BAUDRIMONT, Magalie; GONZALEZ, Patrice; MESMER-DUDONS, Nathalie; LEGEAY, Alexia

doi:10.1007/s11356-019-05025-0

Environnements et Paléoenvironnements OCéaniques [EPOC]

GONZALEZ, Patrice

Environnements et Paléoenvironnements OCéaniques [EPOC]

MESMER-DUDONS, Nathalie
Environnements et Paléoenvironnements OCéaniques [EPOC]

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Article de revue

Ce document a été publié dans

Environmental Science and Pollution Research. 2020, vol. 27, n° 4, p. 3715-3725

Résumé en anglais

Margaritifera margaritifera is a critically endangered species in Europe. Among the causes explaining its decline, metal pollution had never been deeply studied. Thus, an ecotoxicological investigation was developed on this species which comes from the Dronne River (South-West of France). Cadmium (Cd) exposure of mussels at 2 and 5 μg/L for 7 days was conducted to test their vulnerability to this metal, and also the potential endocrine disruption power of Cd. Morphometric analyses, gonad histological observations, metal bioaccumulation, metallothionein (MTs) production, measures of malondialdehyde (MDA), and finally quantitative relative expression analysis of genes involved in various metabolic functions were performed.The main results showed Cd accumulation increasing in a dose-dependent manner, especially in the gills. The same trend was observed for gene expression relative to oxidative stress. Histological analysis of the gonads highlighted a predominance of hermaphrodite individuals, but after 7 days of exposure to Cd, the percentage of female was largely increased compared with controls, from 17 to 33%. These results demonstrate the endocrine disruption effect of Cd on freshwater pearl mussels.< Réduire

Mots clés en anglais

Margaritifera margaritifera

cadmium

metallothionein

gene expression

endocrine disruption

gonad histology

Margaritifera margaritifera

URI

https://oskar-bordeaux.fr/handle/20.500.12278/187383

DOI

http://dx.doi.org/10.1007/s11356-019-05025-0

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Sensitivity to cadmium of the endangered freshwater pearl mussel Margaritifera margaritifera from the Dronne River (France): experimental exposure

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Résumé en anglais

Mots clés en anglais

URI

DOI

Unités de recherche