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Selenium inhibits the phytotoxicity of mercury in garlic (Allium sativum)
Zhao JT(赵甲亭); Gao YX(高愈希);  Li YF(李玉锋);  Zhao, JT; Gao, YX; Li, YF; Hu, Y; Peng, XM; Dong, YX; Li, B; Chen, CY; Chai, ZF; Hu Y(胡毅);  Peng XM(彭晓敏);  Li B(李柏);  Chen CY(陈春英);  Chai ZF(柴之芳)
2013
发表期刊ENVIRONMENTAL RESEARCH
卷号125期号:SI页码:75-81
摘要To investigate the influence of selenium on mercury phytotoxicity, the levels of selenium and mercury were analyzed with inductively coupled plasma-mass spectrometry (ICP-MS) in garlic tissues upon exposure to different dosages of inorganic mercury (Hg2+) and selenite (SeO32-) or selenate (SeO42-). The distributions of selenium and mercury were examined with micro-synchrotron radiation X-ray fluorescence (mu-SRXRF), and the mercury speciation was investigated with micro-X-ray absorption near edge structure (mu-XANES). The results show that Se at higher exposure levels (> 1 mg/L of SeO32- or SeO42-) would significantly inhibit the absorption and transportation of Hg when Hg2+ levels are higher than 1 mg/L in culture media. SeO32- and SeO42- were found to be equally effective in reducing Hg accumulation in garlic. The inhibition of Hg uptake by Se correlates well with the influence of Se on Hg phytotoxicity as indicated by the growth inhibition factor. Elemental imaging using mu-SRXRF also shows that Se could inhibit the accumulation and translocation of Hg in garlic. mu-XANES analysis shows that Hg is mainly present in the forms of Hg-S bonding as Hg(GSH)(2) and Hg(Met)(2). Se exposure elicited decrease of Hg-S bonding in the form of Hg(GSH)(2), together with Se-mediated alteration of Hg absorption, transportation and accumulation, may account for attenuated Hg phytotoxicity by Se in garlic. (C) 2013 Elsevier Inc. All rights reserved.
关键词Mercury Selenium Phytotoxicity Antagonism Garlic
学科领域Environmental Sciences & Ecology; Public, Environmental & Occupational Health
DOI10.1016/j.envres.2013.01.010
收录类别SCI
WOS记录号WOS:000323405000010
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223823
专题院士
多学科研究中心
推荐引用方式
GB/T 7714
Zhao JT,高愈希;李玉锋;Zhao, JT,Gao, YX,et al. Selenium inhibits the phytotoxicity of mercury in garlic (Allium sativum)[J]. ENVIRONMENTAL RESEARCH,2013,125(SI):75-81.
APA 赵甲亭.,高愈希;李玉锋;Zhao, JT.,Gao, YX.,Li, YF.,Hu, Y.,...&胡毅;彭晓敏;李柏;陈春英;柴之芳.(2013).Selenium inhibits the phytotoxicity of mercury in garlic (Allium sativum).ENVIRONMENTAL RESEARCH,125(SI),75-81.
MLA 赵甲亭,et al."Selenium inhibits the phytotoxicity of mercury in garlic (Allium sativum)".ENVIRONMENTAL RESEARCH 125.SI(2013):75-81.
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