Desiccation provides photosynthetic protection for crust cyanobacteria Microcoleus vaginatus from high temperature

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	Desiccation provides photosynthetic protection for crust cyanobacteria Microcoleus vaginatus from high temperature
	Lan, Shubin 1; Wu, Li 1,2; Zhang, Delu 1,3; Hu, Chunxiang 1
刊名	PHYSIOLOGIA PLANTARUM
	2014-10-01
卷号	152 期号:2 页码:345-354
关键词	BIOLOGICAL SOIL CRUSTS CHLOROPHYLL FLUORESCENCE MICROBIOTIC CRUSTS COLORADO PLATEAU INNER-MONGOLIA ALGAL CRUSTS DESERT PLANTS STRESS MECHANISMS
ISSN号	0031-9317
英文摘要	As the dominant cyanobacterial species in biological soil crusts (BSCs), Microcoleus vaginatus often suffer from many stress conditions, such as desiccation and high temperature. In this study, the activities of light-harvesting complexes (LHCs) and reaction centers of photosystem II (PS II) in crust cyanobacteria M. vaginatus were monitored under high temperature and desiccation conditions using chlorophyll fluorescence technology. The results showed that all the fluorescence signals were significantly inhibited by high temperature or desiccation treatments. Under high temperature conditions, it was further demonstrated that PS II reaction centers were first destructed within the first hour, then the LHCs gradually dissociated and free phycocyanin formed within 1-5h, and the activities of all the light harvesting and reaction center pigment proteins were fully suppressed after 24h of high temperature treatment. Furthermore, the high temperature treated M. vaginatus lost its ability to recover photosynthetic activity. On the contrary, although desiccation also led to the loss of photosynthetic activity in M. vaginatus, after rehydration in the light the fluorescence parameters including Fo, Fv and Fv/Fm could be well recovered within 12h. It was concluded that desiccation could provide crust cyanobacteria M. vaginatus some protection from other stresses, such as high temperature demonstrated in this experiment. The combine of temperature change and precipitation pattern in the field provide a guarantee for the alternate metabolism and inactivity in crust cyanobacteria. That may be a very important strategy for the survival of crust cyanobacteria in high temperature regions.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Plant Sciences
研究领域[WOS]	Plant Sciences
关键词[WOS]	BIOLOGICAL SOIL CRUSTS ; CHLOROPHYLL FLUORESCENCE ; MICROBIOTIC CRUSTS ; COLORADO PLATEAU ; INNER-MONGOLIA ; ALGAL CRUSTS ; DESERT ; PLANTS ; STRESS ; MECHANISMS
收录类别	SCI
语种	英语
WOS记录号	WOS:000342318600011
公开日期	2015-01-20
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20396]
专题	水生生物研究所_藻类生物学及应用研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China 2.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China 3.Wuhan Univ Technol, Sch Sci, Wuhan 430070, Peoples R China
推荐引用方式 GB/T 7714	Lan, Shubin,Wu, Li,Zhang, Delu,et al. Desiccation provides photosynthetic protection for crust cyanobacteria Microcoleus vaginatus from high temperature[J]. PHYSIOLOGIA PLANTARUM,2014,152(2):345-354.
APA	Lan, Shubin,Wu, Li,Zhang, Delu,&Hu, Chunxiang.(2014).Desiccation provides photosynthetic protection for crust cyanobacteria Microcoleus vaginatus from high temperature.PHYSIOLOGIA PLANTARUM,152(2),345-354.
MLA	Lan, Shubin,et al."Desiccation provides photosynthetic protection for crust cyanobacteria Microcoleus vaginatus from high temperature".PHYSIOLOGIA PLANTARUM 152.2(2014):345-354.