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The water-water cycle is not a major alternative sink in fluctuating light at chilling temperature
Huang,Wei; Sun,Hu; Tan,Shun-Ling; Zhang,Shi-Bao
2021
发表期刊PLANT SCIENCE
ISSN0168-9452
卷号305页码:110828
摘要The water-water cycle (WWC) has the potential to alleviate photoinhibition of photosystem I (PSI) in fluctuating light (FL) at room temperature and moderate heat stress. However, it is unclear whether WWC can function as a safety valve for PSI in FL at chilling temperature. In this study, we measured P700 redox state and chlorophyll fluorescence in FL at 25 degrees C and 4 degrees C in the high WWC activity plant Dendrobium officinale. At 25 degrees C, the operation of WWC contributed to the rapid re-oxidation of P700 upon dark-to-light transition. However, such rapid reoxidation of P700 was not observed at 4 degrees C. Upon a sudden increase in light intensity, WWC rapidly consumed excess electrons in PSI and thus avoided an over-reduction of PSI at 25 degrees C. On the contrary, PSI was highly reduced within the first seconds after transition from low to high light at 4 degrees C. Therefore, in opposite to 25 degrees C, the WWC is not a major alternative sink in FL at chilling temperature. Upon transition from low to high light, cyclic electron transport was highly stimulated at 4 degrees C when compared with 25 degrees C. These results indicate that D. officinale enhances cyclic electron transport to partially compensate for the inactivation of WWC in FL at 4 degrees C.
关键词Photosynthesis Electron transfer Photosystem I Photoprotection Dendrobium officinale PHOTOSYSTEM-I
DOI10.1016/j.plantsci.2021.110828
WOS记录号WOS:000632528900002
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/73620
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, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Bioinnovat Ctr DR PLANT, Kunming 650201, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Huang,Wei,Sun,Hu,Tan,Shun-Ling,et al. The water-water cycle is not a major alternative sink in fluctuating light at chilling temperature[J]. PLANT SCIENCE,2021,305:110828.
APA Huang,Wei,Sun,Hu,Tan,Shun-Ling,&Zhang,Shi-Bao.(2021).The water-water cycle is not a major alternative sink in fluctuating light at chilling temperature.PLANT SCIENCE,305,110828.
MLA Huang,Wei,et al."The water-water cycle is not a major alternative sink in fluctuating light at chilling temperature".PLANT SCIENCE 305(2021):110828.
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