Dépôt numérique

Toxic effects of PCDD/Fs mixtures on Eisenia andrei earthworms

Belmeskine, Hayet; Haddad, Sami; Vandelac, Louise; Sauvé, Sebastien et Fournier, Michel (2012). Toxic effects of PCDD/Fs mixtures on Eisenia andrei earthworms Ecotoxicology and Environmental Safety , vol. 80 . pp. 54-59. DOI: 10.1016/j.ecoenv.2012.02.008.

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The earthworms Eisenia andrei were used to study the toxicity of PCDD/Fs mixts. to earthworms during 28 day of exposure. The expts. were performed on artificial soils contaminated with dioxins at levels of C1 (0.1 ng 2, 3, 7, 8-TCDD/g soil), C2 (1 ng 2, 3, 7, 8-TCDD/g soil) and C3 (1.5 ng 2, 3, 7, 8-TCDD/g soil). Effects of PCDD/Fs on survival, growth rate and immune responses; phagocytosis and NK-like cell activity, were detd. No mortality was obsd. at the lowest concn. (C1), while mortalities of 10 and 100% were noted at the highest concns. tested C2 and C3, resp. A significant redn. in growth rate was obtained at C2 and no effects at C1. Addnl., an inhibition of phagocytic activity and efficiency was obsd. at higher concns. In contrast, an enhancement of NK-like cell activity was shown at lower concns. Based on our results, we hypothesize that the PCDD/Fs mixts. tested at levels equal or higher to C2 (1 ng 2378-TCDD/g soil), lead to adverse effects on biotic potential and immune functions in E. andrei earthworms.

Type de document: Article
Mots-clés libres: Dioxins; Soil; Toxicity; Earthworms; Phagocytosis; NK-like cells
Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 06 mars 2024 15:10
Dernière modification: 06 mars 2024 15:10
URI: https://espace.inrs.ca/id/eprint/13988

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