BOREA Biologie des Organismes et Ecosystèmes Aquatiques, UMR 7208 MNHN CNRS SU UA UCN IRD 207, Equipe Adaptation aux Milieux Extrêmes, Sorbonne Université, Bât. A, 4e étage, 7 Quai St Bernard, 75005, Paris, France.
IMPMC Institut de Minéralogie, de Physique des Matériaux et Cosmochimie, UMR CNRS SU 7590, Sorbonne Université, Paris Cedex 05, France.
Cell Stress Chaperones. 2019 May;24(3):647-659. doi: 10.1007/s12192-019-01003-0. Epub 2019 May 9.
Assessing species thermal tolerance requires identification of their thermal strategies and evaluation of their ability to cope with temperature fluctuations. The mobilization of the molecular heat stress response (HSR), which is a proxy for the thermal tolerance, would be part of the strategy of species colonizing highly variable thermal environments. We here investigate multiple parameters of the HSR in the deep-sea vent shrimp Rimicaris exoculata that colonizes such environments. The set points of the HSR induction, compared to those of the coastal species Palaemonetes varians, clearly reflect a high thermotolerance in this species, while the HSR is proved to be rarely mobilized in the R. exoculata natural populations. Finally, the compilation of multiple parameters such as the upper thermal limit and several thresholds of the HSR, as well as thermal behavior observations, allows us to provide a more accurate picture of the combination and complementarity of strategies that can account for the overall thermal tolerance of the species.
评估物种的热耐受能力需要确定其热策略，并评估其应对温度波动的能力。分子热应激反应（HSR）的动员是物种在高度变化的热环境中生存的策略的一部分。我们在这里研究了在栖息于这种环境中的深海喷口虾 Rimicaris exoculata 中 HSR 的多个参数。与沿海物种 Palaemonetes varians 相比，HSR 的诱导设定点清楚地反映了该物种的高耐热性，而在 R. exoculata 自然种群中，HSR 很少被动员。最后，综合多个参数，如热限和 HSR 的多个阈值，以及热行为观察，使我们能够更准确地描述可以解释物种整体热耐受性的策略的组合和互补性。
