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甲基汞(MeHg)具有较强的神经毒性,在稻谷中积累而产生的健康风险倍受关注。水稻(Oryza sativa L.)中甲基汞主要来源于稻田土壤,土壤中铁硫含量空间变异大,在水稻种植过程中因干湿交替作用以及根系泌氧作用而改变根际环境,使土壤甲基汞的含量及其迁移发生变化,从而影响其植物有效性。本综述系统总结了铁、硫及其相互作用对汞甲基化以及甲基汞在土壤-水稻系统中迁移转化的研究成果,并提出了甲基汞在土壤-水稻系统中迁移转化值得深入探究的相关问题,对进一步研究调控水稻中甲基汞含量以及其调控机制,降低健康风险具有重要意义。
Methylmercury (MeHg) has strong neurotoxicity, attracting much attention for the health risks it accumulates in rice. Methylmercury in rice (Oryza sativa L.) mainly comes from paddy soils, soil iron and sulfur content of large spatial variability in the rice cultivation process due to alternating wet and dry and root oxygenation and change the rhizosphere environment, the soil methyl The level of mercury and its migration change, thus affecting its plant validity. This review systematically summarizes the results of studies on mercury methylation and the migration and transformation of methylmercury in the soil-rice system by iron, sulfur and their interactions and suggests that the migration and transformation of methylmercury in the soil-rice system should be further explored It is of great significance to further study on the regulation of methylmercury content in rice and its regulatory mechanism to reduce the health risks.