Journal
ENVIRONMENTAL POLLUTION
Volume 192, Issue -, Pages 9-18Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.05.001
Keywords
A. caliginosa; A. chlorotica; Soil pesticide contamination; Biotransformation; Oxidative stress; Adaptation
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Funding
- European University of Brittany via the International Chair of Excellence in Agronomy and Environment
- Institute francais du Danemark
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This study investigates if acclimatization to residual pesticide contamination in agricultural soils is reflected in detoxification, antioxidant enzyme activities and energy budget of earthworms. Five fields within a joint agricultural area exhibited different chemical and farming histories from conventional cultivation to organic pasture. Soil multiresidual pesticide analysis revealed up to 9 molecules including atrazine up to 2.4 ng g(-1) dry soil. Exposure history of endogeic Aporrectodea caliginosa and Allolobophora chlorotica modified their responses to pesticides. In the field, activities of soluble glutathione-S-transferases (sGST) and catalase increased with soil pesticide contamination in A. caliginosa. Pesticide stress was reflected in depletion of energy reserves in A. chlorotica. Acute exposure of pre-adapted and naive A. caliginosa to pesticides (fungicide Opus (R), 0.1 mu g active ingredient epoxiconazole g(-1) dry soil, RoundUp Flash (R), 2.5 mu g active ingredient glyphosate g(-1) dry soil, and their mixture), revealed that environmental pre-exposure accelerated activation of the detoxification enzyme sGST towards epoxiconazole. (C) 2014 Elsevier Ltd. All rights reserved.
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