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题名: Evidence for the regulation of leaf movement by photosystem II activity
作者: Huang, Wei1, 2; Zhang, Jiao-Lin2; Zhang, Shi-Bao1; Hu, Hong1
刊名: ENVIRONMENTAL AND EXPERIMENTAL BOTANY
出版日期: 2014-11-01
卷号: 107, 页码:167-172
关键词: Chlorophyll fluorescence ; Leaf movement ; Photoinhibition ; Photoprotection ; Photosystem II
学科分类: Plant Sciences ; Environmental Sciences
DOI: 10.1016/j.envexpbot.2014.06.010
通讯作者: Huang, W (reprint author), Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China. ; huangwei@mail.kib.ac.cn
文章类型: Article
英文摘要: Some 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.
类目[WOS]: Plant Sciences ; Environmental Sciences
研究领域[WOS]: Plant Sciences ; Environmental Sciences & Ecology
关键词[WOS]: SYNECHOCYSTIS SP PCC-6803 ; CYCLIC ELECTRON FLOW ; PHOTON FLUX-DENSITY ; CHLOROPHYLL FLUORESCENCE ; ENVIRONMENTAL-STRESS ; WATER AVAILABILITY ; DIFFERENT NITROGEN ; XANTHOPHYLL CYCLE ; OXIDATIVE STRESS ; GAS-EXCHANGE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000340987300019
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/18303
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.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:
Huang,Wei;Zhang,Jiao-Lin;Zhang,Shi-Bao;Hu,Hong.Evidence for the regulation of leaf movement by photosystem II activity,ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2014,107():167-172
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