Highly polluted life history and acute heat stress, a hazardous mix for blue mussels. (October 2018)

• Record Type: Journal Article
• Authors: Péden, Romain; Rocher, Béatrice; Chan, Philippe; Vaudry, David; Poret, Agnès; Olivier, Stéphanie; Le Foll, Frank; Bultelle, Florence
• Is Part Of: Marine pollution bulletin. Volume 135(2018)
• Page Start: 594
• Page End: 606
• Publication Date: 2018-10
• Subjects: Mytilus edulis -- Life history -- Stress on stress -- Proteomic -- Gills; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2018.07.066
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: Intertidal sessile organisms constitute through their life history unintended stress recorders. This study focuses on the impact of pollution on Mytilus edulis ability to cope with an additional stress. For this purpose, two acclimation stages to different temperatures were conducted before an acute stress exposure in mussels collected from a heavily polluted site. Gill proteomes were analyzed by 2DE and regulated proteins identified. Massive mortality was observed for organisms acclimated to colder temperatures. Despite this major difference, both groups shared a common response with a strong representation of proteoforms corresponding to "folding, sorting and degradation" processes. Nevertheless, surviving mussels exhibit a marked increase in protein degradation consistent with the observed decrease of cell defense proteins. Mussels acclimated to warmer temperature response is essentially characterized by an improved heat shock response. These results show the differential ability of mussels to face both pollution and acute heat stress, particularly for low-acclimated organisms. Graphical abstract: Highlights: 2DE were carried out on contaminated mussels after acclimation and acute heat stress. High mortality rate were observed for non-acclimated mussels. Acclimated mussels show enhanced stress protein expressions. Surviving mussels exhibited a main distress signal associated with truncated proteins.