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<title lang=en>Comparative modifications in bacterial gill-endosymbiotic populations of the two bivalves Codakia orbiculata and Lucina pensylvanica during bacterial loss and reacquisition</title>
<creator>Elisabeth, Nathalie H.</creator>
<creator>Caro, Audrey</creator>
<creator>Cesaire, Thierry</creator>
<creator>Mansot, Jean-Louis</creator>
<creator>Escalas, Arthur</creator>
<creator>Sylvestre, Marie-Noelle</creator>
<creator>Jean-Louis, Patrick</creator>
<creator>Gros, Olivier</creator>
<contributor>Biologie de la Mangrove (BM) ; Systématique, adaptation, évolution (SAE) ; Université Pierre et Marie Curie - Paris 6 (UPMC) - Centre National de la Recherche Scientifique (CNRS) - Université Pierre et Marie Curie - Paris 6 (UPMC) - Centre National de la Recherche Scientifique (CNRS) - Evolution Paris Seine ; Université Nice Sophia Antipolis (UNS) ; Université Côte d'Azur (UCA) - Université Côte d'Azur (UCA) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Université Pierre et Marie Curie - Paris 6 (UPMC) - Université Nice Sophia Antipolis (UNS) ; Université Côte d'Azur (UCA) - Université Côte d'Azur (UCA) - Université des Antilles et de la Guyane (UAG)</contributor>
<description>International audience</description>
<source>ISSN: 0168-6496</source>
<source>EISSN: 1574-6941</source>
<source>FEMS Microbiology Ecology</source>
<publisher>Wiley-Blackwell</publisher>
<identifier>hal-01545911</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01545911</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01545911</source>
<source>FEMS Microbiology Ecology, Wiley-Blackwell, 2014, 89 (3), pp.646-658. 〈10.1111/1574-6941.12366〉</source>
<identifier>DOI : 10.1111/1574-6941.12366</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1111/1574-6941.12366</relation>
<language>en</language>
<subject lang=en>Lucinidae</subject>
<subject lang=en> endosymbiotic population</subject>
<subject lang=en> starvation</subject>
<subject lang=en> sulphur content</subject>
<subject lang=en> cell size</subject>
<subject lang=en> genomic content</subject>
<subject>[SDV.BID] Life Sciences [q-bio]/Biodiversity</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Until now, the culture of sulphur-oxidizing bacterial symbionts associated with marine invertebrates remains impossible. Therefore, few studies focused on symbiont's physiology under stress conditions. In this study, we carried out a comparative experiment based on two different species of lucinid bivalves (Codakia orbiculata and Lucina pensylvanica) under comparable stress factors. The bivalves were starved for 6months in sulphide-free filtered seawater. For C.orbiculata only, starved individuals were then put back to the field, in natural sediment. We used in situ hybridization, flow cytometry and X-ray fluorescence to characterize the symbiont population hosted in the gills of both species. In L.pensylvanica, no decrease in symbiont abundance was observed throughout the starvation experiment, whereas elemental sulphur slowly decreased to zero after 3months of starvation. Conversely, in C.orbiculata, symbiont abundance within bacteriocytes decreased rapidly and sulphur from symbionts disappeared during the first weeks of the experiment. The modifications of the cellular characteristics (SSC - relative cell size and FL1 - genomic content) of the symbiotic populations along starvation were not comparable between species. Return to the sediment of starved C.orbiculata individuals led to a rapid (2-4weeks) recovery of symbiotic cellular characteristics, comparable with unstressed symbionts. These results suggest that endosymbiotic population regulation is host-species-dependent in lucinids.</description>
<date>2014-09</date>
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