Moderate Photoinhibition of Photosystem II Protects Photosystem I from Photodamage at Chilling Stress in Tobacco Leaves

doi:10.3389/fpls.2015.00182

	Moderate Photoinhibition of Photosystem II Protects Photosystem I from Photodamage at Chilling Stress in Tobacco Leaves
	Huang, Wei1,2 ; Yang, Ying-Jie 1,2; Hu, Hong1,2 ; Zhang, Shi-Bao1,2
	2016-02-22
发表期刊	FRONTIERS IN PLANT SCIENCE
卷号	7
摘要	It has been indicated that photosystem I (PSI) is susceptible to chilling-light stress in tobacco leaves, but the effect of growth light intensity on chilling-induced PSI photoinhibition in tobacco is unclear. We examined the effects of chilling temperature (4 degrees C) associated with moderate light intensity (300 mu mol photons m(-2) s(-1)) on the activities of PSI and photosystem II (PSII) in leaves from sun-and shade-grown plants of tobacco (Nicotiana tabacum cv. k326). The sun leaves had a higher activity of alternative electron flow than the shade leaves. After 4 h chilling treatment, the sun leaves showed significantly a higher PSI photoinhibition than the shade leaves. At chilling temperature the sun leaves showed a greater electron flow from PSII to PSI, accompanying with a lower P700 oxidation ratio. When leaves were pre-treated with lincomycin, PSII activity decreased by 42% (sun leaves) and 47% (shade leaves) after 2 h exposure to the chilling-light stress, but PSI activity remained stable during the chilling-light treatment, because the electron flow from PSII to PSI was remarkably depressed. These results indicated that the stronger chilling-induced PSI photoinhibition in the sun leaves was resulted from a greater electron flow from PSII to PSI. Furthermore, moderate PSII photoinhibition depressed electron flow to PSI and then protected PSI activity against further photodamage in chilled tobacco leaves.
关键词	Chilling Temperature Electron Transfer Growth Light Intensity Photosystem i Photosystem Ii Photoprotection
DOI	10.3389/fpls.2015.00182
收录类别	SCI
语种	英语
WOS记录号	WOS:000370545900001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/25970
专题	资源植物与生物技术所级重点实验室
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming, Peoples R China 2.Yunnan Key Lab Wild Plant Resources, Kunming, Peoples R China
推荐引用方式 GB/T 7714	Huang, Wei,Yang, Ying-Jie,Hu, Hong,et al. Moderate Photoinhibition of Photosystem II Protects Photosystem I from Photodamage at Chilling Stress in Tobacco Leaves[J]. FRONTIERS IN PLANT SCIENCE,2016,7.
APA	Huang, Wei,Yang, Ying-Jie,Hu, Hong,&Zhang, Shi-Bao.(2016).Moderate Photoinhibition of Photosystem II Protects Photosystem I from Photodamage at Chilling Stress in Tobacco Leaves.FRONTIERS IN PLANT SCIENCE,7.
MLA	Huang, Wei,et al."Moderate Photoinhibition of Photosystem II Protects Photosystem I from Photodamage at Chilling Stress in Tobacco Leaves".FRONTIERS IN PLANT SCIENCE 7(2016).

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