| Combined effects of cadmium and fluoranthene on germination, growth and photosynthesis of soybean seedlings |
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| 作者姓名： | Qiushuang Li Yonglong Lu Yajuan Shi Tieyu Wang Kun Ni Li Xu Shijie Liu Lin Wang Qinli Xiong John. P Giesy |
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| 作者单位： | State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan |
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| 基金项目： | supported by the National Natural Science Foundation of China （No. 41071355, 41171394）; the National International Cooperation Program of China （No. 2012DFA91150）; supported by the Einstein Professorship Program of the Chinese Academy of Sciences; the Canada Research Chair Program |
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| 摘 要： | The single and combinational effects of cadmium (Cd) and fluoranthene (FLT) on germination, growth and photosynthesis of soybean seedlings were investigated. Exposure to 5, 10, or 15 mg Cd/L or 1, 5, or 10 mg FLT/L individually or in combination significantly decreased germination vigor (3 days) and final germination rate of soybean seeds, except at 1 and 5 mg FLT/L. The results of two-way ANOVA analysis and the Bliss independence model showed that at lower concentrations of FLT (1 mg/L), the interaction between Cd and FLT on germination was antagonistic, whereas the interaction was synergistic when the concentration of FLT was 5 or 10 mg/L and the concentration of Cd was 15 mg/L. Growth, expressed as dry weight, length of shoot and root, leaf area, and photosynthesis, expressed as net photosynthetic rate, intercellular CO2 concentration, chlorophyll contents and fluorescence of soybean seedlings were also reduced by exposure to 5 or 10 mg Cd/L or 1 or 5 mg FLT/L, singly or jointly. Significant antagonistic effects of exposure to 5 or 10 mg Cd/L or 1 or 5 mg FLT/L on shoot growth and photosynthesis were observed, whereas synergy and antagonism of Cd and FLT were both observed for root growth.
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| 关 键 词： | synergism antagonism metal PAH photosynthesis plant toxicity |
| 收稿时间： | 25 December 2012 |
| 修稿时间： | 2/6/2013 12:00:00 AM |
Combined effects of cadmium and fluoranthene on germination, growth and photosynthesis of soybean seedlings |
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| Qiushuang Li,Yonglong Lu,Yajuan Shi,Tieyu Wang,Kun Ni,Li Xu,Shijie Liu,Lin Wang,Qinli Xiong,John. P Giesy.Combined effects of cadmium and fluoranthene on germination, growth and photosynthesis of soybean seedlings[J].Journal of Environmental Sciences,2013,25(9):1936-1946. |
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| Authors: | Qiushuang Li Yonglong Lu Yajuan Shi Tieyu Wang Kun Ni Li Xu Shijie Liu Lin Wang Qinli Xiong and John P Giesy |
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| Institution: | [1]State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China [2]University of Chinese Academy of Sciences, Beijing 100039, China [3]Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Canada |
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| Abstract: | The single and combinational effects of cadmium (Cd) and fluoranthene (FLT) on germination, growth and photosynthesis of soybean seedlings were investigated. Exposure to 5, 10, or 15 mg Cd/L or 1, 5, or 10 mg FLT/L individually or in combination significantly decreased germination vigor (3 days) and final germination rate of soybean seeds, except at 1 and 5 mg FLT/L. The results of two-way ANOVA analysis and the Bliss independence model showed that at lower concentrations of FLT (1 mg/L), the interaction between Cd and FLT on germination was antagonistic, whereas the interaction was synergistic when the concentration of FLT was 5 or 10 mg/L and the concentration of Cd was 15 mg/L. Growth, expressed as dry weight, length of shoot and root, leaf area, and photosynthesis, expressed as net photosynthetic rate, intercellular CO2 concentration, chlorophyll contents and fluorescence of soybean seedlings were also reduced by exposure to 5 or 10 mg Cd/L or 1 or 5 mg FLT/L, singly or jointly. Significant antagonistic effects of exposure to 5 or 10 mg Cd/L or 1 or 5 mg FLT/L on shoot growth and photosynthesis were observed, whereas synergy and antagonism of Cd and FLT were both observed for root growth. |
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| Keywords: | synergism antagonism metal PAH photosynthesis plant toxicity |
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