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ARSENIC SPECIATION AND EFFECT OF ARSENATE INHIBITION IN A MICROCYSTIS AERUGINOSA CULTURE MEDIUM UNDER DIFFERENT PHOSPHATE REGIMES

文献类型： 外文期刊

作者： Guo, Pengran 2 ; Gong, Yan 3 ; Wang, Chang 1 ; Liu, Xi 1 ; Liu, Jiantong 1 ;

作者机构： 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China

2.China Natl Analyt Ctr Guangzhou, Guangdong Prov Publ Lab Anal & Testing Technol, Guangzhou, Guangdong, Peoples R China

3.Hubei Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Wuhan, Peoples R China

关键词： Microcystis aeruginosa;Arsenic speciation;Phosphate;Arsenate

期刊名称：ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY （ 影响因子：3.742； 五年影响因子：3.866 ）

ISSN： 0730-7268

年卷期： 2011 年 30 卷 8 期

页码：

收录情况： SCI

摘要： To assess the ecological impact of arsenic pollution during cyanobacterial blooms, As speciation and cyanobacterial growth in phosphate-modified Microcystis aeruginosa cultures treated with arsenate were investigated under laboratory conditions. Marked growth inhibition was observed when arsenate was added. The inhibition effect of 1 mu M arsenate was lower than that of 10 mu M arsenate. Increasing phosphate supply (0-175 mu M) in the medium decreased the inhibition of As. In the medium, arsenate, arsenite, and dimethylarsenicals (DMA) occurred under phosphate-deprivation (0 mu M) and phosphate-excess (175 mu M) conditions. However, only arsenate and DMA were detected under phosphate-limited (1 mu M) and phosphate-rich (10 mu M) conditions. Moreover, arsenite and DMA concentrations had significantly positive correlation with the biomass production of M. aeruginosa in the existence of phosphate. Arsenic speciation was more significantly affected by phosphate levels than arsenate concentrations. Recovery of total As content in M. aeruginosa culture medium increased with the increasing phosphate supply. The duration of arsenate contamination in the culture of M. aeruginosa had no influence on the variation of As species but affected the concentration of them in the medium under the phosphate-excess condition. This demonstrated that the effect of M. aeruginosa on As speciation was not related to the duration of As contamination under the phosphate-excess condition. Environ. Toxicol. Chem. 2011;30:1754-1759. (C) 2011 SETAC

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[1]Effects of inorganic arsenic on growth and microcystin production of a Microcystis strain isolated from an algal bloom in Dianchi Lake, China. Ao HongYi,Song LiRong,Liu JianTong,Gong Yan,Hu DingJing,Zhang XingZhong,Liu BiBo,Wen Sheng,Wang Zhi. 2011

[2]Effects of arsenate on the growth and microcystin production of Microcystis aeruginosa isolated from Taiwan as influenced by extracellular phosphate. Gong, Yan,Liu, Xi,Liu, Jiantong,Song, Lirong,Gong, Yan,Liu, Xi,Chou, Hong-Nong,Tu, Chi-dao.

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