文献类型： 外文期刊

作者： Gong Yan ² ; Ao HongYi ¹ ; Liu BiBo ³ ; Wen Sheng ⁴ ; Wang Zhi ⁵ ; Hu DingJing ² ; Zhang XingZhong ² ; Song LiRong ¹ ; Liu J ¹ ;

作者机构： 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China

2.Hubei Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Wuhan 430064, Peoples R China

3.Henan Inst Engn, Dept Resourses & Environm Engn, Zhengzhou 451191, Peoples R China

4.Chinese Ctr Dis Control & Prevent, Natl Inst Nutr & Food Safety, Beijing 100050, Peoples R China

5.Jiangsu Acad Agr Sci, Inst Agr Resource & Environm Sci, Nanjing 210014, Peoples R China

关键词： inorganic arsenic;cyanobacteria;Microcystis aeruginosa;microcystin

期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）

ISSN： 1001-6538

年卷期： 2011 年 56 卷 22 期

页码：

收录情况： SCI

摘要： Our previous data have shown that inorganic arsenic concentrations were high in Dianchi Lake, China, where Microcystis blooms often occur. To explore the relationship between arsenic and the growth of Microcystis, the effects of arsenite [As(III)] and arsenate [As(V)] on the growth and toxin production of M. aeruginosa strain FACHB 905 were tested. Results showed that M. aeruginosa FACHB 905 was tolerant to inorganic arsenic and its growth was not inhibited when the concentration of As(III) was below 10(-5) mol L(-1) or that of As(V) below 10(-3) mol L(-1). Total microcystin production was stimulated in the presence of 10(-7) mol L(-1) As(III) and the response of this M. aeruginosa strain to As(III) seemed to be a typical inverted U-shaped hormesis. The content increase of microcystin-LR per cell indicated that the toxicity was enhanced as M. aeruginosa FACHB 905 was exposed to As(V). Considering the relatively high concentration of inorganic arsenic in Dianchi Lake (139 mu g L(-1) in epilimnetic water), the origin of the M. aeruginosa strain, inorganic arsenic favors survival of M. aeruginosa FACHB 905 and may stimulate its microcystin production and cellular toxicity.