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题名: Genotypes of ITS region of rRNA in Microcystis (Cyanobacteria) populations in Erhai Lake (China) and their correlation with eutrophication level
作者: Song, Gaofei1, 2; Jiang, Yongguang1, 3; Yu, Gongliang1; Li, Renhui1
关键词: Microcystis bloom ; ITS genotype ; Eutrophication level ; Diversity
刊名: JOURNAL OF BASIC MICROBIOLOGY
发表日期: 2015-10-01
DOI: 10.1002/jobm.201500080
卷: 55, 期:10, 页:1203-1211
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Microbiology
研究领域[WOS]: Microbiology
英文摘要: Previous studies on spatiotemporal changes of Microcystis genotypes have shown that the existence and succession of dominant genotypes always occur in eutrophicated freshwater bodies. However, few studies have focused on the correlation between genotype composition and eutrophication level. In the present study, clone libraries of the internal transcribed spacer (ITS) of rrn operon were sequenced from Microcystis populations in Erhai Lake, a subtropical plateau lake in the preliminary eutrophication stage. The genotype composition of the Microcystis populations was highly variable at spatiotemporal scales, and 473 ITS genotypes were identified from the 800 ITS sequences obtained. However, no significantly dominant ITS genotypes existed in the lake. Comparison of Erhai Lake with four major lakes in China, namely, Taihu, Chaohu, Gucheng, and Shijiu Lakes, showed that the Microcystis ITS genotypes and genetic diversity were negatively correlated with eutrophication level. Extensive comparison of the Microcystis ITS genotypes from waters worldwide revealed that 440 ITS genotypes were unique to Erhai Lake, and no obvious phylogenetic correlations can be detected among the dominant genotypes from different water bodies. The high genetic diversity of the Microcystis populations in Erhai Lake may have resulted from the effect of the early stage of eutrophication.
关键词[WOS]: GENETIC DIVERSITY ; PHYTOPLANKTON BLOOMS ; WATER-QUALITY ; SPACER ; NITROGEN ; TAIHU ; 16S
语种: 英语
项目资助者: National Water Science and Technology Projects(2012ZX07105-004) ; NSFC(31200355)
WOS记录号: WOS:000363891600006
ISSN号: 0233-111X
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27349
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Hubei Province, Peoples R China
2.Grad Univ Chinese Acad Sci, Beijing, Peoples R China
3.Shenzhen Univ, Coll Life Sci, Shenzhen Key Lab Marine Bioresource & Ecoenvironm, Shenzhen, Peoples R China
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