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| Toxic effects and mechanisms of PFOS on the growth of rape (Brassica campestris L.) |
| Received:May 15, 2017 |
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| KeyWord:PFOS;rape;growth;soil enzyme activity;toxicity |
| Author Name | Affiliation | E-mail | | QIN Li | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | AN Yi | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | HAN Jian-hua | Tianjin Agro-Environment Monitoring Station, Tianjin 300061, China | | | CHEN Li | Chongqing Agricultural Ecology and Resource Protection Station, Chongqing 401121, China | | | WANG Wei | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | PAN Jiong | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | CHEN Geng-ni | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, 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: |
| To determine the toxic effects of perfluorooctane sulfonate (PFOS) on rape (Brassica campestris L.), the effects and mechanisms of PFOS on rape germination and growth, combined with changes of soil enzyme activities were studied using potted plants. The results showed a non-monotonic dose-response relationship between PFOS exposure concentrations and rape germination rates and stem length. At < 50 mg·kg-1 PFOS concentrations, the germination rates and stem length increased by 9.24% (P=0.001) and 47.97% (P<0.001), respectively. Concentrations that inhibited rape germination and stem growth were 100 mg·kg-1 and 250 mg·kg-1 PFOS, respectively. However, with increased PFOS concentrations, rape germination and stem growth did not change significantly. Soil sucrose and alkaline protease activities increased with low PFOS doses and were inhibited by high PFOS doses, and were positively correlated with rape growth. Therefore, PFOS toxicity directly affected rape germination and growth, and influenced the planting soil fertility. |
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