Longitudinal Photosynthetic Gradient in Crust Lichens' Thalli

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	Longitudinal Photosynthetic Gradient in Crust Lichens' Thalli
	Wu, Li 1,2; Zhang, Gaoke 1; Lan, Shubin 2; Zhang, Delu 3; Hu, Chunxiang 2
刊名	MICROBIAL ECOLOGY
	2014-05-01
卷号	67 期号:4 页码:888-896
关键词	BIOLOGICAL SOIL CRUSTS RAPID LIGHT CURVES CHLOROPHYLL FLUORESCENCE UV-B GREEN-ALGAE PLANTS STRESS CYANOBACTERIA MECHANISMS SCYTONEMIN
ISSN号	0095-3628
通讯作者	Hu, CX (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China.
中文摘要	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.
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.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Ecology ; Marine & Freshwater Biology ; Microbiology
研究领域[WOS]	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Microbiology
关键词[WOS]	BIOLOGICAL SOIL CRUSTS ; RAPID LIGHT CURVES ; CHLOROPHYLL FLUORESCENCE ; UV-B ; GREEN-ALGAE ; PLANTS ; STRESS ; CYANOBACTERIA ; MECHANISMS ; SCYTONEMIN
收录类别	SCI
资助信息	China Postdoctoral Science Foundation [2013 M542077]; National Natural Science Foundation of China [31300100, 31170464]; National Forestry Public Welfare Industry Research project [201404204]
语种	英语
WOS记录号	WOS:000334495000016
公开日期	2014-08-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20105]
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.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
推荐引用方式 GB/T 7714	Wu, Li,Zhang, Gaoke,Lan, Shubin,et al. Longitudinal Photosynthetic Gradient in Crust Lichens' Thalli[J]. MICROBIAL ECOLOGY,2014,67(4):888-896.
APA	Wu, Li,Zhang, Gaoke,Lan, Shubin,Zhang, Delu,&Hu, Chunxiang.(2014).Longitudinal Photosynthetic Gradient in Crust Lichens' Thalli.MICROBIAL ECOLOGY,67(4),888-896.
MLA	Wu, Li,et al."Longitudinal Photosynthetic Gradient in Crust Lichens' Thalli".MICROBIAL ECOLOGY 67.4(2014):888-896.