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| Effects of benzotriazole on the uptake and toxicity of cadmium in rapes（Brassica campestris L.） |
| Received:July 08, 2019 |
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| KeyWord:benzotriazole;cadmium;rapes;joint toxicity;exposure sequence;toxicity mechanism |
| Author Name | Affiliation | E-mail | | WANG Jiao | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | ZHAO Shuang | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | DUAN Xin-yue | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | WANG Yu-di | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | QIN Li | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | AN Yi | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | DUAN Zheng-hua | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | duanzhenghua@mail.nankai.edu.cn |
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| Abstract: |
| Rapes(Brassica campestris L.) in hydroponic gardens were tested to investigate the influence of benzotriazole(BTR) on the toxic effect of cadmium(Cd). The changes in growth status, antioxidant enzyme expression, and metallothionein(MT) content of rapes were systematically studied for the first time, and the joint toxicity mechanism was also discussed. The results showed that the growth of rapes could be promoted by Cd at a concentration of 0.1 μmol·L-1, while it could be inhibited at 0.5 μmol·L-1 or higher; the dose-effect relationship was significant(R2=0.779).The expression of the superoxide dismutase(SOD) enzyme in rapes could be significantly induced at a BTR exposure of 1 μmol·L-1, although there was no effect on the growth of the rapes. The morphology of Cd could be changed and bioaccumulation could be reduced by the combined presence of BTR and Cd, leading to differences in growth status and antioxidant enzyme expression, and MT expressions in rapes. The degree of reduction was related to the exposure sequences of Cd and BTR. When BTR was pre-added in rapes, it could promote the accumulation of Cd in stems. |
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