Photosynthetic adaptation mechanism of Microcystis (Cyanophyceae) related to changes of colony size in a eutrophic lake

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	Photosynthetic adaptation mechanism of Microcystis (Cyanophyceae) related to changes of colony size in a eutrophic lake
	Wang, Zhicong; Li, Dunhai; Cao, Xiuyun; Song, Chunlei; Zhou, Yiyong
刊名	PHYCOLOGIA
	2014
卷号	53 期号:6 页码:552-560
关键词	Algal colony sizes Cyanobacterial bloom Eutrophic lake Microcystis Photosynthesis
ISSN号	0031-8884
通讯作者	Zhou, YY (reprint author), Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China.
英文摘要	Microcystis blooms occur frequently in eutrophic lakes, and they are composed of many different-sized colonies. Many studies have addressed the competitive advantage of colony size, e.g. colony buoyancy regulation mechanism, low nutrient stress tolerance, low irradiance stress; however, studies are lacking for growth strategies of different-sized Microcystis colonies responding to photosynthetic regulation. This study compared photosynthetic activities and photosynthetic pigment composition of different-sized Microcystis. The results showed that the photosynthetic activity caused a V-shaped curve as colony size increased, i.e. medium-sized colonies (125-400 mu m) had the lowest photosynthetic activity. The higher photosynthetic activity of small colonies (<125 mu m) was probably caused by the higher light-harvesting efficiency of phycobilisomes (PBS) and a relatively low nonphotochemical quenching (qN). The high photosynthesis of large colonies (>400 mu m) was attributed to the high efficiency of energy transition of the electron transport chains in photosystem II. Also, large colonies tolerated high irradiance stress because of their high qN, which was related to high cell quotas of PBS. All these results suggested that both small and large colonies had their own ecological adaptation strategies when they were suspended at different water layers, providing an explanation for how Microcystis survives adverse natural conditions, grows rapidly and forms serious surface blooms.
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
关键词[WOS]	BLOOM-FORMING MICROCYSTIS ; RESOLVED FLUORESCENCE SPECTROSCOPY ; CHLOROPHYLL FLUORESCENCE ; ARTHROSPIRA-PLATENSIS ; LIGHT CONDITIONS ; DECLINE PROCESS ; PHOTOSYSTEM-II ; CYANOBACTERIA ; PHOSPHORUS ; CHINA
收录类别	SCI
语种	英语
WOS记录号	WOS:000347965000003
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/23956]
专题	水生生物研究所_水环境工程研究中心_期刊论文
作者单位	Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhicong,Li, Dunhai,Cao, Xiuyun,et al. Photosynthetic adaptation mechanism of Microcystis (Cyanophyceae) related to changes of colony size in a eutrophic lake[J]. PHYCOLOGIA,2014,53(6):552-560.
APA	Wang, Zhicong,Li, Dunhai,Cao, Xiuyun,Song, Chunlei,&Zhou, Yiyong.(2014).Photosynthetic adaptation mechanism of Microcystis (Cyanophyceae) related to changes of colony size in a eutrophic lake.PHYCOLOGIA,53(6),552-560.
MLA	Wang, Zhicong,et al."Photosynthetic adaptation mechanism of Microcystis (Cyanophyceae) related to changes of colony size in a eutrophic lake".PHYCOLOGIA 53.6(2014):552-560.