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

	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
刊名	ENVIRONMENTAL AND EXPERIMENTAL BOTANY ; Cui Xiaoyong, Niu Haishan,Wu Jing,Gu Song, Wang Yanfen, Wang Shiping, Zhao Xinquan,Tang Yanhong. Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2006,58(1-3):149-157
	2006-12-01
英文摘要	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.
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1315]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
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, Cui Xiaoyong, Niu Haishan,Wu Jing,Gu Song, Wang Yanfen, Wang Shiping, Zhao Xinquan,Tang Yanhong. Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2006,58(1-3):149-157,2006.
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.
MLA	Cui, Xiaoyong,et al."Response of chlorophyll fluorescence to dynamic light in three alpine species differing in plant architecture".ENVIRONMENTAL AND EXPERIMENTAL BOTANY (2006).