Reducing total mercury and methylmercury accumulation in rice grains through water management and deliberate selection of rice cultivars
Reducing total mercury and methylmercury accumulation in rice grains through water management and deliberate selection of rice cultivars
复制标题
通过水管理和精心选择水稻品种来减少稻米中的总汞和甲基汞积累
DOI：
10.1016/j.envpol.2011.11.024
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发表时间：
2012-03-01
影响因子：
8.9
通讯作者：
Ye, Zhihong
中科院分区：
文献类型：
--
作者：
Peng, Xiaoyan;Liu, Fengjie;Ye, Zhihong
在内陆中国的一些地区，食用大米已被确定为甲基汞暴露的主要途径。我们研究了两种可能的缓解方法(水管理和精心选择水稻品种)来减少谷物中的总汞和甲基汞的含量。有氧种植的水稻显著降低了总汞和甲基汞的浓度，以及谷物中甲基汞的比例要低得多。值得注意的是，生长在同一水稻土壤上的24个品种在籽粒中总汞和甲基汞的浓度以及甲基汞所占的比例都有很大的差异。汞耐性指数(以对照根生长的百分比平均值表示)在不同品种之间也有很大差异。此外，粮食中总汞和甲基汞浓度(P<；0.05)与粮食中甲基汞的比例(P<；0.01)呈负相关。(C)2011爱思唯尔有限公司。保留所有权利。
Rice consumption has been identified as a major route of methylmercury (MeHg) exposure in some areas of inland China. We investigated two potential mitigation methods (water management and deliberate selection of rice cultivars) to reduce the amount of total mercury (Hg) and MeHg within the grain. Rice grown aerobically had markedly reduced total Hg and MeHg concentrations as well as a much lower proportion of MeHg in the grain. Remarkably, there were considerable variations in the total Hg and MeHg concentrations as well as the proportion of MeHg in the grain among the 24 cultivars grown in the same paddy soil. The Hg tolerance index (expressed as % mean of control root growth) also varied substantially among the different cultivars. Furthermore, negative correlations were found between the total Hg and MeHg concentrations (P < 0.05) of grain and the proportion of MeHg in the grain (P < 0.01). (C) 2011 Elsevier Ltd. All rights reserved.