Chloroplastic ATP Synthase Alleviates Photoinhibition of Photosystem I in Tobacco Illuminated at Chilling Temperature

	Chloroplastic ATP Synthase Alleviates Photoinhibition of Photosystem I in Tobacco Illuminated at Chilling Temperature
	Yang, Ying-Jie 1,2; Zhang, Shi-Bao1 ; Huang, Wei1
	2018-11-14
发表期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
卷号	9 页码:10
摘要	Chloroplastic ATP synthase plays a significant role in the regulation of proton motive force (pmf) and proton gradient (Delta pH) across the thylakoid membranes. However, the regulation of chloroplastic ATP synthase at chilling temperature and its role in photoprotection are little known. In our present study, we examined the chlorophyll fluorescence, P700 signal, and electrochromic shift signal at 25 degrees C, and 6 degrees C in tobacco (Nicotiana tabacum L.cv. Samsun). Although photosynthetic electron flow through both PSI and PSII were severely inhibited at 6 degrees C, non-photochemical quenching and P700 oxidation ratio were largely increased. During the photosynthetic induction under high light, the formation of pmf at 6 degrees C was similar to that at 25 degrees C. However, the pH was significantly higher at 6 degrees C, owing to the decreased activity of chloroplastic ATP synthase (g(H)(+)). During illumination at 6 degrees C and high light, a high Delta pH made PSI to be highly oxidized, preventing PSI from photoinhibition. These results indicate that the downregulation of g(H)(+) is critical to the buildup of Delta pH at low temperature, adjusting the redox state of PSI, and thus preventing photodamage to PSI. Our findings highlight the importance of chloroplastic ATP synthase in photoprotection at chilling temperature.
关键词	chilling temperature chloroplastic ATP synthase proton motive force Delta pH photosystem I photoprotection
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/63159
专题	资源植物与生物技术所级重点实验室
通讯作者	Zhang, Shi-Bao; Huang, Wei
作者单位	1.Chinese Acad Sci, Key Lab Econ Plants & Biotechnol, Kunming Inst Bot, Kunming, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yang, Ying-Jie,Zhang, Shi-Bao,Huang, Wei. Chloroplastic ATP Synthase Alleviates Photoinhibition of Photosystem I in Tobacco Illuminated at Chilling Temperature[J]. FRONTIERS IN PLANT SCIENCE,2018,9:10.
APA	Yang, Ying-Jie,Zhang, Shi-Bao,&Huang, Wei.(2018).Chloroplastic ATP Synthase Alleviates Photoinhibition of Photosystem I in Tobacco Illuminated at Chilling Temperature.FRONTIERS IN PLANT SCIENCE,9,10.
MLA	Yang, Ying-Jie,et al."Chloroplastic ATP Synthase Alleviates Photoinhibition of Photosystem I in Tobacco Illuminated at Chilling Temperature".FRONTIERS IN PLANT SCIENCE 9(2018):10.