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题名: Microstructures and photosynthetic diurnal changes in the different types of lichen soil crusts
作者: Wu, Li1, 2; Zhang, Gaoke1; Lan, Shubin2; Zhang, Delu3; Hu, Chunxiang2
通讯作者: Hu, CX (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China.
关键词: Biological soil crusts ; Microstructure ; Photosynthetic efficiency ; Diurnal changes
刊名: EUROPEAN JOURNAL OF SOIL BIOLOGY
发表日期: 2013-11-01
DOI: 10.1016/j.ejsobi.2013.10.001
卷: 59, 页:48-53
收录类别: SCI
文章类型: Article
部门归属: [Wu, Li ; Zhang, Gaoke] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430072, Peoples R China ; [Wu, Li ; Lan, Shubin ; Hu, Chunxiang] Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China ; [Zhang, Delu] Wuhan Univ Technol, Sch Sci, Wuhan 430070, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China [31300100, 31300322, 31170464]; National Forestry Public Welfare Industry Research project [201404204]; China Postdoctoral Science Foundation [2013M542077]
类目[WOS]: Ecology ; Soil Science
研究领域[WOS]: Environmental Sciences & Ecology ; Agriculture
摘要: In the revegetation region of Shapotou (at the southeastern edge of Tengger Desert), biological soil crusts (BSCs) generally develop and succeed from cyanobacterial soil crusts (CSCs) to lichen soil crusts (LSCs). Based on the different dominant lichens on crust surface, LSCs were further divided into cyanolichen soil crusts (CLSCs) and green algae lichen soil crusts (GLSCs). In this study, the microstructures and photosynthetic diurnal changes in both CLSCs and GLSCs were investigated using the microscopic observation and chlorophyll fluorescence techniques. The results showed the different types of LSCs have different surface morphological characteristics and inner structures due to the different biological compositions. Compared with the CLSCs, GLSCs had a higher photosynthetic efficiency, including the maximum photosynthetic efficiency (Fv/Fm) and effective photosynthetic efficiency (Phi(PSII)), which in the final analysis was considered to be closely correlated with the different photosynthetic characteristics between different photobiont types (green algae and cyanobacteria). In addition, similar to CSCs, a midday depression of photosynthetic efficiency was detected in LSCs, although the depression extents were different in different types of LSCs. In conclusion, the occurrence of midday depression of photosynthetic efficiency might be a stress effect and also an adaptation strategy of LSCs to adversity, especially the high light intensity and temperature at noon. (C) 2013 Elsevier Masson SAS. All rights reserved.
英文摘要: In the revegetation region of Shapotou (at the southeastern edge of Tengger Desert), biological soil crusts (BSCs) generally develop and succeed from cyanobacterial soil crusts (CSCs) to lichen soil crusts (LSCs). Based on the different dominant lichens on crust surface, LSCs were further divided into cyanolichen soil crusts (CLSCs) and green algae lichen soil crusts (GLSCs). In this study, the microstructures and photosynthetic diurnal changes in both CLSCs and GLSCs were investigated using the microscopic observation and chlorophyll fluorescence techniques. The results showed the different types of LSCs have different surface morphological characteristics and inner structures due to the different biological compositions. Compared with the CLSCs, GLSCs had a higher photosynthetic efficiency, including the maximum photosynthetic efficiency (Fv/Fm) and effective photosynthetic efficiency (Phi(PSII)), which in the final analysis was considered to be closely correlated with the different photosynthetic characteristics between different photobiont types (green algae and cyanobacteria). In addition, similar to CSCs, a midday depression of photosynthetic efficiency was detected in LSCs, although the depression extents were different in different types of LSCs. In conclusion, the occurrence of midday depression of photosynthetic efficiency might be a stress effect and also an adaptation strategy of LSCs to adversity, especially the high light intensity and temperature at noon. (C) 2013 Elsevier Masson SAS. All rights reserved.
关键词[WOS]: CHLOROPHYLL FLUORESCENCE ; SUCCESSIONAL STAGES ; ALGAL CRUSTS ; INNER-MONGOLIA ; CO2 EXCHANGE ; MICROBIOTIC CRUSTS ; COLORADO PLATEAU ; FIELD CONDITIONS ; DESERT PLANTS ; CYANOBACTERIAL
语种: 英语
WOS记录号: WOS:000328594400008
ISSN号: 1164-5563
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19986
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.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
3.Wuhan Univ Technol, Sch Sci, Wuhan 430070, Peoples R China

Recommended Citation:
Wu, Li; Zhang, Gaoke; Lan, Shubin; Zhang, Delu; Hu, Chunxiang.Microstructures and photosynthetic diurnal changes in the different types of lichen soil crusts,EUROPEAN JOURNAL OF SOIL BIOLOGY,2013,59():48-53
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