Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Oxidoreductases provide a more generic response to metallic stressors (Cu and Cd) than hydrolases in soil fungi: new ecotoxicological insights

Abstract : The present study investigates the effect of metals on the secretion of enzymes from12 fungal strains maintained in liquid cultures. Hydrolases (acid phosphatase, β-glucosidase, β-galactosidase, and N-acetyl-β-glucosaminidase) and ligninolytic oxidoreductases (laccase, Mn, and lignin peroxidases) activities, as well as biomass production, were measured in culture fluids from fungi exposed to Cu or Cd. Our results showed that all fungi secreted most of the selected hydrolases and that about 50 % of them produced a partial oxidative system in the absence of metals. Then, exposure of fungi to metals led to the decrease in biomass production. At the enzymatic level, Cu and Cd modified the secretion profiles of soil fungi. The response of hydrolases to metals was contrasted and complex and depended on metal, enzyme, and fungal strain considered. By contrast, the metals always stimulated the activity of ligninolytic oxidoreductases in fungal strains. In some of them, oxidoreductases were specifically produced following metal exposure. Fungal oxidoreductases provide a more generic response than hydrolases, constituting thus a physiological basis for their use as biomarkers of metal exposure in soils.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01532517
Déposant : Archive Ouverte Prodinra <>
Soumis le : vendredi 2 juin 2017 - 20:02:12
Dernière modification le : mercredi 27 mai 2020 - 13:40:05

Identifiants

Citation

Jérémie D. Lebrun, Nathalie Demont-Caulet, Nathalie Cheviron, Karine Laval, Isabelle Trinsoutrot-Gattin, et al.. Oxidoreductases provide a more generic response to metallic stressors (Cu and Cd) than hydrolases in soil fungi: new ecotoxicological insights. Environmental Science and Pollution Research, Springer Verlag, 2016, 23 (4), pp.3036-3041. ⟨10.1007/s11356-015-5145-8⟩. ⟨hal-01532517⟩

Partager

Métriques

Consultations de la notice

302