Degradation of N-Acylhomoserine Lactone Quorum Sensing Signaling Molecules by Potato Root Surface-Associated Chryseobacterium Strains

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  • Rashid Rumana
    Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University
  • Morohoshi Tomohiro
    Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University
  • Someya Nobutaka
    National Agricultural Research Center for Hokkaido Region (NARCH), National Agricultural and Food Research Organization (NARO)
  • Ikeda Tsukasa
    Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University

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Other Title
  • Degradation of N-acylhomoserine lactone quorum sensing signal molecules by potato root surface-associated Chryseobacterium strains

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Description

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-<sc>L</sc>-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-<sc>L</sc>-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.<br>

Journal

  • Microbes and Environments

    Microbes and Environments 26 (2), 144-148, 2011

    Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles

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