College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
Environ Pollut. 2010 May;158(5):1536-41. doi: 10.1016/j.envpol.2009.12.022. Epub 2010 Jan 4.
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.
食用稻谷（Oryza sativa L.）是东南亚地区摄入无机砷的主要途径。在中国南方的广东省进行了一项多地点调查，以评估两种水稻品种（一种是籼稻，另一种是杂交籼稻）中砷的积累和形态。结果表明，砷在水稻组织中的浓度顺序为：谷粒<稻壳<秸秆<根。两种水稻品种的稻谷砷含量存在显著差异，并与地上部磷浓度和 P/As 摩尔比相关，籼稻品种的含量高于杂交籼稻，这表明改变地上部磷的状态可能是培育低砷稻谷品种的一种有前途的途径。采用高效液相色谱-电感耦合等离子体质谱法（HPLC-ICP-MS）对稻谷中的砷进行形态分析，结果表明无机砷是稻谷中主要的砷形态。
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