水稻砷的吸收机理及阻控对策

Mechanisms of Arsenic Uptake by Rice and Mitigation Strategies

水稻积累砷的能力较其他农作物强,稻米是我国人群从食品中摄入无机砷的主要来源,降低稻米砷含量对增进农产品质量安全有重要意义。本文阐述了稻田砷的生物地球化学转化特征及水稻对不同形态砷的吸收、运输与储存机理,提出阻控稻米砷积累的对策,并讨论了需要进一步研究的问题。

Rice has a greater ability to accumulate arsenic in the grain than other cereal crops. Consumption of rice constitutes a major dietary source of inorganic arsenic for the population in China. Decreasing arsenic ac- cumulation in rice is of great importance to food safety. Here, the biogeochemical transformations of arsenic in the paddy environment and the mechanisms of arsenic uptake, transport and storage in rice are reviewed. Strategies to mitigate excessive arsenic accumulation in rice are discussed. Knowledge gaps are also identified.