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Excessive sulfur supply reduces cadmium accumulation in brown rice (Oryza sativa L.) |
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| Authors: | Jian-Ling Fan Zheng-Yi Hu Noura Ziadi Cong-Yang-Hui Wu |
| Institution: | a State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71st East Beijing Road, Nanjing 210008, PR China b College of Resources and Environment, Graduate University of Chinese Academy of Sciences, 19A, Yuquan Road, Beijing 100049, China c Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, 2560 Hochelaga Boulevard, Quebec, QC, Canada G1V 2J3 |
| Abstract: | Human activities have resulted in cadmium (Cd) and sulfur (S) accumulation in paddy soils in parts of southern China. A combined soil-sand pot experiment was conducted to investigate the influence of excessive S supply on iron plaque formation and Cd accumulation in rice plants, using two Cd levels (0, 1.5 mg kg−1) combined with three S concentrations (0, 60, 120 mg kg−1). The results showed that excessive S supply significantly decreased Cd accumulation in brown rice due to the decrease of Cd availability and the increase of glutathione in rice leaves. But excessive S supply obviously increased Cd accumulation in roots due to the decrease of iron plaque formation on the root surface of rice. Therefore, excessive S supply may result in loss of rice yield, but it could effectively reduce Cd accumulation in brown rice exposed to Cd contaminated soils. |
| Keywords: | Sulfur Cadmium Oryza sativa L Iron plaque Glutathione |
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