FN Archimer Export Format
PT J
TI Functional capacities of gill mitochondria in oyster Crassostrea gigas during an emersion/immersion tidal cycle
BT 
AF DUDOGNON, Tony
   SOUDANT, Philippe
   SEGUINEAU, Catherine
   QUERE, Claudie
   AUFFRET, Michel
   KRAFFE, Edouard
AS 1:1;2:1;3:2;4:2;5:1;6:1;
FF 1:;2:;3:;4:PDG-RBE-PFOM-PI;5:;6:;
C1 Univ Bretagne Occidentale, Lab Sci Environm Marin, Inst Univ Europeen Mer, UMR CNRS UBO IRD IFREMER 6539, F-29280 Plouzane, France.
   IFREMER, Lab Physiol Invertebres, UMR CNRS UBO IRD IFREMER 6539, F-29280 Plouzane, France.
C2 UBO, FRANCE
   IFREMER, FRANCE
SI BREST
   UNIV-FRANCAISE
SE PDG-RBE-PFOM-PI
   UBO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 0.919
TC 10
UR https://archimer.ifremer.fr/doc/00157/26854/24981.pdf
LA English
DT Article
DE ;Mitochondria;oxygen consumption;ATP production;respiratory chain inhibitor;Crassostrea gigas
AB Sessile animals that live on the foreshore undergo tidal cycles, and have to face variations in physical and chemical parameters such as oxygen concentration. During emersion, availability of dissolved oxygen can be lowered for bivalves, which have only a small reserve of seawater inside their closed shell. Differences in oxygen concentration are thus expected to lead to modifications of the metabolism, including changes in mitochondrial activity. Previous studies investigated air exposure under extreme conditions, which do not always reflect environmental conditions these invertebrates have to cope with. In this study, oxidative capacities of gill mitochondria of the oyster Crassostrea gigas were studied during a tidal cycle period, by comparing oysters collected after emersion and immersion. Only minor differences were found in state 3 (oxidative phosphorylation) or state 4 (non-phosphorylating oxygen consumption) rates between the two conditions. Similarly, no difference was observed in cytochrome c oxidase activity or in oxygen consumption related to maximal electron flux through complexes I-IV, II-IV and IV. While capacities of substrate oxidation were maintained in both emersion and immersion conditions, capacity of mitochondria to produce adenosine triphosphate (ATP) was significantly lower in oysters sampled during emersion. These results suggest that although C. gigas could maintain aerobic metabolism during emersion period within a tidal cycle in its environment, energy producing mechanisms are affected.
PY 2013
PD JUN
SO Aquatic Living Resources
SN 0990-7440
PU Edp Sciences S A
VL 26
IS 3
UT 000324283000006
BP 249
EP 256
DI 10.1051/alr/2013053
ID 26854
ER

EF