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Evaluation of genotoxicity of combined soil pollution by cadmium and imidacloprid

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Abstract

Cadmium (Cd) is one of the important pollutants of soil and the genotoxicity of Cd-contaminated soil was studied in combination with imidacloprid. The single cell gel electrophoresis or comet assay was used to quantify DNA strand breaks as a measure of DNA damage induced by Cd and imidacloprid contamination in soil. The soil was artificially contaminated by Cd (0.0, 0.2, 0.5, 1.0, 2.0 mg· kg−1 dry soil) or Cd (0.0, 0.2, 0.5, 1.0, 2.0 mg · kg−1 dry soil) and imidacloprid (0.5 mg · kg−1 dry soil). Roots ofVicia faba were exposed to the contaminated soil for 2 h at 25°C and were used in the comet assay. DNA damage was measured as the values of percentage of nuclei with tails, tail length, tail DNA, tail moment (TM), and Olive tail moment (OTM). DNA damages of root tips ofVicia faba increased after Cd treatment and there were dose-related increases in DNA damage measured as these parameters. However, the addition of imidacloprid further increased the DNA damage. These data confirmed the genotoxic effect of Cd to plants, and that the combined pollution with imidacloprid can enhance the genotoxicity of Cd.

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Authors and Affiliations

  1. Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 100085, Beijing, China

    Lin Aijun, Yongguan Zhu & Yiping Tong

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  1. Lin Aijun
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  2. Yongguan Zhu
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  3. Yiping Tong
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Correspondence to Yongguan Zhu.

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Lin, A., Zhu, Y. & Tong, Y. Evaluation of genotoxicity of combined soil pollution by cadmium and imidacloprid. Sci. China Ser. C.-Life Sci. 48 (Suppl 1), 7–13 (2005). https://doi.org/10.1007/BF02889796

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  • DOI: https://doi.org/10.1007/BF02889796

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