Response of the water-water cycle to the change in photorespiration in tobacco

doi:10.1016/j.jphotobiol.2016.02.006

	Response of the water-water cycle to the change in photorespiration in tobacco
	Huang, Wei; Yang, Ying-Jie ; Hu, Hong1 ; Zhang, Shi-Bao1
	2016-04-01
发表期刊	JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
卷号	157 页码:97-104
摘要	Photosynthetic electron transport produces ATP and NADPH, which are used by the primary metabolism. The production and consumption of ATP and NADPH must be balanced to maintain steady-state rates of CO2 assimilation and photorespiration. It has been indicated that the water water cycle (WWC) is indispensable for driving photosynthesis via increasing ATP/NADPH production. However, the relationship between the WWC and photo respiration is little known. We tested the hypothesis that the WWC responds to change in photorespiration by balancing ATP/NADPH ratio. Measurements of gas exchange and chlorophyll fluorescence were conducted in tobacco plants supplied with high (HN-plants) or low nitrogen concentration (LN-plants). The WWC was activated under high light but not low light in both HN-plants and LN-plants. HN-plants had significantly higher capacities of the WWC and photorespiration than LN-plants. Under high light, the relative high WWC activation in HN-plants was accompanied with relative low levels of NPQ compared LN-plants, suggesting that the main role of the WWC under high light was to favor ATP synthesis but not to activate NPQ Interestingly, the activation of WWC was positively correlated to the electron flow devoted to RuBP oxygenation, indicating that the WWC plays an important role in energy balancing when photorespiration is high. We conclude that the WWC is an important flexible mechanism to optimize the stoichiometry of the ATP/NADPH ratio responding to change in photorespiration. Furthermore, HN-plants enhance the WWC activity to maintain higher rates of CO2 assimilation and photorespiration. (C) 2016 Elsevier B.V. All rights reserved.
关键词	Atp Synthesis Co2 Assimilation Energy Balancing Photosynthetic Electron Flow Photorespiration Water-water Cycle
DOI	10.1016/j.jphotobiol.2016.02.006
收录类别	SCI
语种	英语
WOS记录号	WOS:000372686800010
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/26196
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, 132 Lanhei Rd, Kunming 650201, Yunnan, Peoples R China 2.Yunnan Key Lab Wild Plant Resources, Kunming 650201, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Huang, Wei,Yang, Ying-Jie,Hu, Hong,et al. Response of the water-water cycle to the change in photorespiration in tobacco[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY,2016,157:97-104.
APA	Huang, Wei,Yang, Ying-Jie,Hu, Hong,&Zhang, Shi-Bao.(2016).Response of the water-water cycle to the change in photorespiration in tobacco.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY,157,97-104.
MLA	Huang, Wei,et al."Response of the water-water cycle to the change in photorespiration in tobacco".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 157(2016):97-104.

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