Antioxidant Defense Enzymes Response Following Polychlorinated Biphenyls Exposure to Eisenia fetida in Actual Polluted Soil

Dong Sheng Shen; Xiao Qing Tao; Chen Chao Shen; Jia Li Shentu; Mei Zhen Wang

doi:10.4028/www.scientific.net/AMR.1010-1012.142

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Study on Flotation Separation and Determination of Trace Copper in Water Samples Using Microcrystalline Adsorption System
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Antioxidant Defense Enzymes Response Following Polychlorinated Biphenyls Exposure to Eisenia fetida in Actual Polluted Soil
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Analysis of Antioxidant Properties and Major Components of the Extract of Paulownia tomentosa Steud Flowers
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Antioxidant Defense Enzymes Response Following Polychlorinated Biphenyls Exposure to Eisenia fetida in Actual Polluted Soil

Abstract:

The responses of antioxidant systems after exposing Eisenia fetida to actual soil contaminated with PCBs were investigated. Among antioxidant enzymes, the primary response to early PCBs exposure can be attributed to catalase (CAT) and peroxidase (POD). These two enzymes could have a combined effect on fighting damage by reactive oxygen species. An obvious increase in the activity of CAT was recorded at 4 mg kg^-1 compared to the control throughout the whole test days. PCBs exposure caused changes in POD activity in 2d and 4d. However, the activity of POD in E. fetida tissues changed little with PCBs concentrations in day 8 and 16d. Superoxide dismutase (SOD) changed little with PCBs in different time. The results suggest that the variations in CAT and POD of E. fetida could be used as early responsive biomarkers for oxidative stress caused by PCBs in a soil environment.