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Biosci Biotechnol Biochem. 2009 Sep;73(9):2124-7. Epub 2009 Sep 7.

Novel N-acylhomoserine lactone-degrading bacteria isolated from the leaf surface of Solanum tuberosum and their quorum-quenching properties.

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  • 1Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan.


We isolated and identified AHL-degrading bacteria from the leaf surface of Solanum tuberosum. The 16 isolates inactivated both short- and long-chain AHLs. Two of these isolates, identified as Microbacterium testaceum, showed putative AHL-lactonase activity. These two strains interrupted quorum-sensing dependent bacterial infection by plant pathogen Pectobacterium carotovorum subsp. carotovorum. M. testaceum strains, which were isolated in this study, might be useful in the biocontrol of plant diseases.

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