Article (Scientific journals)
New digestive symbiosis in the hydrothermal vent amphipoda Ventiella sulfuris
Corbari, L.; Durand, L.; Cambon-Bonavita, M.-A. et al.
2012In Comptes Rendus Biologies, 335 (2), p. 142-154
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Keywords :
Amphipoda; Bacterial symbiosis; Hindgut; Hydrothermal vents; Midgut; RNA 16S; Epsilonproteobacteria; Ventiella sulfuris; Animals; Digestive System; Microscopy, Electron, Scanning; Microscopy, Electron, Transmission; Symbiosis; East Pacific Rise; Pacific Ocean; Alvinella pompejana; Alvinellidae; Bacteria (microorganisms)
Abstract :
[en] Ventiella sulfuris Barnard and Ingram, 1990 is the most abundant amphipod species inhabiting the Eastern Pacific Rise (EPR 9°N) vent fields. This vent-endemic species is frequently encountered near colonies of Pompeii worms Alvinella pompejana. V. sulfuris specimens were collected during the oceanographic cruise LADDER II at the Bio9 (9°50.3′ N, 2508 m depth) hydrothermal vent site. Main objectives were to highlight the occurrence of bacterial symbiosis in V. sulfuris and to hypothesise their implications in nutrition. Observations in light and electron microscopy (SEM, TEM) showed that the outer body surface and appendages are free of microorganisms. In contrast, the digestive system revealed two major microbial communities settled in the midgut and in the hindgut. Gut contents showed bacterial traces together with abundant fragments of Alvinellid cuticle and setae, from A. pompejana, suggesting that V. sulfuris could directly feed on Alvinellids and/or on their bacterial epibionts. Molecular analyses based on the 16S rRNA genes revealed the diversity of bacterial communities in the digestive system, of which, the Epsilonproteobacteria phylum, could be considered as one of the major bacterial group. Hypotheses were proposed on their symbiotic features and their implications in V. sulfuris nutrition. © 2011 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Corbari, L.;  Muséum National d'Histoire Naturelle, Département Systématique et Évolution, UMR 7138 Systematique, Adaptation et Evolution, Equipe Espces et Speciation, 57, rue Cuvier, CP 26, 75231 Paris cedex 05, France
Durand, L.;  Ifremer, Centre de Brest, Laboratoire de Microbiologie des Environnements Extrêmes, BP 70, 29280 Plouzané, France
Cambon-Bonavita, M.-A.;  Ifremer, Centre de Brest, Laboratoire de Microbiologie des Environnements Extrêmes, BP 70, 29280 Plouzané, France
Gaill, F.;  Université Pierre et Marie Curie, UMR CNRS 7138 Systématique, Adaptation et Évolution, Bâtiment A, 7, quai Saint-Bernard, 75252 Paris cedex 05, France
Compère, Philippe ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Département de Biologie, Ecologie et Evolution
Language :
English
Title :
New digestive symbiosis in the hydrothermal vent amphipoda Ventiella sulfuris
Publication date :
2012
Journal title :
Comptes Rendus Biologies
ISSN :
1631-0691
Publisher :
Elsevier Masson, France
Volume :
335
Issue :
2
Pages :
142-154
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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