Incorporation of pesticides by soil micro-organisms as a way of bound residues formation

Marie-Paule Charnay (1) , Christian Mougin (2) , Adrien Farrugia (1) , Enrique Barriuso (1)

1 EGC - Environnement et Grandes Cultures
2 UPMC - Unité de recherche Phytopharmacie et Médiateurs Chimiques

We studied the 14C-tagged biochemical compartments such as proteins, lipids and polysaccharides from bacterial and fungal cultures supplied with 14C-pesticides and 14C-glucose. We showed that 14C incorporation depends both on the substrate structure and on the nature of the micro-organism. Both bacterial and fungal cells incorporated glucose 14C mainly into cell wall proteins. By contrast, glyphosate 14C was mainly incorporated into cytoplasm carbohydrates by fungi. On the other hand, 2,4-dichlorophenoxyacetic acid 14C was mainly found in the carbohydrate fractions of the bacteria walls.

Mots clés: Pesticides; Soil; Bound residues; Microflora; soil pollution; soil sciences

Mots clés: pesticide; résidu lie; biologie du sol; biodégradation; pollution du sol; microorganisme du sol; sciences du sol

Domaines: Sciences du Vivant [q-bio]

Marie-Paule Charnay, Christian Mougin, Adrien Farrugia, Enrique Barriuso. Incorporation of pesticides by soil micro-organisms as a way of bound residues formation. Environmental Chemistry Letters, 2004, 2 (1), pp.27-30. ⟨10.1007/s10311-003-0055-2⟩. ⟨hal-01512112⟩