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题名: Changes in the bacterial community and extracellular compounds associated with the disaggregation of Microcystis colonies
作者: Wang, Wenjing1, 2; Zhang, Yulei3; Shen, Hong1; Xie, Ping1; Yu, Jia3
关键词: Microcystis ; Associated bacteria ; Extracellular compounds ; Colony disaggregation
刊名: BIOCHEMICAL SYSTEMATICS AND ECOLOGY
发表日期: 2015-08-01
DOI: 10.1016/j.bse.2015.04.016
卷: 61, 页:62-66
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
研究领域[WOS]: Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
英文摘要: Microcystis is a well-studied type of bloom-forming genus cyanobacteria that occurs as colonies in lakes. However, whenever Microcystis colonies are transferred to the laboratory, they always disaggregate into a unicellular form. The mechanism underlying this disaggregation of Microcystis colonies remains uncharacterized. Here, we report on the changes in morphology and the changes in the composition of the associated bacterial community of Microcystis wesenbergii colonies. Denaturing gradient gel electrophoresis analysis (DGGE) showed that the diversity of the associated bacterial community decreased during the disaggregation of Microcystis colonies. Two gamma-Proteobacteria and one Bacteroidetes species from the mucilage of Microcystis colonies were not detected following colony disaggregation, suggesting that these species may influence Microcystis colony morphology. Solid phase microextraction and gas chromatography-mass spectrometry (SPME GC/MS) analysis revealed that seven of the forty-one extracellular compounds detected were exclusively present in the media of the Microcystis colony extracts; these compounds may be secreted by bacteria and may be a beneficial role in Microcystis colony maintenance. The results of this study indicate that changes in the composition of the bacterial community associated with Microcystis colonies are likely responsible for the disaggregation of these colonies in the laboratory. (C) 2015 Elsevier Ltd. All rights reserved.
语种: 英语
WOS记录号: WOS:000361164800009
ISSN号: 0305-1978
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27192
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Huazhong Agr Univ, Coll Fisheries, Wuhan, Peoples R China
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