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Decreased photosystem II activity facilitates acclimation to fluctuating light in the understory plant Paris polyphylla
Sun, Hu1,2; Zhang, Shi-Bao1; Liu, Tao3; Huang, Wei1
Corresponding AuthorLiu, Tao(52133490@qq.com) ; Huang, Wei(huangwei@mail.kib.ac.cn)
2020-02-01
Source PublicationBIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
ISSN0005-2728
Volume1861Issue:2Pages:8
AbstractIn 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.
KeywordElectron transfer Fluctuating light Photoinhibition Photoprotection Photosynthesis Understory angiosperms
DOI10.1016/j.bbabio.2019.148135
Indexed BySCI ; SCI
Language英语
WOS IDWOS:000508749700007
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/70635
Collection资源植物与生物技术所级重点实验室
Corresponding AuthorLiu, Tao; Huang, Wei
Affiliation1.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
Recommended Citation
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.
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