Journal
ENVIRONMENTAL RESEARCH
Volume 118, Issue -, Pages 47-52Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2012.06.004
Keywords
Seasonal variations; Reduced glutathione; Gammarus roeseli; Biomarkers; Energy reserves
Funding
- French Ministry of Education and Research (Ministere de l'Enseignement Superieur et de la Recherche)
- EC2CO research program (Ecosphere Continentale et Cotiere)
- Zone Atelier Moselle (ZAM, Region Lorraine)
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As biomarkers are known to be influenced by biotic and abiotic factors (e.g. gender, temperature), we investigated over a one-year long sampling period, the influence of season and gender on reduced glutathione concentrations and its synthesis in the crustacean amphipod Gammarus roeseli. At the same time, we assessed energy reserves and malondialdehyde levels as toxic biomarker. Results have shown that, in both genders, reduced glutathione concentrations were inversely correlated to water temperature, and higher in females than in males whatever the season. Total lipid and glycogen contents were higher in females than in males, allowing females to have enough energy to assume the reproductive period and maintain high GSH concentrations for detoxification processes. Conversely, females have lower cell damages than males. These differences between genders could induce differential sensitivity in a contamination context, and thus affect the population. Females could resist better than males in contaminated environments, especially in spring when reduced glutathione concentration is the highest. (c) 2012 Elsevier Inc. All rights reserved.
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