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题名: Desiccation provides photosynthetic protection for crust cyanobacteria Microcoleus vaginatus from high temperature
作者: Lan, Shubin1; Wu, Li1, 2; Zhang, Delu1, 3; Hu, Chunxiang1
关键词: BIOLOGICAL SOIL CRUSTS ; CHLOROPHYLL FLUORESCENCE ; MICROBIOTIC CRUSTS ; COLORADO PLATEAU ; INNER-MONGOLIA ; ALGAL CRUSTS ; DESERT ; PLANTS ; STRESS ; MECHANISMS
刊名: PHYSIOLOGIA PLANTARUM
发表日期: 2014-10-01
DOI: 10.1111/ppl.12176
卷: 152, 期:2, 页:345-354
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Plant Sciences
研究领域[WOS]: Plant Sciences
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.
关键词[WOS]: BIOLOGICAL SOIL CRUSTS ; CHLOROPHYLL FLUORESCENCE ; MICROBIOTIC CRUSTS ; COLORADO PLATEAU ; INNER-MONGOLIA ; ALGAL CRUSTS ; DESERT ; PLANTS ; STRESS ; MECHANISMS
语种: 英语
WOS记录号: WOS:000342318600011
ISSN号: 0031-9317
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/20396
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, 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

Recommended Citation:
Lan, Shubin; Wu, Li; Zhang, Delu; Hu, Chunxiang.Desiccation provides photosynthetic protection for crust cyanobacteria Microcoleus vaginatus from high temperature,PHYSIOLOGIA PLANTARUM,2014,():
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