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Accumulation of total mercury and methylmercury in rice plants collected from different mining areas in China

机译：从中国不同矿区采集的水稻植株中总汞和甲基汞的积累

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A total of 155 rice plants were collected from ten mining areas in three provinces of China (Hunan, Guizhou and Guangdong), where most of mercury (Hg) mining takes place in China. During the harvest season, whole rice plants were sampled and divided into root, stalk 82 leaf, husk and seed (brown rice), together with soil from root zone. Although the degree of Hg contamination varied significantly among different mining areas, rice seed showed the highest ability for methylmercury (MeHg) accumulation. Both concentrations of total mercury (THg) and MeHg in rice plants were significantly correlated with Hg levels in soil, indicating soil is still an important source for both inorganic mercury (IHg) and MeHg in rice plants. The obvious discrepancy between the distribution patterns of THg and MeHg reflected different pathways of IHg and MeHg accumulation. Water soluble Hg may play more important role in MeHg accumulation in rice plants. (C) 2013 Elsevier Ltd. All rights reserved.
机译：在中国三个省（湖南，贵州和广东）的十个矿区中，总共收集了155种稻米植物，其中大部分的汞（Hg）开采都在中国进行。在收获季节，对全稻植物进行采样，并将其与根区的土壤一起分为根，茎82叶，稻壳和种子（糙米）。尽管不同矿区的汞污染程度差异很大，但水稻种子显示出最高的甲基汞（MeHg）积累能力。水稻植物中总汞（THg）和MeHg的浓度均与土壤中的汞含量显着相关，这表明土壤仍然是水稻植物中无机汞（IHg）和MeHg的重要来源。 THg和MeHg的分布模式之间的明显差异反映了IHg和MeHg积累的不同途径。水溶性汞在水稻植株中甲基汞的积累中可能起更重要的作用。 （C）2013 Elsevier Ltd.保留所有权利。

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