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| Effects of copper nanoparticles on seed germination and physiological and biochemical characteristics of Brassica chinensis L. |
| Received:February 24, 2020 |
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| KeyWord:copper nanoparticles;inhibition rate;Cu content;germination;enzyme activity |
| Author Name | Affiliation | E-mail | | FU Yu-tong | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | SUN Tong | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | WANG Lin | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | XU Ying-ming | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIANG Xue-feng | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | SUN Yue-bing | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | sunyuebing@aepi.org.cn |
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| Abstract: |
| A paper-bed culture experiment was conducted to investigate the effects of different dosages (1, 2, 4, 6, 8 mg·L-1, and 10 mg·L-1)of copper nanoparticles (Cu NPs)on Brassica chinensis L., including seed germination, Cu content in seedlings, the microscopic characteristics of root cells, and physio-chemical characteristics. The results showed that Cu NPs had no significant effect on the seed germination rate (P>0.05). The root and shoot elongation of Brassica chinensis L. increased first and then decreased with the increase of Cu NPs content. The inhibition rate of Brassica chinensis L. root elongation was 10.7%~59.9% under the treatment of 2~10 mg·L-1 Cu NPs. The inhibition rate of Brassica chinensis L. shoots was significantly decreased when the amount of Cu NPs reached 4 mg·L-1, exhibiting a 4.8%~15.8% reduction in contrast with the control. The Cu content in Brassica chinensis L. seedlings increased with the increase of Cu NPs concentration. Transmission electron microscopy showed that the addition of 10 mg·L-1 Cu NPs resulted in a common wall separation of root cells. Compared with the control group, the activity of superoxide dismutase decreased by 4.5%~64.0% under the treatments of Cu NPs (except for 1 mg·L-1 Cu NPs); the peroxidase activity was inhibited by 4.4%~59.3%. However, catalase activity had no significant differences among the addition of Cu NPs (P>0.05). Therefore, the physiological and biochemical characteristics of Brassica chinensis L. vary in response to the doses of Cu NPs. |
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