The concentration of selenium matters: a field study on mercury accumulation in rice by selenite treatment in qingzhen, Guizhou, China
Li YF(李玉锋); Zhao JT(赵甲亭); Li YY(李云云); Li HJ(李汉军); Li B(李柏); Gao YX(高愈希); Li, YF; Zhao, JT; Li, YY; Li, HJ; Zhang, JF; Li, B; Gao, YX; Chen, CY; Luo, MY; Huang, R; Li, J
刊名PLANT AND SOIL
2015
卷号391期号:1-2页码:195-205
关键词Rice Mercury Selenium XRF XAS Seed setting rate Thousand seed weight
学科分类Agriculture; Plant Sciences
DOI10.1007/s11104-015-2418-4
通讯作者李玉锋
文章类型Article
英文摘要Aims The consumption of rice grain produced in mercury (Hg) contaminated soil was identified as a major route of dietary Hg exposure. The aims were 1) to determine the most suitable concentration of Se that can lead to least Hg accumulation in rice grain in real Hg contaminated paddy field in Qingzhen, and 2) to elucidate the possible mechanism of the protection against the phytotoxicity of Hg in rice by Se. Methods Rice plants were treated with different concentrations (0, 0.01, 0.1, 0.5, 1 and 5 mu g/mL) of sodium selenite in a real paddy field in Qingzhen, Guizhou, China. The concentrations of Hg and Se in soil, stream water, rice tissues, and the seed setting rate (SSR) and thousand seed weight (TSW) were checked. The distribution and chemical forms of Hg and Se in rice root were studied by XRF and XAS. Results Treating the rice plants with 0.5 mu g/mL of sodium selenite achieved the lowest Hg accumulation in rice grain while the highest SSR and TSW. In rice root, XRF found decreased Hg uptake, and XAS found Hg-Se complexes were formed. These findings, together with the formation of biological barriers like iron plaque, could explain the decreased accumulation of Hg in rice grain at Se levels below 0.5 mu g/mL. Se concentrations over 0.5 mu g/mL led to increased Hg accumulation and decreased SSR and TSW, which were ascribed to the significantly increased Se accumulation in rice grain. Conclusions This field study suggest that treatment with appropriate level of Se (0.5 mu g/mL in this study) is an efficient way to reduce Hg accumulation in rice and increase rice yield and quality, thereafter to protect the health of the rice-dependent populations in Hg-contaminated area.
类目[WOS]Agronomy ; Plant Sciences ; Soil Science
收录类别SCI ; CA
WOS记录号WOS:000354197100014
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228516
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_实验物理中心
中国科学院高能物理研究所_多学科研究中心
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Li YF,Zhao JT,Li YY,et al. The concentration of selenium matters: a field study on mercury accumulation in rice by selenite treatment in qingzhen, Guizhou, China[J]. PLANT AND SOIL,2015,391(1-2):195-205.
APA 李玉锋.,赵甲亭.,李云云.,李汉军.,李柏.,...&Li, J.(2015).The concentration of selenium matters: a field study on mercury accumulation in rice by selenite treatment in qingzhen, Guizhou, China.PLANT AND SOIL,391(1-2),195-205.
MLA 李玉锋,et al."The concentration of selenium matters: a field study on mercury accumulation in rice by selenite treatment in qingzhen, Guizhou, China".PLANT AND SOIL 391.1-2(2015):195-205.
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