Diversity and quorum-sensing signal production of Proteobacteria associated with marine sponges

Environmental Microbiology
Naglaa M MohamedRussell T Hill

Abstract

Marine sponges are hosts to diverse and dense bacterial communities and thus provide a potential environment for quorum sensing. Quorum sensing, a key factor in cell-cell communication and bacterial colonization of higher animals, might be involved in the symbiotic interactions between bacteria and their sponge hosts. Given that marine Proteobacteria are known to produce N-acyl homoserine lactone (AHL) signal molecules, we tested the production of AHLs by Alpha- and Gammaproteobacteria isolated from marine sponges Mycale laxissima and Ircinia strobilina and the surrounding water column. We used three different AHL biodetection systems in diffusion assays: Chromobacterium violaceum, Agrobacterium tumefaciens and Sinorhizobium meliloti with optimal sensitivity to short-chain (C4-C6), moderate-chain (C8-C12) and long-chain (>or= C14) AHLs respectively. Thirteen of 23 isolates from M. laxissima and five of 25 isolates from I. strobilina were found to produce AHLs. Signals were detected from two of eight proteobacterial strains from the water column. Thin-layer chromatographic assays based on the A. tumefaciens reporter system were utilized to determine the AHL profiles of the positive isolates. The types and amounts of AHLs synthes...Continue Reading

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Citations

Dec 4, 2010·Chemical Reviews·Mair E A Churchill, Lingling Chen
Aug 12, 2009·Applied and Environmental Microbiology·Rachael N Slightom, Alison Buchan
Apr 7, 2009·Applied and Environmental Microbiology·Jean-Baptiste RainaDavid G Bourne
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Jul 24, 2012·Marine Drugs·Laura R HuntLaura D Mydlarz
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Jan 26, 2020·International Journal of Molecular Sciences·Sergey Dobretsov, Daniel Rittschof
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Jul 26, 2019·Marine Drugs·Anabela Borges, Manuel Simões
Jan 10, 2019·Frontiers in Microbiology·Sabine Matallana-SurgetPhilippe Lebaron

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