Coordination of Cyclic Electron Flow and Water-Water Cycle Facilitates Photoprotection under Fluctuating Light and Temperature Stress in the Epiphytic Orchid Dendrobium officinale
文献类型：期刊论文
| 作者 | Sun,Hu; Shi,Qi; Zhang,Shi-Bao; Huang,Wei
|
| 刊名 | PLANTS-BASEL
 |
| 出版日期 | 2021 |
| 卷号 | 10期号:3页码:606 |
| 关键词 | Dendrobium officinale cyclic electron flow water-water cycle photosynthesis photoprotection PROTON MOTIVE FORCE PHOTOSYSTEM-I FLAVODIIRON PROTEINS HEAT-STRESS PHOTOSYNTHETIC REGULATION THYLAKOID MEMBRANES REDOX STATE PSI PHOTOINHIBITION CHLOROPHYLL |
| ISSN号 | 2223-7747 |
| DOI | 10.3390/plants10030606 |
| 英文摘要 | Photosystem I (PSI) is the primary target of photoinhibition under fluctuating light (FL). Photosynthetic organisms employ alternative electron flows to protect PSI under FL. However, the understanding of the coordination of alternative electron flows under FL at temperature stresses is limited. To address this question, we measured the chlorophyll fluorescence, P700 redox state, and electrochromic shift signal in leaves of Dendrobium officinale exposed to FL at 42 degrees C, 25 degrees C, and 4 degrees C. Upon a sudden increase in illumination at 42 degrees C and 25 degrees C, the water-water cycle (WWC) consumed a significant fraction of the extra reducing power, and thus avoided an over-reduction of PSI. However, WWC was inactivated at 4 degrees C, leading to an over-reduction of PSI within the first seconds after light increased. Therefore, the role of WWC under FL is largely dependent on temperature conditions. After an abrupt increase in light intensity, cyclic electron flow (CEF) around PSI was stimulated at any temperature. Therefore, CEF and WWC showed different temperature responses under FL. Furthermore, the enhancement of CEF and WWC at 42 degrees C quickly generated a sufficient trans-thylakoid proton gradient (Delta pH). The inactivation of WWC at 4 degrees C was partially compensated for by an increased CEF activity. These findings indicate that CEF and WWC coordinate to protect PSI under FL at temperature stresses. |
| WOS记录号 | WOS:000634074100001 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/73619]  |
| 专题 | 中国科学院昆明植物研究所 |
| 作者单位 | 1.Chinese Acad Sci, Kunming Inst Bot, Bioinnovat Ctr DR PLANT, Kunming 650201, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China 4.Southwest Univ, Coll Hort & Landscape Architecture, Chongqing 400715, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun,Hu,Shi,Qi,Zhang,Shi-Bao,et al. Coordination of Cyclic Electron Flow and Water-Water Cycle Facilitates Photoprotection under Fluctuating Light and Temperature Stress in the Epiphytic Orchid Dendrobium officinale[J]. PLANTS-BASEL,2021,10(3):606. |
| APA | Sun,Hu,Shi,Qi,Zhang,Shi-Bao,&Huang,Wei.(2021).Coordination of Cyclic Electron Flow and Water-Water Cycle Facilitates Photoprotection under Fluctuating Light and Temperature Stress in the Epiphytic Orchid Dendrobium officinale.PLANTS-BASEL,10(3),606. |
| MLA | Sun,Hu,et al."Coordination of Cyclic Electron Flow and Water-Water Cycle Facilitates Photoprotection under Fluctuating Light and Temperature Stress in the Epiphytic Orchid Dendrobium officinale".PLANTS-BASEL 10.3(2021):606. |
入库方式： OAI收割
来源：昆明植物研究所
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