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Arsenic accumulation and phosphorus status in two rice (Oryza sativa L.) cultivars surveyed from fields in South China |
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| Authors: | Ying Lu Fei Dong Huo-jun Chen Andrew A Meharg |
| Institution: | a College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China b School of Biological Science, University of Aberdeen, Aberdeen AB24 3UU, UK c Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK |
| Abstract: | The consumption of paddy rice (Oryza sativa L.) is a major inorganic arsenic exposure pathway in S.E. Asia. A multi-location survey was undertaken in Guangdong Province, South China to assess arsenic accumulation and speciation in 2 rice cultivars, one an Indica and the other a hybrid Indica. The results showed that arsenic concentrations in rice tissue increased in the order grain < husk < straw < root. Rice grain arsenic content of 2 rice cultivars was significant different and correlated with phosphorus concentration and molar ratio of P/As in shoot, being higher for the Indica cultivar than for the hybrid Indica, which suggests altering shoot phosphorus status as a promising route for breeding rice cultivars with reduced grain arsenic. Speciation of grain arsenic, performed using HPLC-ICP-MS, identified inorganic arsenic as the dominant arsenic species present in the rice grain. |
| Keywords: | Arsenic China Grain Phosphorus Rice |
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