FN Archimer Export Format
PT J
TI Evidence for differences in the allozyme thermostability of deep-sea hydrothermal vent polychaetes (Alvinellidae): a possible selection by habitat
BT 
AF JOLLIVET, D
   DESBRUYERES, Daniel
   LADRAT, Christine
   LAUBIER, Lucien
AS 1:1;2:2;3:2;4:3;
FF 1:;2:;3:;4:;
C1 Plymouth Marine Laboratory, Molecular Biology Department, Citadel Hill. Plymouth PL1 2PB, United Kingdom
   IFREMER, CTR BREST, DRO EP, F-29280 PLOUZANE, FRANCE.
   INST OCEANOG, F-75005 PARIS, FRANCE.
C2 PML, UK
   IFREMER, FRANCE
   INST OCEANOG, FRANCE
SI BREST
IN WOS Ifremer jusqu'en 2018
IF 1.928
TC 40
UR https://archimer.ifremer.fr/doc/00213/32394/30857.pdf
LA English
DT Article
CR STARMER 1
   STARMER 2
BO Le Nadir
DE ;DEEP-SEA HYDROTHERMAL VENTS;ALLOZYMES;ASPARTATE AMINO TRANSFERASE;GLUCOSE-6-PHOSPHATE ISOMERASE;PHOSPHOGLUCOMUTASE;TEMPERATURE;SELECTION
AB Alvinellid polychaetes are, to date, restricted to deep-sea hydrothermal vents of the eastern and the western ridges of the Pacific Ocean. These organisms Live in various sulfide-rich habitats, including the hottest part of the hydrothermal environment (i.e. chimneys). They experience transient anoxia, high levels of heavy metals and H2S, natural radioactivity and temperatures ranging from 5 to 80 degrees C which vary greatly with time. The Alvinellidae, as many vent organisms, have developed specific adaptations to cope with this harsh and unstable environment. Enzyme systems are good markers of the adaptation of ectotherms to temperature, which acts on both enzyme kinetics and protein denaturation. We estimated genetic distances between 11 alvinellid species using a data set of allozymes and studied in vitro allozyme thermostabilities of aspartate-amino transferase (AAT), glucose-6-phosphate isomerase (GPI) and phosphoglucomutase (PGM), which may play a role in orientating aerobic versus anaerobic metabolism pathways, for 8 species using the most common homozygous genotypes. Results show great genetic divergences between species living in distinct microhabitats as well as strong thermostability differences within and between species which also rely on different enzymatic strategies (phenotypic plasticity versus genetic variability). Allelic fitness to temperature in a highly fluctuating environment may explain the high level of polymorphism found in alvinellids and may have also provided sufficient genetic divergence between individuals living in distinct thermal regimes to produce speciation.
PY 1995
PD JUN
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 123
IS 1-3
UT A1995RQ34100013
BP 125
EP 136
DI 10.3354/meps123125
ID 32394
ER

EF