Responses of Photosystem I Compared with Photosystem II to Fluctuating Light in the Shade-Establishing Tropical Tree Species Psychotria henryi

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 植物生理生态研究组

	Responses of Photosystem I Compared with Photosystem II to Fluctuating Light in the Shade-Establishing Tropical Tree Species Psychotria henryi
	Huang, Wei ; Yang, Ying-Jie ; Hu, Hong ; Zhang,Shi-Bao
刊名	FRONTIERS IN PLANT SCIENCE
	2016
卷号	7 期号:x 页码:1549
关键词	constant high light fluctuating light PSI photoinhibition excess excitation energy shade-establishing species
中文摘要	Shade-establishing plants growing in the forest understory are exposed to constant high light or fluctuating light when gaps are created by fallen trees. Our previous studies indicate that photosystem I (PSI) is sensitive to constant high light in shade-establishing tree species, however, the effects of fluctuating light on PSI and photosystem II (PSII) in shade-establishing species are little known. In the present study, we examined the responses of PSI and PSII to fluctuating light in comparison to constant high light in the shade-establishing species Psychotria henryi. Accompanying with significant activation of cyclic electron flow (CEF), the P700 oxidation ratio was maintained at high levels when exposed to strong light either under fluctuating light or constant high light. Under moderate fluctuating light, PSI and PSII activities were remained stable in P. henryi. Interestingly, PSI was insusceptible to fluctuating light but sensitive to constant high light in P. henryi. Furthermore, both PSI and PSII were more sensitive to constant high light than fluctuating light. These results suggest that CEF is essential for photoprotection of PSI under fluctuating light in P. henryi. Furthermore, photoinhibition of PSI under high light in P. henry is more related to the accumulation of reactive oxygen species rather than to P700 redox state, which is different from the mechanisms of PSI photoinhibition in Arabidopsis thaliana and rice. Taking together, PSI is a key determiner of photosynthetic responses to fluctuating light and constant high light in the shade-establishing species P. henryi.
语种	英语
公开日期	2016-11-17
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/10090]
专题	西双版纳热带植物园_植物生理生态研究组
推荐引用方式 GB/T 7714	Huang, Wei,Yang, Ying-Jie,Hu, Hong,et al. Responses of Photosystem I Compared with Photosystem II to Fluctuating Light in the Shade-Establishing Tropical Tree Species Psychotria henryi[J]. FRONTIERS IN PLANT SCIENCE,2016,7(x):1549.
APA	Huang, Wei,Yang, Ying-Jie,Hu, Hong,&Zhang,Shi-Bao.(2016).Responses of Photosystem I Compared with Photosystem II to Fluctuating Light in the Shade-Establishing Tropical Tree Species Psychotria henryi.FRONTIERS IN PLANT SCIENCE,7(x),1549.
MLA	Huang, Wei,et al."Responses of Photosystem I Compared with Photosystem II to Fluctuating Light in the Shade-Establishing Tropical Tree Species Psychotria henryi".FRONTIERS IN PLANT SCIENCE 7.x(2016):1549.