StressCovidV1, Main, Exploration, bibRecord, 000B55

Salinity modulates thermotolerance, energy metabolism and stress response in amphipods Gammarus lacustris.

Identifieur interne : 000B55 ( Main/Exploration ); précédent : 000B54; suivant : 000B56

Salinity modulates thermotolerance, energy metabolism and stress response in amphipods Gammarus lacustris.

Auteurs : Kseniya P. Vereshchagina [Russie] ; Yulia A. Lubyaga [Russie] ; Zhanna Shatilina [Russie] ; Daria Bedulina [Russie] ; Anton Gurkov [Russie] ; Denis V. Axenov-Gribanov [Russie] ; Boris Baduev [Russie] ; Elizaveta S. Kondrateva [Russie] ; Mikhail Gubanov [Russie] ; Egor Zadereev [Russie] ; Inna Sokolova [Allemagne] ; Maxim Timofeyev [Russie]

Source :

PeerJ [ 2167-8359 ] ; 2016.

RBID : pubmed:27896024

Abstract

Temperature and salinity are important abiotic factors for aquatic invertebrates. We investigated the influence of different salinity regimes on thermotolerance, energy metabolism and cellular stress defense mechanisms in amphipods Gammarus lacustris Sars from two populations. We exposed amphipods to different thermal scenarios and determined their survival as well as activity of major antioxidant enzymes (peroxidase, catalase, glutathione S-transferase) and parameters of energy metabolism (content of glucose, glycogen, ATP, ADP, AMP and lactate). Amphipods from a freshwater population were more sensitive to the thermal challenge, showing higher mortality during acute and gradual temperature change compared to their counterparts from a saline lake. A more thermotolerant population from a saline lake had high activity of antioxidant enzymes. The energy limitations of the freshwater population (indicated by low baseline glucose levels, downward shift of the critical temperature of aerobic metabolism and inability to maintain steady-state ATP levels during warming) was observed, possibly reflecting a trade-off between the energy demands for osmoregulation under the hypo-osmotic condition of a freshwater environment and protection against temperature stress.

DOI: 10.7717/peerj.2657
PubMed: 27896024

Affiliations:

Allemagne, Russie

Le document en format XML

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<front><div type="abstract" xml:lang="en">Temperature and salinity are important abiotic factors for aquatic invertebrates. We investigated the influence of different salinity regimes on thermotolerance, energy metabolism and cellular stress defense mechanisms in amphipods <i>Gammarus lacustris</i>
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Salinity modulates thermotolerance, energy metabolism and stress response in amphipods Gammarus lacustris.

Salinity modulates thermotolerance, energy metabolism and stress response in amphipods Gammarus lacustris.

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Abstract

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