中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Effects of microcystins on and toxin degradation by Poterioochromonas sp.

文献类型:期刊论文

作者Ou, DY; Song, LR; Gan, NQ; Chen, W
刊名ENVIRONMENTAL TOXICOLOGY
出版日期2005-06-01
卷号20期号:3页码:373-380
关键词microcystins toxicology biodegradation Poterioochromonas
ISSN号1520-4081
英文摘要A Chrysophyceae species, Poterioochromonas sp., was isolated from Microcystis cultures. This species can efficiently prey on Microcystis and can grow faster phagotrophically than autotrophically. The growth of Poterioochromonas sp. was stimulated in the presence of microcystin-LR and microcystin-RR (in concentrations ranging from 0.1 to 4 mg/L). The growth rate of Poterioochromonas was 4-5 times higher than the control, indicating the toxins serve as growth stimuli for this organism. A subculture of toxin-treated cells, however, showed low cellular viability, suggesting that growth enhancement by microcystins was not a normal process. The antioxidant enzymatic activity of Poterioochromonas sp. was screened for toxicology analysis. Glutathione; malondialdehyde, and superoxide dismutase (SOD) content was up-regulated within,8 h of exposure to microcystin-LR (500 mu g/L). A high level of SOD activity during exposure to the toxin indicated that SOD was involved in decreasing oxidative stress caused by microcystin-LR. Simultaneously with growth, Poterioochromonas was able to degrade microcystin-LR even, at a toxin concentration of 4 mg/L. This putative degradation mechanism in Poterioochromonas is explored further and discussed in this article. Our findings may shed light on understanding the role of Poterioochromonas in the aquatic ecosystem, in particular, as a grazer of toxic cyanobacteria and a biodegrader for microcystins. (c) 2005 Wiley Periodicals, Inc.
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]Environmental Sciences ; Toxicology ; Water Resources
研究领域[WOS]Environmental Sciences & Ecology ; Toxicology ; Water Resources
关键词[WOS]INTRACELLULAR GLUTATHIONE ALTERATION ; CYANOBACTERIAL HEPATOTOXINS ; BACTERIAL-DEGRADATION ; OCHROMONAS-DANICA ; LR ; MALHAMENSIS ; CHRYSOPHYCEAE ; DECOMPOSITION ; HEPATOCYTES ; PHAGOTROPHY
收录类别ISTP ; SCI
语种英语
WOS记录号WOS:000229897500022
公开日期2015-11-02
源URL[http://ir.ihb.ac.cn/handle/342005/27195]  
专题水生生物研究所_中科院水生所知识产出(2009年前)_期刊论文
作者单位1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式
GB/T 7714
Ou, DY,Song, LR,Gan, NQ,et al. Effects of microcystins on and toxin degradation by Poterioochromonas sp.[J]. ENVIRONMENTAL TOXICOLOGY,2005,20(3):373-380.
APA Ou, DY,Song, LR,Gan, NQ,&Chen, W.(2005).Effects of microcystins on and toxin degradation by Poterioochromonas sp..ENVIRONMENTAL TOXICOLOGY,20(3),373-380.
MLA Ou, DY,et al."Effects of microcystins on and toxin degradation by Poterioochromonas sp.".ENVIRONMENTAL TOXICOLOGY 20.3(2005):373-380.

入库方式: OAI收割

来源:水生生物研究所

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