The expression pattern of hsp70 plays a critical role in thermal tolerance of marine demersal fish: Multilevel responses of Paralichthys olivaceus and its hybrids (P. olivaceus ♀ × P. dentatus ♂) to chronic and acute heat stress.

Abstract:

:Ocean warming has multifaceted impacts on marine organisms. This study investigated the different responses of Paralichthys olivaceus and the hybrids (P. olivaceus ♀ × P. dentatus ♂) to chronic and acute heat stress. By comparing their survival, behavioural and histological changes, we found that the hybrids possess a better thermal tolerance with a higher cumulative survival rate (CSR), relatively fewer behavioural changes and less gill damage. Moreover, we analysed the relationship between thermal tolerance and the hsp70 expression pattern and found that thermal tolerant species (the hybrids) exhibited higher threshold induction temperature, shorter durations, stronger magnitudes and a delay in hsp70 expression. We speculated that the expression mode of hsp70, rather than itself, plays a critical role in thermal tolerance. These findings would improve the understanding of hsp70 in future marine climate research and help clarify the profound effects of rising temperature on marine demersal fishes.

journal_name

Mar Environ Res

authors

Liu Y,Ma D,Zhao C,Xiao Z,Xu S,Xiao Y,Wang Y,Liu Q,Li J

doi

10.1016/j.marenvres.2017.06.015

subject

Has Abstract

pub_date

2017-08-01 00:00:00

pages

386-395

eissn

0141-1136

issn

1879-0291

pii

S0141-1136(17)30074-0

journal_volume

129

pub_type

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