Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/15546
Title: Characterization of N-acylhomoserine lactone degrading bacteria associated with the Zingiber officinale (ginger) rhizosphere: Co-existence of quorum quenching and quorum sensing in Acinetobacter and Burkholderia
Authors: Chan, Kok Gan
Atkinson, Steve
Kalai Mathee
Sam, Choon Kook
Siri Ram Chhabra
Camara, Miguel
Koh, Chong Lek
Williams, Paul
Issue Date: 2011
Citation: Chan, K. G., Atkinson, S., Mathee, K., Sam, C. K., Chhabra, S. R., Cámara, M., ... & Williams, P. (2011). Characterization of N-acylhomoserine lactone-degrading bacteria associated with the Zingiber officinale (ginger) rhizosphere: Co-existence of quorum quenching and quorum sensing in Acinetobacter and Burkholderia. BMC Microbiology, 11, 51.
Abstract: Background: Cell-to-cell communication (quorum sensing (QS)) co-ordinates bacterial behaviour at a population level. Consequently the behaviour of a natural multi-species community is likely to depend at least in part on coexisting QS and quorum quenching (QQ) activities. Here we sought to discover novel N-acylhomoserine lactone (AHL)-dependent QS and QQ strains by investigating a bacterial community associated with the rhizosphere of ginger (Zingiber officinale) growing in the Malaysian rainforest. Results: By using a basal growth medium containing N-(3-oxohexanoyl)homoserine lactone (3-oxo-C6-HSL) as the sole source of carbon and nitrogen, the ginger rhizosphere associated bacteria were enriched for strains with AHLdegrading capabilities. Three isolates belonging to the genera Acinetobacter (GG2), Burkholderia (GG4) and Klebsiella (Se14) were identified and selected for further study. Strains GG2 and Se14 exhibited the broadest spectrum of AHL-degrading activities via lactonolysis while GG4 reduced 3-oxo-AHLs to the corresponding 3-hydroxy compounds. In GG2 and GG4, QQ was found to co-exist with AHL-dependent QS and GG2 was shown to inactivate both self-generated and exogenously supplied AHLs. GG2, GG4 and Se14 were each able to attenuate virulence factor production in both human and plant pathogens. Conclusions: Collectively our data show that ginger rhizosphere bacteria which make and degrade a wide range of AHLs are likely to play a collective role in determining the QS-dependent phenotype of a polymicrobial community.
URI: http://hdl.handle.net/10497/15546
ISSN: 1471-2180
Other Identifiers: 10.1186/1471-2180-11-51
Website: http://www.biomedcentral.com/content/pdf/1471-2180-11-51.pdf
Appears in Collections:Journal Articles

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