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Evidence for the regulation of leaf movement by photosystem II activity
Huang, Wei1,2; Zhang, Jiao-Lin2; Zhang, Shi-Bao1; Hu, Hong1; Huang, W (reprint author), Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China.; huangwei@mail.kib.ac.cn
2014-11-01
Source PublicationENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN0098-8472
Volume107Pages:167-172
Contribution Rank第一
AbstractSome light-demanding plants fold leaves under high light and open leaves under low light. Since paraheliotropism leaf movement under high light could be induced by environmental stresses that aggravate photoinhibition of photosystem II (PSII), we hypothesize that the leaf movement is regulated by PSII activity. To test this hypothesis, we examined photosynthetic gas exchange and chlorophyll fluorescence, diurnal changes in leaf angle, and maximum quantum yield of PSII (F-v/F-m) in a leaf-foldable canopy liana, Bauhinia tenuiflora, grown in an open field. The rate of CO2 assimilation, electron transport rate, and non-photochemical quenching was saturated under light of 1000 mu mol photons m(-2) s(-1). After exposure to high light of 1000 mu mol photons m(-2) s(-1) and 2000 mu mol photons m(-2) s(-1) for 8h, F-v/F-m decreased to 54% and 19%, respectively. The repair of photodamaged PSII was strongly suppressed when illuminated at high light. After high light treatment, the recovery of PSII activity under low light functions efficiently. During the daytime, the minimum values of F-v/F-m and leaf angle were 0.75 degrees and 9 degrees, respectively. In the early morning, high F-v/F-m was accompanied by large leaf angle. At noon, when F-v/F-m was lower than 0.8, B. tenuiflora strongly folded its leaves. In the afternoon, when F-v/F-m, was higher than 0.8, leaf angle gradually increased. After treatment with 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU, an inhibitor of PSII), F-v/F-m and leaf angle decreased significantly. Based on these results, the leaf movement in B. tenuiflora can be regulated by PSII photoinhibition, suggesting that PSII photoinhibition plays a potential role in the regulation of leaf movement under environmental stresses. (C) 2014 Elsevier B.V. All rights reserved.
KeywordChlorophyll Fluorescence Leaf Movement Photoinhibition Photoprotection Photosystem Ii
Subject AreaPlant Sciences ; Environmental Sciences
DOI10.1016/j.envexpbot.2014.06.010
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences ; Environmental Sciences & Ecology
WOS SubjectPlant Sciences ; Environmental Sciences
WOS IDWOS:000340987300019
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/18303
Collection资源植物与生物技术所级重点实验室
Corresponding AuthorHuang, W (reprint author), Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China.; huangwei@mail.kib.ac.cn
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Huang, Wei,Zhang, Jiao-Lin,Zhang, Shi-Bao,et al. Evidence for the regulation of leaf movement by photosystem II activity[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2014,107:167-172.
APA Huang, Wei,Zhang, Jiao-Lin,Zhang, Shi-Bao,Hu, Hong,Huang, W ,&huangwei@mail.kib.ac.cn.(2014).Evidence for the regulation of leaf movement by photosystem II activity.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,107,167-172.
MLA Huang, Wei,et al."Evidence for the regulation of leaf movement by photosystem II activity".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 107(2014):167-172.
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