| Effects of zinc on cadmium uptake by spring wheat （Triticum aestivum, L.）： long-time hydroponic study and short-time ^109Cd tracing study |
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| 引用本文： | 赵中秋朱永官,蔡运龙. Effects of zinc on cadmium uptake by spring wheat （Triticum aestivum, L.）： long-time hydroponic study and short-time ^109Cd tracing study[J]. 浙江大学学报(A卷英文版), 2005, 6(7): 643-648. DOI: 10.1007/BF02856167 |
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| 作者姓名： | 赵中秋朱永官 蔡运龙 |
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| 作者单位： | [1]College of Environmental Sciences, Peking University. Beijing 100871. China [2]Research Center for Eco-Environmental Sciences. Chinese Academy of Sciences, Beijing 100085, China |
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| 基金项目： | 中国科学院资助项目,the Recruiting Outstanding Overseas Chinese Scientists Scheme of the Chinese Academy of Sciences |
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| 摘 要： | To investigate effects of Zn on Cd uptake by spring wheat (Triticum aestivum, L.) in solution culture, long-time hydroponic experiment (1 month) (Experiment 1) and short-time Cd isotope (109Cd) tracing experiment (24 h) (Experiment 2) were conducted. In Experiment 1, spring wheat (cv. Brookton) was grown in nutrient solution at uniform cadmium concentration of 20μ mol/L and 10 zinc concentrations (0, 1, 5, 10, 20, 100, 200, 500, 1000, 2000 μ mol/L). In Experiment 2, spring wheat seedlings,pre-cultivated in complete nutrient solution, were treated with 109Cd of uniform activity and the same series of Zn concentrations as those in Experiment 1 for 24 h. Cd concentrations in shoots and roots in Experiment 1 increased marginally but not consistently with Zn increasing at Zn rates of 1～200 μmol/L, and then decreased significantly at high rates (＞200 μ mol/L). In Experiment 2, the response of 109Cd activities in shoots and roots to increasing Zn was greatly similar to the response of Cd concentrations to Zn increasing in Experiment 1. The results of the two experiments indicated that the short-time and long-time exposure of spring wheat to Zn had similar effects on Cd accumulation.
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| 关 键 词： | 春小麦 种植技术 溶液培养实验 杂交技术 |
| 收稿时间： | 2005-01-07 |
| 修稿时间： | 2005-05-20 |
Effects of zinc on cadmium uptake by spring wheat (Triticum aestivum, L.): long-time hydroponic study and short-time109Cd tracing study |
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| Zhao Zhong-qiu,Zhu Yong-guan,Cai Yun-long. Effects of zinc on cadmium uptake by spring wheat (Triticum aestivum, L.): long-time hydroponic study and short-time109Cd tracing study[J]. Journal of Zhejiang University Science, 2005, 6(7): 643-648. DOI: 10.1007/BF02856167 |
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| Authors: | Zhao Zhong-qiu Zhu Yong-guan Cai Yun-long |
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| Affiliation: | 1. College of Environmental Sciences, Peking University, 100871, Beijing, China
2. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085, Beijing, China
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| Abstract: | To investigate effects of Zn on Cd uptake by spring wheat (Triticum aestivum, L.) in solution culture, long-time hydroponic experiment (1 month) (Experiment 1) and short-time Cd isotope (109Cd) tracing experiment (24 h) (Experiment 2) were conducted. In Experiment 1, spring wheat (cv. Brookton) was grown in nutrient solution at uniform cadmium concentration of 20 μmol/L and 10 zinc concentrations (0, 1, 5, 10, 20, 100, 200, 500, 1000, 2000 μmol/L). In Experiment 2, spring wheat seedlings, pre-cultivated in complete nutrient solution, were treated with109Cd of uniform activity and the same series of Zn concentrations as those in Experiment 1 for 24 h. Cd concentrations in shoots and roots in Experiment 1 increased marginally but not consistently with Zn increasing at Zn rates of 1≈200 μmol/L, and then decreased significantly at high rates (>200 μmol/L). In Experiment 2, the response of109Cd activities in shoots and roots to increasing Zn was greatly similar to the response of Cd concentrations to Zn increasing in Experiment 1. The results of the two experiments indicated that the short-time and long-time exposure of spring wheat to Zn had similar effects on Cd accumulation. |
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| Keywords: | Spring wheat Effects of Zn Cd uptake 109Cd tracing |
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