The water-water cycle is not a major alternative sink in fluctuating light at chilling temperature

doi:10.1016/j.plantsci.2021.110828

KIB OpenIR

	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
ISSN	0168-9452
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
DOI	10.1016/j.plantsci.2021.110828
WOS记录号	WOS:000632528900002
引用统计
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
推荐引用方式 GB/T 7714	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.