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| Cadmium Accumulation and Translocation in Wheat and Grain Cd Prediction |
| Received:March 07, 2015 |
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| KeyWord:cadmium;wheat;bioaccumulation factor;translocation factor |
| Author Name | Affiliation | E-mail | | LIU Ke | College of Natural Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | HE Wen-xiang | College of Natural Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | ZHANG Hong | College of Natural Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | CAO Ying-fei | College of Natural Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | DAI Yun-chao | College of Natural Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | LÜ Jia-long | College of Natural Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | ljlll@nwsuaf.edu.cn |
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| Abstract: |
| Fourteen soil samples, collected from wheat-producing areas across 14 provinces in China, were used in pot experiment to investigate accumulation and translocation of Cd from soil to different parts of wheat with and without Cd addition. Results showed that the Cd content in wheat was in order of rootsb> stems> grains for all tested soils, with Cd content ranges of 0.11~2.18, 0.04~0.75, and 0.004~0.08 mg·kg-1 in no Cd added soils and 3.14~12.04, 0.18~0.94, and 0.09~0.43 mg·kg-1 in Cd added soils, respectively. The Cd content in roots, stems, and grains were all significantly correlated with each other(except between grain and root under Cd addition). The bioaccumulation factor of Cd in roots ranged from 0.59 to 13.69 in the control and from 2.98 to 14.86 in Cd addition. The translocation factors of Cd from roots to stems and grains ranged correspondingly from 0.22~1.60 and 0.02~0.14(the control) and 0.04~0.13 and 0.01~0.06(Cd addition). Soil pH was the most important factor influencing wheat grain Cd uptake, with correlation coefficient of r=-0.828 in control and r=-0.841 in Cd addition. A good prediction model of Cd concentrations in wheat grain was established with R2=0.84(in no Cd addition) and R2=0.93(in Cd addition). |
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