Evidence for the regulation of leaf movement by photosystem II activity

doi:10.1016/j.envexpbot.2014.06.010

	Evidence for the regulation of leaf movement by photosystem II activity
	Huang, Wei1,2 ; Zhang, Jiao-Lin 2; 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
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
卷号	107 页码:167-172
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.
关键词	Chlorophyll Fluorescence Leaf Movement Photoinhibition Photoprotection Photosystem Ii
学科领域	Plant Sciences ; Environmental Sciences
DOI	10.1016/j.envexpbot.2014.06.010
收录类别	SCI
语种	英语
WOS记录号	WOS:000340987300019
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/18303
专题	资源植物与生物技术所级重点实验室
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
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
推荐引用方式 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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