Evolution in chronic cold: varied loss of cellular response to heat in Antarctic notothenioid fish.

ABSTRACT:

Background

Confined within the freezing Southern Ocean, the Antarctic notothenioids have evolved to become both cold adapted and cold specialized. A marked signature of cold specialization is an apparent loss of the cellular heat shock response (HSR). As the HSR has been examined in very few notothenioid species to-date, it remains unknown whether HSR loss pervades the Antarctic radiation, or whether the broader cellular responses to heat stress has sustained similar loss. Understanding the evolutionary status of these responses in this stenothermal taxon is crucial for evaluating its adaptive potential to ocean warming under climate change.

Results

In this study, we used an acute heat stress protocol followed by RNA-Seq analyses to study the evolution of cellular-wide trans

SUBMITTER: Bilyk KT 

PROVIDER: S-EPMC6146603 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature