Recovery of chlorophyll fluorescence and CO2 exchange in lichen soil crusts after rehydration
文献类型：期刊论文
| 作者 | Wu, Li1; Lan, Shubin1; Zhang, Delu2; Hu, Chunxiang1 |
| 刊名 | EUROPEAN JOURNAL OF SOIL BIOLOGY
 |
| 出版日期 | 2013-03-01 |
| 卷号 | 55页码:77-82 |
| 关键词 | Lichen soil crusts Chlorophyll fluorescence Photosynthetic activity CO2 exchange rate |
| ISSN号 | 1164-5563 |
| 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 | Lichen soil crusts (LSCs) are an important stage during the development of biological soil crusts (BSCs). The photosynthetic characteristics of this stage are determined by both of the symbiotic and free-living cyanobacteria and algae in the crusts. In this study, the recovery rate, extent, pattern of chlorophyll fluorescence and CO2 exchange in LSCs were detected after rehydration under different water contents (5%, 20% and 40%). The results showed that original fluorescence (Fo) of each group increased dramatically after rehydration and then reached a plateau to steady state; however both maximum quantum efficiency of PS II photochemistry (Fv/Fm) and the ratio of variable fluorescence at different recovery time to the maximal value during the recovery period (Fv/Fv(max)) showed a similar and corresponding "three steps" recovery pattern. At the end of experiment, Fv/Fm of 20% water content group recovered to the highest level (0.45), although no obvious difference in the Fv/Fm was found among the three water content groups within the first 4 h. Additionally, after the rehydration CO2 release from LSCs (under the light) gradually decreased, and the organic carbon accumulation first occurred in 40% water content group, in which a higher CO2 assimilation rate was also observed. The obvious inconsistency between chlorophyll fluorescence detection and CO2 exchange analysis is considered to be the result of the special structure and photosynthetic characteristics of LSCs. (C) 2012 Elsevier Masson SAS. All rights reserved. |
| 英文摘要 | Lichen soil crusts (LSCs) are an important stage during the development of biological soil crusts (BSCs). The photosynthetic characteristics of this stage are determined by both of the symbiotic and free-living cyanobacteria and algae in the crusts. In this study, the recovery rate, extent, pattern of chlorophyll fluorescence and CO2 exchange in LSCs were detected after rehydration under different water contents (5%, 20% and 40%). The results showed that original fluorescence (Fo) of each group increased dramatically after rehydration and then reached a plateau to steady state; however both maximum quantum efficiency of PS II photochemistry (Fv/Fm) and the ratio of variable fluorescence at different recovery time to the maximal value during the recovery period (Fv/Fv(max)) showed a similar and corresponding "three steps" recovery pattern. At the end of experiment, Fv/Fm of 20% water content group recovered to the highest level (0.45), although no obvious difference in the Fv/Fm was found among the three water content groups within the first 4 h. Additionally, after the rehydration CO2 release from LSCs (under the light) gradually decreased, and the organic carbon accumulation first occurred in 40% water content group, in which a higher CO2 assimilation rate was also observed. The obvious inconsistency between chlorophyll fluorescence detection and CO2 exchange analysis is considered to be the result of the special structure and photosynthetic characteristics of LSCs. (C) 2012 Elsevier Masson SAS. All rights reserved. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Ecology ; Soil Science |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Agriculture |
| 关键词[WOS] | NAMIB FOG DESERT ; COLORADO PLATEAU ; WATER RELATIONS ; CYANOBACTERIAL CRUSTS ; SUCCESSIONAL STAGES ; ENERGY-DISSIPATION ; EPIPHYTIC LICHENS ; NITROGEN-FIXATION ; ALGAL CRUSTS ; CARBON |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [30870470, 31170464] |
| 语种 | 英语 |
| WOS记录号 | WOS:000316506800012 |
| 公开日期 | 2013-10-31 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/19354]  |
| 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, Dept Biol Sci & Biotechnol, Wuhan 430070, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Li,Lan, Shubin,Zhang, Delu,et al. Recovery of chlorophyll fluorescence and CO2 exchange in lichen soil crusts after rehydration[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2013,55:77-82. |
| APA | Wu, Li,Lan, Shubin,Zhang, Delu,&Hu, Chunxiang.(2013).Recovery of chlorophyll fluorescence and CO2 exchange in lichen soil crusts after rehydration.EUROPEAN JOURNAL OF SOIL BIOLOGY,55,77-82. |
| MLA | Wu, Li,et al."Recovery of chlorophyll fluorescence and CO2 exchange in lichen soil crusts after rehydration".EUROPEAN JOURNAL OF SOIL BIOLOGY 55(2013):77-82. |
入库方式： OAI收割
来源：水生生物研究所
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