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Biochemical responses of earthworm Eisenia fetida exposed to cadmium-contaminated soil with long duration
journal contribution
posted on 2012-12-01, 00:00 authored by X Yang, Y Song, Leigh AcklandLeigh Ackland, Y Liu, X CaoThe biochemical responses of the earthworms, Eisenia fetida, exposed to a series of Cd concentrations (0.00, 1.25, 2.50, 5.00 and 10.00 mg Cd2+ kg−1 soil) for up to 8 weeks were investigated, aiming to evaluate the sublethal effects of Cd with long exposure and to explore the potential for applying these responses as biomarkers to indicate the Cd-contaminated soil. The following biochemical parameters were determined: cytochrome P450 (CYP) contents and activities of superoxide dismutase (SOD), catalase (CAT) and glutathione-s-transferase (GST). Cadmium concentrations in all earthworms were apparently accumulated in 4 weeks, and showed minor changes in weeks 6–8 compared to the first 4 weeks. CYP presented a significant elevation in 2–4 weeks and a decline in 6–8 weeks in each treated group. The activities of SOD and CAT showed an obvious increase with exposure of 6–8 weeks while their levels were not affected in 4 weeks in each treated group. GST activity revealed significant activation starting from week 4. This study confirmed the significance of applying a suite of biomarkers rather than a selective choice to assess the impact of pollutants on organisms. It also indicated that the observed effects were more dependent upon exposure duration than dose.
History
Journal
Bulletin of environmental contamination and toxicologyVolume
89Issue
6Pagination
1148 - 1153Publisher
Springer New York LLCLocation
New York, N. Y.ISSN
0007-4861eISSN
1432-0800Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2012, SpringerUsage metrics
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