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Han, Yingnan; Zhu, Lusheng; Wang, Jinhua; Wang, Jun; Xie, Hui; Zhang, Shumin
Ecotoxicology and environmental safety, 09/2014, Volume: 107Journal Article
Azoxystrobin has been widely used in recent years. The present study investigated the oxidative stress and DNA damage effects of azoxystrobin on earthworms (Eisenia fetida). Earthworms were exposed to different azoxystrobin concentrations in an artificial soil (0, 0.1, 1, and 10mg/kg) and sampled on days 7, 14, 21, and 28. Superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (POD), glutathione-S-transferase (GST), reactive oxygen species (ROS), and malondialdehyde (MDA) content were measured by an ultraviolet spectrophotometer to determine the antioxidant responses and lipid peroxidation. Single cell gel electrophoresis (SCGE) was used to detect DNA damage in the coelomocytes. Compared with these in the controls, earthworms exposed to azoxystrobin had excess ROS accumulation and greater SOD, POD, and GST activity while the opposite trend occurred for CAT activity. MDA content increased after 14-day exposure, and DNA damage was enhanced with an increase in the concentration of azoxystrobin. In conclusion, azoxystrobin caused oxidative stress leading to lipid peroxidation and DNA damage in earthworms. •Azoxystrobin induced oxidative stress and DNA damage in Eisenia fetida.•SOD, POD and GST were all stimulated by azoxystrobin, as opposed to CAT.•Azoxystrobin caused ROS accumulation and lipid peroxidation.•DNA damage increased with increasing azoxystrobin concentration and exposure time.
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