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Author(s): |
Zhen He, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China.
Xiaojing Hu, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China.
Wen Mu, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China.
Qiaoqiao Zhou, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China.
Can Zhan, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China.
Xue Yang, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China.
Li Xiong, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China.
Deli Liu, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Huazhong Normal University, Wuhan 430079, China. |
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Abstract: |
Melamine is an organic base and a trimer of cyanamide, with a 1,3,5-triazine skeleton or simply, it’s an azocyclo-containing organic compound, and traditionally used in the chemical and sporadically mixed into animal feeds to boost protein content. This study was designed to test the melamine toxicity effects on aquatic ecosystem. S.obliquus was exposed to series melamine concentrations (0, 50, 200, 750 mg·L-1). The growth rate, super oxidase dismutase (SOD), photosynthetic pigments, free malondialdehyde (MDA) contents of S.obliquus were measured after 7d exposure. Melamine concentration of 50, 200mg·L-1 caused a significant increase in growth and photosynthetic pigments contents. The SOD activities of S. obliquus were stimulated first and then inhibited with the increasing of melamine concentrations, and reached the peak in 200mg·L-1 (compared with the control, p<0.05). The contents of MDA were inhibited significantly under moderate and high concentration (50, 200, 750 mg·L-1) of melamine.This study indicates that, SOD was sensitive to melamine exposure and can be used as a potential biomarker for risk assessment of aquatic ecosystem safety.
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