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学科主题: Limnology
题名: Isolation, identification and characterization of phytoplankton-lytic bacterium CH-22 against Microcystis aeruginosa
作者: Zhang, Hong1; Yu, Zengliang1; Huang, Qing1; Xiao, Xiang2; Wang, Xu1; Zhang, Fayu1; Wang, Xiangqin1; Liu, Yongding3; Hu, Chunxiang3
通讯作者: Zhang, H, Chinese Acad Sci, Key Lab Ion Beam Bioengn, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China ; zh_elite@126.com, zlyu@ipp.ac.cn
关键词: Phytoplankton-lytic bacterium ; Pseudomonas putida ; Microcystis aeruginosa ; Biological control ; Cyanobacterial blooms
刊名: LIMNOLOGICA
发表日期: 2011-02-01
DOI: 10.1016/j.limno.2010.08.001
卷: 41, 期:1, 页:70-77
收录类别: SCI
文章类型: Article
部门归属: [Zhang, Hong; Yu, Zengliang; Huang, Qing; Wang, Xu; Zhang, Fayu; Wang, Xiangqin] Chinese Acad Sci, Key Lab Ion Beam Bioengn, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China; [Xiao, Xiang] Univ Sci & Technol China, Sch Chem, Lab Environm Biotechnol, Hefei 230026, Anhui, Peoples R China; [Liu, Yongding; Hu, Chunxiang] Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: President Foundation of Hefei Institutes of Physical Science ; Chinese Academy of Sciences [075AH24581]; National Basic Research Program of China [2007CB936602]
类目[WOS]: Limnology
研究领域[WOS]: Marine & Freshwater Biology
摘要: A bacterial strain named CH-22 showing phytoplankton-lytic activity against bloom-forming cyanobacterium Microcystis aeruginosa was isolated from Lake Chaohu of Anhui Province, China. The isolated strain was identified as Pseudomonas putida by morphology and homology research based on 16S rDNA. The phytoplankton-lytic activity was confirmed by reduction in cell number and chlorophyll a concentration of M. aeruginosa in an infected culture for a defined period. The initial bacterial and M. aeruginosa densities affected the phytoplankton-lytic activity significantly. When the 15% (150 mu L/mL) concentration of bacterial cultures was infected, the highest phytoplankton-lytic activity reached to 98.8% after 7 days. When the initial M. aeruginosa density was less than 3 x 10(6) cells/mL, about 90.0% of chlorophyll a was removed. Obvious reduction in phycocyanin concentration in the treated M. aeruginosa suggests that isolated strain may possibly inhibit the synthesis of photosynthetic apparatus. Supernatants of bacterial cultures showed higher phytoplankton-lytic activity, suggesting that phytoplankton-lytic bacterium P. putida indirectly attacked M. aeruginosa cells by secretion of extracellular antialgal substances, which is characterized as anti-heat shock. The isolated P. putida also showed effective phytoplankton-lytic activity against a wide range of phytoplankton. These results suggest that indigenous bacteria isolated from eutrophic lake may be employed to regulate the ecological balance between the phytoplankton and bacteria, and consequently, to reduce the occurrence of cyanobacterial blooms in freshwaters. (C) 2010 Elsevier GmbH. All rights reserved.
英文摘要: A bacterial strain named CH-22 showing phytoplankton-lytic activity against bloom-forming cyanobacterium Microcystis aeruginosa was isolated from Lake Chaohu of Anhui Province, China. The isolated strain was identified as Pseudomonas putida by morphology and homology research based on 16S rDNA. The phytoplankton-lytic activity was confirmed by reduction in cell number and chlorophyll a concentration of M. aeruginosa in an infected culture for a defined period. The initial bacterial and M. aeruginosa densities affected the phytoplankton-lytic activity significantly. When the 15% (150 mu L/mL) concentration of bacterial cultures was infected, the highest phytoplankton-lytic activity reached to 98.8% after 7 days. When the initial M. aeruginosa density was less than 3 x 10(6) cells/mL, about 90.0% of chlorophyll a was removed. Obvious reduction in phycocyanin concentration in the treated M. aeruginosa suggests that isolated strain may possibly inhibit the synthesis of photosynthetic apparatus. Supernatants of bacterial cultures showed higher phytoplankton-lytic activity, suggesting that phytoplankton-lytic bacterium P. putida indirectly attacked M. aeruginosa cells by secretion of extracellular antialgal substances, which is characterized as anti-heat shock. The isolated P. putida also showed effective phytoplankton-lytic activity against a wide range of phytoplankton. These results suggest that indigenous bacteria isolated from eutrophic lake may be employed to regulate the ecological balance between the phytoplankton and bacteria, and consequently, to reduce the occurrence of cyanobacterial blooms in freshwaters. (C) 2010 Elsevier GmbH. All rights reserved.
关键词[WOS]: APHANIZOMENON-FLOS-AQUAE ; HARMFUL ALGAL BLOOMS ; BLUE-GREEN-ALGA ; TAIHU LAKE ; CYANOBACTERIAL BLOOMS ; LOCAL SOILS ; ALGICIDAL ACTIVITY ; CLAY FLOCCULATION ; WATER ; REMOVAL
语种: 英语
WOS记录号: WOS:000286909300009
ISSN号: 0075-9511
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/15536
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, Key Lab Ion Beam Bioengn, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
2.Univ Sci & Technol China, Sch Chem, Lab Environm Biotechnol, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China

Recommended Citation:
Zhang, Hong; Yu, Zengliang; Huang, Qing; Xiao, Xiang; Wang, Xu; Zhang, Fayu; Wang, Xiangqin; Liu, Yongding; Hu, Chunxiang.Isolation, identification and characterization of phytoplankton-lytic bacterium CH-22 against Microcystis aeruginosa,LIMNOLOGICA,2011,41(1):70-77
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