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题名: Differential responses of different phenotypes of Microcystis (Cyanophyceae) to UV-B radiation
作者: Qin, Hongjie1, 2; Li, Shuangshuang1, 3; Li, Dunhai1
通讯作者: Li, DH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China.
关键词: Chlorophyll fluorescence ; Cyanobacteria ; Migration rate ; Phenotypic plasticity ; Photosynthesis ; UV-B radiation
刊名: PHYCOLOGIA
发表日期: 2015
DOI: 10.2216/PH14-93.1
卷: 54, 期:2, 页:118-129
收录类别: SCI
文章类型: Article
部门归属: [Qin, Hongjie ; Li, Shuangshuang ; Li, Dunhai] Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China ; [Qin, Hongjie] Jiangsu Acad Agr Sci, Inst Agr Resource & Environm, Nanjing 210014, Jiangsu, Peoples R China ; [Li, Shuangshuang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Plant Sciences ; Marine & Freshwater Biology
研究领域[WOS]: Plant Sciences ; Marine & Freshwater Biology
英文摘要: Microcystis can be single celled or colonial under certain conditions, thereby possessing phenotypic plasticity. Differential physiological and biochemical responses of colonial Microcystis aeruginosa FACHB 939 and its single-celled strain to ultraviolet type B radiation (UV-B) exposure were investigated. Results suggested that UV-B exposure exerted a lower inhibitory effect on the growth of colonial Microcystis, and that the single-celled strain had higher ability to recover after exposure to UV-B. Carotenoids/chlorophyll a (Chl a) ratios were increased, whereas phycobilisome/Chl a ratios were decreased by UV-B exposure. The photosynthetic activities of both phenotypes were inhibited, but colonial Microcystis showed higher tolerance and recovery ability to UV-B exposure. The sheath and shading effect, as well as changes of pigments of colonial Microcystis, were believed to play roles in resisting UV-B exposure. UV-B radiation can increase the sinking rate of the single-celled Microcystis and cause colonial Microcystis to shift from a floating to a sinking state. The observed reduction of colony size and increase in total carbohydrate content induced by UV-B radiation presumably caused the decrease in buoyancy in Microcystis. However, the increase in sinking rate is also an important way for Microcystis to avoid damage inflicted by UV-B radiation.
关键词[WOS]: SOLAR ULTRAVIOLET-RADIATION ; BLOOM-FORMING MICROCYSTIS ; BUOYANCY REGULATION ; CYANOBACTERIUM MICROCYSTIS ; VERTICAL MIGRATION ; PHYSIOLOGICAL-CHANGES ; AERUGINOSA KUTZ ; FLOS-AQUAE ; GROWTH ; LIGHT
语种: 英语
WOS记录号: WOS:000355114900003
ISSN号: 0031-8884
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/23934
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Resource & Environm, Nanjing 210014, Jiangsu, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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文件名: Differential responses of different phenotypes of Microcystis (Cyanophyceae) to UV-B radiation.pdf
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