Arsenate toxicity and stress responses in the freshwater ciliate Tetrahymena pyriformis
文献类型：期刊论文
| 作者 | Zhang, Yong-Yu ; Yang, Jun ; Yin, Xi-Xiang ; Yang, Su-Ping ; Zhu, Yong-Guan |
| 刊名 | Microbiology
 |
| 出版日期 | 2012 |
| 卷号 | 48期号:3页码:227-236 |
| 关键词 | Arsenate toxicity Tetrahymena pyriformis Biomethylation Proteomics |
| ISSN号 | 0932-4739 |
| 中文摘要 | The arsenic metabolism in different biological organisms has been studied extensively. However, little is known about protozoa. Herein, we investigated the cell stress responses of the freshwater ciliate Tetrahymena pyriformis to arsenate toxicity. An acute toxicity assay revealed an 18-h EC50 arsenate concentration of ca. 40 mu M, which caused significant changes in the cell shape, growth and organism mobility. Whereas, under exposure to 30 mu M arsenate, T pyriformis could grow reasonably well, indicating a certain resistance of this organism. Arsenic speciation analysis revealed that 94-98% of the total arsenate in cells of T pyriformis could be transformed to monomethylarsonic acid, dimethylarsinic acid and a small proportion of arsenite after 18 h of arsenate exposure, thus indicating the major detoxification pathway by arsenic oxidation/reduction and biomethylation. Finally, comparative proteomic analysis unveiled significant changes in the expression of multiple proteins involved in anti-oxidation, sugar and energy metabolism, proteolysis, and signal transduction. Our results revealed multiple pathways of arsenate detoxification in T pyriformis, and indicated that protozoa may play important roles in the biogeochemical cycles of arsenic. (C) 2012 Elsevier GmbH. All rights reserved. |
| WOS记录号 | WOS:000306880900009 |
| 公开日期 | 2014-11-28 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/8198]  |
| 专题 | 生态环境研究中心_土壤环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Yong-Yu,Yang, Jun,Yin, Xi-Xiang,et al. Arsenate toxicity and stress responses in the freshwater ciliate Tetrahymena pyriformis[J]. Microbiology,2012,48(3):227-236. |
| APA | Zhang, Yong-Yu,Yang, Jun,Yin, Xi-Xiang,Yang, Su-Ping,&Zhu, Yong-Guan.(2012).Arsenate toxicity and stress responses in the freshwater ciliate Tetrahymena pyriformis.Microbiology,48(3),227-236. |
| MLA | Zhang, Yong-Yu,et al."Arsenate toxicity and stress responses in the freshwater ciliate Tetrahymena pyriformis".Microbiology 48.3(2012):227-236. |
入库方式： OAI收割
来源：生态环境研究中心
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