Photosystem I is tolerant to fluctuating light under moderate heat stress in two orchids Dendrobium officinale and Bletilla striata
文献类型：期刊论文
| 作者 | Yang,Ying-Jie; Tan,Shun-Ling; Sun,Hu; Huang,Jia-Lin; Huang,Wei ; Zhang,Shi-Bao
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| 刊名 | PLANT SCIENCE
 |
| 出版日期 | 2021 |
| 卷号 | 303页码:110795 |
| 关键词 | Dendrobium officinale Photoinhibition Photoprotection Photosystem I Photosystem II Water-water cycle PROTON MOTIVE FORCE CYCLIC ELECTRON FLOW FLAVODIIRON PROTEINS EXCITATION-ENERGY CHLOROPHYLL FLUORESCENCE CO2 ASSIMILATION PHOTOSYNTHESIS TRANSPORT PHOTOINHIBITION PHOTOPROTECTION |
| ISSN号 | 0168-9452 |
| DOI | 10.1016/j.plantsci.2020.110795 |
| 英文摘要 | Under natural field conditions, plants usually experience fluctuating light (FL) under moderate heat stress in summer. However, responses of photosystems I and II (PSI and PSII) to such combined stresses are not well known. Furthermore, the role of water-water cycle (WWC) in photoprotection in FL under moderate heat stress is poorly understood. In this study, we examined chlorophyll fluorescence and P700 redox state in FL at 42 degrees C in two orchids, Dendrobium officinale (with high WWC activity) and Bletilla striata (with low WWC activity). After FL treatment at 42 degrees C, PSI activity maintained stable while PSII activity decreased significantly in these two orchids. In D. officinale, the WWC could rapidly consume the excess excitation energy in PSI and thus avoided an over-reduction of PSI upon any increase in illumination. Therefore, in D. officinale, WWC likely protected PSI in FL at 42 degrees C. In B. striata, heat-induced PSII photoinhibition down-regulated electron flow from PSII and thus prevented an over-reduction of PSI after transition from low to high light. Consequently, in B. striata moderate PSII photoinhibition could protected PSI in FL at 42 degrees C. We conclude that, in addition to cyclic electron flow, WWC and PSII photoinhibition-repair cycle are two important strategies for preventing PSI photoinhibition in FL under moderate heat stress. |
| WOS记录号 | WOS:000614153400009 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/73617]  |
| 专题 | 中国科学院昆明植物研究所 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Bioinnovat Ctr DR PLANT, Kunming 650201, Yunnan, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang,Ying-Jie,Tan,Shun-Ling,Sun,Hu,et al. Photosystem I is tolerant to fluctuating light under moderate heat stress in two orchids Dendrobium officinale and Bletilla striata[J]. PLANT SCIENCE,2021,303:110795. |
| APA | Yang,Ying-Jie,Tan,Shun-Ling,Sun,Hu,Huang,Jia-Lin,Huang,Wei,&Zhang,Shi-Bao.(2021).Photosystem I is tolerant to fluctuating light under moderate heat stress in two orchids Dendrobium officinale and Bletilla striata.PLANT SCIENCE,303,110795. |
| MLA | Yang,Ying-Jie,et al."Photosystem I is tolerant to fluctuating light under moderate heat stress in two orchids Dendrobium officinale and Bletilla striata".PLANT SCIENCE 303(2021):110795. |
入库方式： OAI收割
来源：昆明植物研究所
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