Impact du diuron et du S-métolachlore sur la diatomée d'eau douce Gomphonema gracile : Complémentarité entre profils d'acides gras et différents types d'indicateurs écotoxicologiques

DEMAILLY, Floriane; ELFEKY, I.; MALBEZIN, L.; LE GUÉDARD, M.; EON, M.; BESSOULE, Jean-Jacques; FEURTET-MAZEL, Agnes; DELMAS, François; MAZZELLA, Nicolas; GONZALEZ, Patrice; MORIN, Soizic

doi:10.1016/j.scitotenv.2019.06.347

Ecosystèmes aquatiques et changements globaux [UR EABX]

ELFEKY, I.
Ecosystèmes aquatiques et changements globaux [UR EABX]

MALBEZIN, L.
Environnements et Paléoenvironnements OCéaniques [EPOC]

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Article de revue

Ce document a été publié dans

Science of the Total Environment. 2019, vol. 688, p. 960-969

Résumé en anglais

Fatty acids (FA) are crucial for the maintenance of membrane ﬂuidity and play a central role in metabolic energy storage. Polyunsaturated fatty acids play an essential ecological role since they are key parameters in the nutritional value of algae. Pesticide impacts on fatty acid proﬁles have been documented in marine microalgae, but remain understudied in freshwater diatoms. The aims of this study were to: 1) investigate the impact of diuron and S-metolachlor on "classical descriptors" (photosynthesis, growth rate, pigment contents, and on the expression levels of target genes in freshwater diatoms), 2) examine the impact of these pesticides on diatom fatty acid proﬁles and ﬁnally, 3) compare fatty acid proﬁles and "classical descriptor" responses in order to evaluate their complementarity and ecological role. To address this issue, the model freshwater diatom Gomphonema gracile was exposed during seven days to diuron and S-metolachlor at 10 µg.L.< Réduire

Mots clés

ECOTOXICOLOGIE

EAU DOUCE

DIATOMEE

ACIDE GRAS

DIURON

Mots clés en anglais

freshwater

diuron

fatty acids

diatom

ecotoxicology

URI

https://oskar-bordeaux.fr/handle/20.500.12278/188463

DOI

http://dx.doi.org/10.1016/j.scitotenv.2019.06.347

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