Heat-shock response and temperature resistance in the deep-sea vent shrimp Rimicaris exoculata.
The shrimp Rimicaris exoculata swarms around hydrothermal black smoker chimneys at most vent sites along the Mid-Atlantic Ridge. This species maintains close proximity to the hydrothermal fluid, where temperatures can reach 350 degrees C and steep thermal and chemical gradients are expected. We performed in vivo experiments in pressurized aquaria to determine the upper thermal limit [critical thermal maximum (CT(max))] of R. exoculata and to investigate some characteristics of the shrimp stress response to heat exposure. These experiments showed that the shrimp does not tolerate sustained exposure to temperatures in the 33-37 degrees C range (CT(max)). A heat-inducible stress protein belonging to the hsp70 family was identified in R. exoculata, and its synthesis threshold induction temperature is below 25 degrees C. The R. exoculata optimal thermal habitat may thus be restricted to values lower than previously expected (<25 degrees C).
Ravaux
Juliette
J
UMR CNRS 7138 Systématique, Adaptation et Evolution, Université Pierre et Marie Curie, 7 Quai St-Bernard, Batiment A, 75252 Paris Cedex 05, France.
Gaill
Françoise
F
Le Bris
Nadine
N
Sarradin
Pierre-Marie
PM
Jollivet
Didier
D
Shillito
Bruce
B
D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D015153:Blotting, Western; D001833:Body Temperature Regulation / Q000502:physiology*; D033364:Decapoda / Q000502:physiology*; D004777:Environment; D018840:HSP70 Heat-Shock Proteins / Q000737:chemistry; D018869:Heat-Shock Response / Q000502:physiology*; D008386:Marine Biology; D009792:Oceans and Seas; D013696:Temperature; D014741:Video Recording
D018840:HSP70 Heat-Shock Proteins