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Le Bloa S, Durand L, Cueff- Gauchard V, Le Bars J, Taupin L, Marteau C, Bazire A, Cambon-Bonavita MA. Highlighting of quorum sensing lux genes and their expression in the hydrothermal vent shrimp Rimicaris exoculata ectosymbiontic community. Possible use as biogeographic markers. PLoS One 2017; 12:e0174338. [PMID: 28328982 PMCID: PMC5362221 DOI: 10.1371/journal.pone.0174338] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 03/07/2017] [Indexed: 01/26/2023] Open
Abstract
Rimicaris exoculata is a caridean shrimp that dominates the fauna at several hydrothermal vent sites of the Mid-Atlantic Ridge. It has two distinct and stable microbial communities. One of these epibiontic bacterial communities is located in the shrimp gut and has a distribution and role that are poorly understood. The second colonizes its enlarged gill chamber and is involved in host nutrition. It is eliminated after each molt, and has colonization processes reminiscent of those of a biofilm. The presence and expression of genes usually involved in quorum sensing (QS) were then studied. At four sites, Rainbow, TAG, Snake Pit and Logatchev, two lux genes were identified in the R. exoculata epibiontic community at different shrimp molt stages and life stages. RT-PCR experiments highlighted lux gene expression activity at TAG, Snake Pit and Rainbow vent sites. Their potential QS activity and their possible roles in epibiont colonization processes are discussed. Moreover, phylogenetic analysis has shown the presence of three clades for luxS (Epsilonproteobacteria) and four clades for luxR (Gammaproteobacteria) genes, each clade being restricted to a single site. These genes are more divergent than the 16S rRNA one. They could therefore be used as biogeographical genetic markers.
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Affiliation(s)
- Simon Le Bloa
- Ifremer, Centre Bretagne, Laboratoire de Microbiologie des Environnements Extrêmes, REM/EEP/LM2E, UMR 6197 Ifremer-CNRS-UBO, ZI Pointe du Diable, CS, Plouzané, France
- Université de Brest, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
- CNRS, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
| | - Lucile Durand
- Ifremer, Centre Bretagne, Laboratoire de Microbiologie des Environnements Extrêmes, REM/EEP/LM2E, UMR 6197 Ifremer-CNRS-UBO, ZI Pointe du Diable, CS, Plouzané, France
| | - Valérie Cueff- Gauchard
- Ifremer, Centre Bretagne, Laboratoire de Microbiologie des Environnements Extrêmes, REM/EEP/LM2E, UMR 6197 Ifremer-CNRS-UBO, ZI Pointe du Diable, CS, Plouzané, France
- Université de Brest, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
- CNRS, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
| | - Josiane Le Bars
- Ifremer, Centre Bretagne, Laboratoire de Microbiologie des Environnements Extrêmes, REM/EEP/LM2E, UMR 6197 Ifremer-CNRS-UBO, ZI Pointe du Diable, CS, Plouzané, France
- Université de Brest, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
- CNRS, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
| | - Laure Taupin
- Université de Bretagne-Sud, EA 3884, LBCM, Rue de Saint Maudé, Lorient, France
| | - Charlotte Marteau
- Université de Bretagne-Sud, EA 3884, LBCM, Rue de Saint Maudé, Lorient, France
| | - Alexis Bazire
- Université de Bretagne-Sud, EA 3884, LBCM, Rue de Saint Maudé, Lorient, France
| | - Marie-Anne Cambon-Bonavita
- Ifremer, Centre Bretagne, Laboratoire de Microbiologie des Environnements Extrêmes, REM/EEP/LM2E, UMR 6197 Ifremer-CNRS-UBO, ZI Pointe du Diable, CS, Plouzané, France
- Université de Brest, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
- CNRS, Laboratoire de Microbiologie des Environnements Extrêmes, UMR 6197 Ifremer-CNRS-UBO, Technopôle Iroise, 4 place Nicolas Copernic, Plouzané, France
- * E-mail:
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