Mutual detoxification of mercury and selenium in unicellular Tetrahymena
文献类型：期刊论文
| 作者 | Shi, Jian-bo; Liu, Cheng-bin; Zhang, Li; Wu, Qi; Qu, Guang-bo; Yin, Yong-guang; Hu, Li-gang; Jiang, Gui-bin
|
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 68页码:143-150 |
| 关键词 | Mercury Selenium Antagonism Mutual detoxification Species |
| ISSN号 | 1001-0742 |
| 文献子类 | Article |
| 英文摘要 | Selenium (Se) is commonly recognized as a protective element with an antagonistic effect against mercury (Hg) toxicity. However, the mechanisms of this Hg-Se antagonism are complex and remain controversial. To gain insight into the Hg-Se antagonism, a type of unicellular eukaryotic protozoa (Tetrahymena malaccensis, T. malaccensis) was selected and individually or jointly exposed to two Hg and three Se species. We found that Se species showed different toxic effects on the proliferation of T. malaccensis with the toxicity following the order: selenite (Se(IV)) > selenomethionine (SeMeth) > selenate (Se(VI)). The Hg-Se antagonism in Tetrahymena was observed because the joint toxicity significantly decreased under co-exposure to highly toxic dosages of Hg and Se versus individual toxicity. Unlike Se(IV) and Se(VI), non-toxic dosage of SeMeth significantly decreased the Hg toxicity, revealing the influence of the Se species and dosages on the Hg-Se antagonism. Unexpectedly, inorganic divalent Hg (Hg2+) and monomethylmercury (MeHg) also displayed detoxification towards extremely highly toxic dosages of Se, although their detoxifying efficiency was discrepant. These results suggested mutual Hg-Se detoxification in T. malaccensis, which was highly dependent on the dosages and species of both elements. As compared to other species, SeMeth and MeHg promoted the Hg-Se joint effects to a higher degree. Additionally, the Hg contents decreased for all the Hg-Se co-exposed groups, revealing a sequestering effect of Se towards Hg in T. malaccensis. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40994]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Shi, Jian-bo,Liu, Cheng-bin,Zhang, Li,et al. Mutual detoxification of mercury and selenium in unicellular Tetrahymena[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2018,68:143-150. |
| APA | Shi, Jian-bo.,Liu, Cheng-bin.,Zhang, Li.,Wu, Qi.,Qu, Guang-bo.,...&Jiang, Gui-bin.(2018).Mutual detoxification of mercury and selenium in unicellular Tetrahymena.JOURNAL OF ENVIRONMENTAL SCIENCES,68,143-150. |
| MLA | Shi, Jian-bo,et al."Mutual detoxification of mercury and selenium in unicellular Tetrahymena".JOURNAL OF ENVIRONMENTAL SCIENCES 68(2018):143-150. |
入库方式： OAI收割
来源：生态环境研究中心
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