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| Effects of Selenium Foliar Spray on Subcellular Distribution and Chemical Forms of Cadmium in Rice Seedlings in Different Sulfur Concentrations |
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| KeyWord:sulfur; foliar spraying selenium; cadmium; subcellular distribution; chemical forms |
| Author Name | Affiliation | | ZHANG Wen | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science & Technology, Shanghai 200237, China | | LIN Kuang-fei | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science & Technology, Shanghai 200237, China | | ZHOU Jian | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science & Technology, Shanghai 200237, China | | ZHANG Wei | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science & Technology, Shanghai 200237, China | | LIU Li-li | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science & Technology, Shanghai 200237, China | | ZHANG Qian-qian | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science & Technology, Shanghai 200237, China |
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| Abstract: |
| Cadmium（Cd） is a toxic heavy metal to rice. Sulfur（S） and selenium（Se） may alleviate its toxicity by changing Cd distribution and species in rice seedlings. Here, we investigated the subcellular distribution and chemical forms of Cd in rice seedlings under different S concentrations and foliar-applied Se using hydroponic experiment. The proportion of Cd in cell wall was larger under 10 mg Cd·L-1 than under 1 mg Cd·L-1. As solution S and foliar-sprayed Se increased, soluble Cd increased while Cd in cell wall decreased, indicating the enhanced translocation of Cd to vacuole by the supply of S and Se. Also, the percentage of NaCl-extraction Cd fraction increased while that of ethanol-extractable Cd decreased with increasing supplies of S and Se, illustrating that the presence of S and Se could promote Cd transfer to less active forms. However, Se supply did not significantly increase Cd transfer into the vacuole and NaCl-extractable fraction under high S concentrations, implying competition between S and Se. |
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