FN Archimer Export Format
PT J
TI Inorganic carbon fixation by chemosynthetic ectosymbionts and nutritional transfers to the hydrothermal vent host-shrimp Rimicaris exoculata
BT 
AF PONSARD, Julie
   CAMBON-BONAVITA, Marie-Anne
   ZBINDEN, Magali
   LEPOINT, Gilles
   JOASSIN, Andre
   CORBARI, Laure
   SHILLITO, Bruce
   DURAND, Lucile
   CUEFF-GAUCHARD, Valerie
   COMPERE, Philippe
AS 1:1;2:2;3:3;4:4;5:5;6:6;7:3;8:2;9:2;10:1;
FF 1:;2:PDG-REM-EEP-LMEE;3:;4:;5:;6:;7:;8:PDG-REM-EEP-LMEE;9:PDG-REM-EEP-LMEE;10:;
C1 Univ Liege, Lab Morphol Fonct & Evolut, Dept Biol Ecol & Evolut, Ctr MARE, B-4000 Liege, Belgium.
   UBO, Lab Microbiol Environm Extremes, IFREMER, CNRS,UMR 6197, Plouzane, France.
   Univ Paris 06, Equipe Adaptat Milieux Extremes, CNRS, UMR 7138, Paris 05, France.
   Univ Liege, Lab Oceanol, Dept Biol Ecol & Evolut, Ctr MARE, B-4000 Liege, Belgium.
   Univ Liege, Lab Chim Coordinat & Radiochim, Dept Chim, B-4000 Liege, Belgium.
   Museum Natl Hist Nat, Equipe Especes & Speciat, CNRS, UMR 7138, Paris 05, France.
C2 UNIV LIEGE, BELGIUM
   IFREMER, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV LIEGE, BELGIUM
   UNIV LIEGE, BELGIUM
   MNHN, FRANCE
SI BREST
   AUTRE
SE PDG-REM-EEP-LMEE
   AUTRE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 9.267
TC 82
UR https://archimer.ifremer.fr/doc/00114/22507/20190.pdf
LA English
DT Article
CR MOMARDREAM-NAUT1-NAUT2
BO Pourquoi pas ?
DE ;autoradiography;chemosynthetic ectosymbiosis;Crustacea;isotopes;Rimicaris exoculata;transtegumental transfer
AB The shrimp Rimicaris exoculata dominates several hydrothermal vent ecosystems of the Mid- Atlantic Ridge and is thought to be a primary consumer harbouring a chemoautotrophic bacterial community in its gill chamber. The aim of the present study was to test current hypotheses concerning the epibiont’s chemoautotrophy, and the mutualistic character of this association. Invivo experiments were carried out in a pressurised aquarium with isotope-labelled inorganic carbon (NaH13CO3 and NaH14CO3) in the presence of two different electron donors (Na2S2O3 and Fe2þ) and with radiolabelled organic compounds (14C-acetate and 3H-lysine) chosen as potential bacterial substrates and/or metabolic by-products in experiments mimicking transfer of small biomolecules from epibionts to host. The bacterial epibionts were found to assimilate inorganic carbon by chemoautotrophy, but many of them (thick filaments of epsilonproteobacteria) appeared versatile and able to switch between electron donors, including organic compounds (heterotrophic acetate and lysine uptake). At least some of them (thin filamentous gammaproteobacteria) also seem capable of internal energy storage that could supply chemosynthetic metabolism for hours under conditions of electron donor deprivation. As direct nutritional transfer from bacteria to host was detected, the association appears as true mutualism. Import of soluble bacterial products occurs by permeation across the gill chamber integument, rather than via the digestive tract. This first demonstration of such capabilities in a decapod crustacean supports the previously discarded hypothesis of transtegumental absorption of dissolved organic matter or carbon as a common nutritional pathway.
PY 2013
PD JAN
SO Isme Journal
SN 1751-7362
PU Nature Publishing Group
VL 7
IS 1
UT 000313236000009
BP 96
EP 109
DI 10.1038/ismej.2012.87
ID 22507
ER

EF