Microbes and Environments
Online ISSN : 1347-4405
Print ISSN : 1342-6311
ISSN-L : 1342-6311
Regular Papers
Degradation of N-Acylhomoserine Lactone Quorum Sensing Signaling Molecules by Potato Root Surface-Associated Chryseobacterium Strains
Rumana RashidTomohiro MorohoshiNobutaka SomeyaTsukasa Ikeda
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2011 Volume 26 Issue 2 Pages 144-148

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Abstract

N-Acylhomoserine lactones (AHLs) are used as quorum-sensing signaling molecules by many Gram-negative bacteria. Here, 413 bacterial strains were obtained from the roots of potato plants and screened for AHL-degrading bacteria using Chromobacterium violaceum reporter strains. Sixty one isolates degraded N-hexanoyl-L-homoserine lactone (C6-HSL) within 24 h. Based on their 16S rRNA gene sequences, most of these isolates were assigned to the genus Chryseobacterium and divided into eight groups. Most of the strains degraded N-decanoyl-L-homoserine lactone (C10-HSL) and were active against 3-oxo-substituted AHLs. Groups V and VI were more effective at inactivating AHLs. One group V strain, StRB402, showed putative AHL-lactonase activity. This is the first report of AHL-degrading Chryseobacterium strains.

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© Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology
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