Variations and constancy of mercury and methylmercury accumulation in rice grown at contaminated paddy field sites in three Provinces of China
Variations and constancy of mercury and methylmercury accumulation in rice grown at contaminated paddy field sites in three Provinces of China
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中国三省污染稻田稻米中汞和甲基汞积累的变化和恒定性
DOI：
10.1016/j.envpol.2013.06.021
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发表时间：
2013-10-01
影响因子：
8.9
通讯作者：
Ye, Z. H.
中科院分区：
文献类型：
--
作者：
Li, B.;Shi, J. B.;Ye, Z. H.
我国矿区的许多稻田都受到汞污染。以26个水稻品种和3个汞污染稻田为材料，研究了不同地点糙米（籽粒）中总汞（THg）和甲基汞（MeHg）累积量的差异和相似性。我们的研究结果揭示了油菜品种在种子中THg（万山13-52 ng g（-1））和MeHg（3.5-23 ng g（-1））积累和% MeHg（17.7-89%）方面的差异。转运能力是影响种子中THg和MeHg水平的重要因素。品种THg积累在不同地点趋于稳定。在汞污染严重的农田中，部分品种的种子中积累了较低浓度的THg和MeHg。目前的研究结果表明，适当的品种选择是一种可能的方式来减少汞污染地区种植的水稻种子中的THg和甲基汞的积累。(C)2013爱思唯尔有限公司保留所有权利。
Many paddy fields have been contaminated by mercury (Hg) in mining areas of China. In this study, twenty-six rice cultivars and three Hg contaminated paddy fields in different geographic regions were selected for field trials and aimed to investigate the variations and similarities in total Hg (THg) and methylmercury (MeHg) accumulations in brown rice (seeds) across sites. Our results revealed widescale cultivar variation in THg (13-52 ng g(-1) at Wanshan) and MeHg (3.5-23 ng g(-1)) accumulation and % MeHg (17.7-89%) in seeds. The ability to translocate is an important factor in the levels of THg and MeHg in seed. Cultivar tended to stability in THg accumulation across sites. Some cultivars accumulated lower concentrations of both THg and MeHg in seeds at fields seriously contaminated by Hg. Present results suggest that appropriate cultivar selection is a possible way to reduce THg and MeHg accumulation in seeds of rice grown in Hg-contaminated regions. (C) 2013 Elsevier Ltd. All rights reserved.