Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture

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	Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture
	Cui, Xiaoyong ; Niu, Haishan ; Wu, Jing ; Gu, Song ; Wang, Yanfen ; Wang, Shiping ; Zhao, Xinquan ; Tang, Yanhong
	2006-12-01
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
卷号	58 期号:1-3 页码:149-157
文章类型	Article
摘要	A study was carried out to examine the effect of dynamic photosynthetically active photon flux density (PPFD) on photoinhibition and energy use in three herbaceous species, prostrate Saussurea superba, erect-leaved S. katochaete, and half-erect-leaved Gentiana straminea, from the Qinghai-Tibet Plateau. Chlorophyll fluorescence response was measured under each of three sets of high-low PPFD combinations: 1700-0, 1400-300, and 1200-500 mu mol m(-2) s(-1), illuminating in four dynamic frequencies: 1, 5, 15, and 60 cycles per 2 h. The total light exposure time was 2h and the integrated PPFD was the same in all treatments. The highest frequency of PPFD fluctuation resulted in the lowest photochemical activity, the highest level of non-photochemical quenching, and the greatest decrease of F-v/F-m (maximal photochemical efficiency of PSII). The 5 and 15 cycles per 2h treatments resulted in higher photochemical activity than the 1 cycle per 2h treatment. The 1700-0 PPFD combination led to the lowest photochemical activity and more serious photoinhibition in all species. S. superba usually exhibited the highest photochemical activity and CO2 uptake rate, the lowest reduction of F-v/F-m,F- and the smallest fraction of energy in thermal dissipation. With similar fractions of thermal dissipation, S. katochaete had relatively less photoinhibition than G. straminea owing to effective F-o quenching. The results suggest that high frequency of fluctuating PPFD generally results in photoinhibition, which is more serious under periods of irradiation with high light intensity. (c) 2005 Elsevier B.V. All rights reserved.; A study was carried out to examine the effect of dynamic photosynthetically active photon flux density (PPFD) on photoinhibition and energy use in three herbaceous species, prostrate Saussurea superba, erect-leaved S. katochaete, and half-erect-leaved Gentiana straminea, from the Qinghai-Tibet Plateau. Chlorophyll fluorescence response was measured under each of three sets of high-low PPFD combinations: 1700-0, 1400-300, and 1200-500 mu mol m(-2) s(-1), illuminating in four dynamic frequencies: 1, 5, 15, and 60 cycles per 2 h. The total light exposure time was 2h and the integrated PPFD was the same in all treatments. The highest frequency of PPFD fluctuation resulted in the lowest photochemical activity, the highest level of non-photochemical quenching, and the greatest decrease of F-v/F-m (maximal photochemical efficiency of PSII). The 5 and 15 cycles per 2h treatments resulted in higher photochemical activity than the 1 cycle per 2h treatment. The 1700-0 PPFD combination led to the lowest photochemical activity and more serious photoinhibition in all species. S. superba usually exhibited the highest photochemical activity and CO2 uptake rate, the lowest reduction of F-v/F-m,F- and the smallest fraction of energy in thermal dissipation. With similar fractions of thermal dissipation, S. katochaete had relatively less photoinhibition than G. straminea owing to effective F-o quenching. The results suggest that high frequency of fluctuating PPFD generally results in photoinhibition, which is more serious under periods of irradiation with high light intensity. (c) 2005 Elsevier B.V. All rights reserved.
关键词	Alpine Herbs Co2 Uptake Energy Utilization Photoinhibition Thermal Dissipation
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
学科领域	植物学
关键词[WOS]	LOW-TEMPERATURE PHOTOINHIBITION ; TROPICAL RAIN-FOREST ; PHOTOSYSTEM-II ; VARIABLE SUNLIGHT ; PHOTOSYNTHETIC RESPONSES ; HETEROMELES-ARBUTIFOLIA ; CARBON GAIN ; LEAVES ; GROWTH ; IRRADIANCE
收录类别	SCI
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
WOS类目	Plant Sciences ; Environmental Sciences
WOS记录号	WOS:000240908600018
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1315
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan
推荐引用方式 GB/T 7714	Cui, Xiaoyong,Niu, Haishan,Wu, Jing,et al. Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2006,58(1-3):149-157.
APA	Cui, Xiaoyong.,Niu, Haishan.,Wu, Jing.,Gu, Song.,Wang, Yanfen.,...&Tang, Yanhong.(2006).Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,58(1-3),149-157.
MLA	Cui, Xiaoyong,et al."Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 58.1-3(2006):149-157.

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