacteria; it plays important roles for bacteria in adaptation to adverse environmental conditions. In this study, we first demonstrated that Microcystis aeruginosa PCC-7820 could produce QS-related signal acylated homoserine lactones (AHLs) among the metabolite of axenic M. aeruginosa, based on bioassay and liquid chromatography–mass spectrometry (LC-MS) analysis. The concentration of the AHLs in the culture medium was cell density dependent and reached a maximum of 18 nM at 1.03 × 10⁷ cells mL⁻¹, 30 days after inoculation. The regulation mechanism of QS in M. aeruginosa and its possible role in bloom formation are discussed.