Decreased photosystem II activity facilitates acclimation to fluctuating light in the understory plant Paris polyphylla

doi:10.1016/j.bbabio.2019.148135

	Decreased photosystem II activity facilitates acclimation to fluctuating light in the understory plant Paris polyphylla
	Sun, Hu 1,2; Zhang, Shi-Bao1 ; Liu, Tao 3; Huang, Wei1
通讯作者	Liu, Tao(52133490@qq.com) ; Huang, Wei(huangwei@mail.kib.ac.cn)
	2020-02-01
发表期刊	BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
ISSN	0005-2728
卷号	1861 期号:2 页码:8
摘要	In forests, understory plants are usually exposed to sunflecks on timescales of seconds or minutes. However, it is unclear how understory plants acclimate to fluctuating light. In this study, we compared chlorophyll fluorescence, PSI redox state and the electrochromic shift signal under fluctuating light between an understory plant Paris polyphylla (Liliaceae) and a light-demanding plant Bletilla striata (Orchidaceae). Within the first seconds after transition from low to high light, PSI was highly oxidized in P. polyphylla but was highly reduced in B. striata, although both species could not generate a sufficient trans-thylakoid proton gradient (Delta pH). Furthermore, the outflow of electrons from PSI to O-2 was not significant in P. polyphylla, as indicated by the P700 redox kinetics upon dark-to-light transition. Therefore, the different responses of PSI to fluctuating light between P. polyphylla and B. striata could not be explained by Delta pH formation or alternative electron transport. In contrast, upon a sudden transition from low to high light, electron flow from PSII was much lower in P. polyphylla than in B. striata, suggesting that the rapid oxidation of PSI in P. polyphylla was largely attributed to the lower PSII activity. We propose, for the first time, that down-regulation of PSII activity is an important strategy used by some understory angiosperms to cope with sunflecks.
关键词	Electron transfer Fluctuating light Photoinhibition Photoprotection Photosynthesis Understory angiosperms
DOI	10.1016/j.bbabio.2019.148135
收录类别	SCI ; SCI
语种	英语
WOS记录号	WOS:000508749700007
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/70635
专题	资源植物与生物技术所级重点实验室
通讯作者	Liu, Tao; Huang, Wei
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Yunnan Agr Univ, Natl Local Joint Engn Res Ctr Germplasm Utilizat, Kunming 650201, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Sun, Hu,Zhang, Shi-Bao,Liu, Tao,et al. Decreased photosystem II activity facilitates acclimation to fluctuating light in the understory plant Paris polyphylla[J]. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,2020,1861(2):8.
APA	Sun, Hu,Zhang, Shi-Bao,Liu, Tao,&Huang, Wei.(2020).Decreased photosystem II activity facilitates acclimation to fluctuating light in the understory plant Paris polyphylla.BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,1861(2),8.
MLA	Sun, Hu,et al."Decreased photosystem II activity facilitates acclimation to fluctuating light in the understory plant Paris polyphylla".BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1861.2(2020):8.