Mechanistic understanding of MeHg-Se antagonism in soil-rice systems: the key role of antagonism in soil
文献类型：期刊论文
| 作者 | Wang, YJ; Dang, F; Evans, RD; Zhong, H; Zhao, JT; Zhou, DM; Zhao JT(赵甲亭)
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| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2016 |
| 卷号 | 6 |
| DOI | 10.1038/srep19477 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Methylmercury (MeHg) accumulation in rice has great implications for human health. Here, effects of selenium (Se) on MeHg availability to rice are explored by growing rice under soil or foliar fertilization with Se. Results indicate that soil amendment with Se could reduce MeHg levels in soil and grain (maximally 73%). In contrast, foliar fertilization with Se enhanced plant Se levels (3-12 folds) without affecting grain MeHg concentrations. This evidence, along with the distinct distribution of MeHg and Se within the plant, demonstrate for the first time that Se-induced reduction in soil MeHg levels (i.e., MeHg-Se antagonism in soil) rather than MeHg-Se interactions within the plant might be the key process triggering the decreased grain MeHg levels under Se amendment. The reduction in soil MeHg concentrations could be mainly attributed to the formation of Hg-Se complexes (detected by TEM-EDX and XANES) and thus reduced microbial MeHg production. Moreover, selenite and selenate were equally effective in reducing soil MeHg concentrations, possibly because of rapid changes in Se speciation. The dominant role of Se-induced reduction in soil MeHg levels, which has been largely underestimated previously, together with the possible mechanisms advance our mechanistic understanding about MeHg dynamics in soil-rice systems. |
| WOS关键词 | ORYZA-SATIVA-L. ; MERCURY UPTAKE ; DESULFOVIBRIO-DESULFURICANS ; METHYL MERCURY ; HG ANTAGONISM ; SELENIUM ; METHYLMERCURY ; CHINA ; BIOAVAILABILITY ; SEDIMENTS |
| 语种 | 英语 |
| WOS记录号 | WOS:000387314400001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/260401]  |
| 专题 | 中国科学院高能物理研究所 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang, YJ,Dang, F,Evans, RD,et al. Mechanistic understanding of MeHg-Se antagonism in soil-rice systems: the key role of antagonism in soil[J]. SCIENTIFIC REPORTS,2016,6. |
| APA | Wang, YJ.,Dang, F.,Evans, RD.,Zhong, H.,Zhao, JT.,...&赵甲亭.(2016).Mechanistic understanding of MeHg-Se antagonism in soil-rice systems: the key role of antagonism in soil.SCIENTIFIC REPORTS,6. |
| MLA | Wang, YJ,et al."Mechanistic understanding of MeHg-Se antagonism in soil-rice systems: the key role of antagonism in soil".SCIENTIFIC REPORTS 6(2016). |
入库方式： OAI收割
来源：高能物理研究所
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