Knowledge Management System of Kunming Institute of Botany,CAS
| Pre-illumination at high light significantly alleviates the over-reduction of photosystem I under fluctuating light | |
Qi-Shi; Zhang,Shi-Bao; Wang,Ji-Hua; Huang,Wei
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| 2021 | |
| Source Publication | PLANT SCIENCE
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| ISSN | 0168-9452 |
| Volume | 312Pages:111053 |
| Abstract | Photosystem I (PSI) is the primary target of photoinhibition under fluctuating light (FL). In angiosperms, cyclic electron flow (CEF) around PSI is thought to be the main player protecting PSI under FL. The activation of CEF is linked to the thylakoid stacking, which is in turn affected by light intensity. However, it is unknown how pre-illumination affects the CEF activation and PSI redox state under FL. To address this question, we conducted a spectroscopic analysis under FL in Bletilla striata and Morus alba after pre-illumination at moderate light (ML, 611 mu mol photons m(-2) s(-1)) or high light (HL, 1455 mu mol photons m(-2) s(-1)). Our results indicated that both species displayed a transient over-reduction of PSI after a transition from low to high light, but the extent of PSI overreduction under FL was largely alleviated by pre-illumination at HL when compared with pre-illumination under ML. Furthermore, pre-illumination at HL accelerated the activation rate of CEF but did not affect the activation of non-photochemical quenching and linear electron flow from photosystem II under FL. Therefore, such increased CEF activity by pre-illumination under HL alleviated PSI over-reduction under FL by facilitating the electron sink downstream of PSI. Taking together, pre-illumination at HL protects PSI under FL through acceptor-side regulation. |
| Keyword | Angiosperms Chlorophyll fluorescence Cyclic electron flow Photosynthesis Photoprotection CYCLIC ELECTRON FLOW PROTON MOTIVE FORCE THYLAKOID PROTEIN-PHOSPHORYLATION CO2 ASSIMILATION PHOTOSYNTHESIS ATP TRANSPORT PHOTOINHIBITION PHOTOPROTECTION GROWTH |
| DOI | 10.1016/j.plantsci.2021.111053 |
| WOS ID | WOS:000697190700006 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.kib.ac.cn/handle/151853/73621 |
| Collection | 中国科学院昆明植物研究所 |
| Affiliation | 1.[Qi-Shi 2.Zhang, Shi-Bao 3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China 4.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650205, Yunnan, Peoples R China |
| Recommended Citation GB/T 7714 | Qi-Shi,Zhang,Shi-Bao,Wang,Ji-Hua,et al. Pre-illumination at high light significantly alleviates the over-reduction of photosystem I under fluctuating light[J]. PLANT SCIENCE,2021,312:111053. |
| APA | Qi-Shi,Zhang,Shi-Bao,Wang,Ji-Hua,&Huang,Wei.(2021).Pre-illumination at high light significantly alleviates the over-reduction of photosystem I under fluctuating light.PLANT SCIENCE,312,111053. |
| MLA | Qi-Shi,et al."Pre-illumination at high light significantly alleviates the over-reduction of photosystem I under fluctuating light".PLANT SCIENCE 312(2021):111053. |
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