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题名: Longitudinal Photosynthetic Gradient in Crust Lichens' Thalli
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 ; RAPID LIGHT CURVES ; CHLOROPHYLL FLUORESCENCE ; UV-B ; GREEN-ALGAE ; PLANTS ; STRESS ; CYANOBACTERIA ; MECHANISMS ; SCYTONEMIN
刊名: MICROBIAL ECOLOGY
发表日期: 2014-05-01
DOI: 10.1007/s00248-014-0366-9
卷: 67, 期:4, 页:888-896
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: China Postdoctoral Science Foundation [2013 M542077]; National Natural Science Foundation of China [31300100, 31170464]; National Forestry Public Welfare Industry Research project [201404204]
类目[WOS]: Ecology ; Marine & Freshwater Biology ; Microbiology
研究领域[WOS]: Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Microbiology
摘要: In order to evaluate the self-shading protection for inner photobionts, the photosynthetic activities of three crust lichens were detected using Microscope-Imaging-PAM. The false color images showed that longitudinal photosynthetic gradient was found in both the green algal lichen Placidium sp. and the cyanolichen Peltula sp. In longitudinal direction, all the four chlorophyll fluorescence parameters Fv/Fm, Yield, qP, and rETR gradually decreased with depth in the thalli of both of these two lichens. In Placidium sp., qN values decreased with depth, whereas an opposite trend was found in Peltula sp. However, no such photosynthetic heterogeneity was found in the thalli of Collema sp. in longitudinal direction. Microscope observation showed that photobiont cells are compactly arranged in Placidium sp. and Peltula sp. while loosely distributed in Collema sp. It was considered that the longitudinal photosynthetic heterogeneity was ascribed to the result of gradual decrease of incidence caused by the compact arrangement of photobiont cells in the thalli. The results indicate a good protection from the self-shading for the inner photobionts against high radiation in crust lichens.
英文摘要: In order to evaluate the self-shading protection for inner photobionts, the photosynthetic activities of three crust lichens were detected using Microscope-Imaging-PAM. The false color images showed that longitudinal photosynthetic gradient was found in both the green algal lichen Placidium sp. and the cyanolichen Peltula sp. In longitudinal direction, all the four chlorophyll fluorescence parameters Fv/Fm, Yield, qP, and rETR gradually decreased with depth in the thalli of both of these two lichens. In Placidium sp., qN values decreased with depth, whereas an opposite trend was found in Peltula sp. However, no such photosynthetic heterogeneity was found in the thalli of Collema sp. in longitudinal direction. Microscope observation showed that photobiont cells are compactly arranged in Placidium sp. and Peltula sp. while loosely distributed in Collema sp. It was considered that the longitudinal photosynthetic heterogeneity was ascribed to the result of gradual decrease of incidence caused by the compact arrangement of photobiont cells in the thalli. The results indicate a good protection from the self-shading for the inner photobionts against high radiation in crust lichens.
关键词[WOS]: BIOLOGICAL SOIL CRUSTS ; RAPID LIGHT CURVES ; CHLOROPHYLL FLUORESCENCE ; UV-B ; GREEN-ALGAE ; PLANTS ; STRESS ; CYANOBACTERIA ; MECHANISMS ; SCYTONEMIN
语种: 英语
WOS记录号: WOS:000334495000016
ISSN号: 0095-3628
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/20105
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.Longitudinal Photosynthetic Gradient in Crust Lichens' Thalli,MICROBIAL ECOLOGY,2014,67(4):888-896
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