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Response of Microcystis to copper stress - Do phenotypes of Microcystis make a difference in stress tolerance?
Wu, Zhong-xing; Gan, Nan-qin; Huang, Qun; Song, Li-rong; Song, LR, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol, Wuhan 430072, Hubei, Peoples R China
2007-05-01
Source PublicationENVIRONMENTAL POLLUTION
ISSN0269-7491
Volume147Issue:2Pages:324-330
AbstractTo elucidate the role of phenotype in stress-tolerant bloom-forming cyanobacterium Microcystis, two phenotypes of M. aeruginosa-unicellular and colonial strains were selected to investigate how they responded to copper stress. Flow cytometry (FCM) examination indicated that the percents of viable cells in unicellular and colonial Microcystis were 1.92-2.83% and 72.3-97.51%, respectively, under 0.25 mg l(-1) copper sulfate treatment for 24 h. Upon exposure to 0.25 mg l(-1) copper sulfate, the activities of antioxidative enzyme, such as superoxide dismutase (SOD) and catalase (CAT), were significantly increased in colonial Microcystis compared to unicellular Microcystis. Meanwhile, the values of the photosynthetic parameters (F-v/F-m, ETRmax and oxygen evolution rate) decreased more rapidly in unicellular Microcystis than in colonial Microcystis. The results indicate that colonial Microcystis has a higher endurance to copper than unicellular Microcystis. This suggests that the efficient treatment concentration of copper sulfate as algaecides will be dependent on the phenotypes of Microcystis. (C) 2006 Elsevier Ltd. All rights reserved.; To elucidate the role of phenotype in stress-tolerant bloom-forming cyanobacterium Microcystis, two phenotypes of M. aeruginosa-unicellular and colonial strains were selected to investigate how they responded to copper stress. Flow cytometry (FCM) examination indicated that the percents of viable cells in unicellular and colonial Microcystis were 1.92-2.83% and 72.3-97.51%, respectively, under 0.25 mg l(-1) copper sulfate treatment for 24 h. Upon exposure to 0.25 mg l(-1) copper sulfate, the activities of antioxidative enzyme, such as superoxide dismutase (SOD) and catalase (CAT), were significantly increased in colonial Microcystis compared to unicellular Microcystis. Meanwhile, the values of the photosynthetic parameters (F-v/F-m, ETRmax and oxygen evolution rate) decreased more rapidly in unicellular Microcystis than in colonial Microcystis. The results indicate that colonial Microcystis has a higher endurance to copper than unicellular Microcystis. This suggests that the efficient treatment concentration of copper sulfate as algaecides will be dependent on the phenotypes of Microcystis. (C) 2006 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordCopper Sulfate Unicellular And Colonial Microcystis Aeruginosa F-v/f-m Maximum Electron Transport Rate (Etrmax) Superoxide Dismutase (Sod) Catalase (Cat) Flow Cytometry (Fcm)
DepartmentChinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol, Wuhan 430072, Hubei, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China
Subject AreaEnvironmental Sciences
DOI10.1016/j.envpol.2006.05.022
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000246457700004
WOS KeywordPHOTOSYSTEM-II ; CHLOROPHYLL FLUORESCENCE ; SUPEROXIDE-DISMUTASE ; CUSO4 TREATMENT ; FLOW-CYTOMETRY ; FUCUS-SERRATUS ; CYANOBACTERIA ; AERUGINOSA ; CU ; PHOTOSYNTHESIS
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Cited Times:76[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8594
Collection期刊论文
Corresponding AuthorSong, LR, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol, Wuhan 430072, Hubei, Peoples R China
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol, Wuhan 430072, Hubei, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China
Recommended Citation
GB/T 7714
Wu, Zhong-xing,Gan, Nan-qin,Huang, Qun,et al. Response of Microcystis to copper stress - Do phenotypes of Microcystis make a difference in stress tolerance?[J]. ENVIRONMENTAL POLLUTION,2007,147(2):324-330.
APA Wu, Zhong-xing,Gan, Nan-qin,Huang, Qun,Song, Li-rong,&Song, LR, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol, Wuhan 430072, Hubei, Peoples R China.(2007).Response of Microcystis to copper stress - Do phenotypes of Microcystis make a difference in stress tolerance?.ENVIRONMENTAL POLLUTION,147(2),324-330.
MLA Wu, Zhong-xing,et al."Response of Microcystis to copper stress - Do phenotypes of Microcystis make a difference in stress tolerance?".ENVIRONMENTAL POLLUTION 147.2(2007):324-330.
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