Photosynthesis and Photosynthetic Electron Flow in the Alpine Evergreen Species Quercus guyavifolia in Winter

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	Photosynthesis and Photosynthetic Electron Flow in the Alpine Evergreen Species Quercus guyavifolia in Winter
	Huang, Wei; Hu, Hong; Zhang, Shi-Bao
刊名	FRONTIERS IN PLANT SCIENCE
	2016-10-20
卷号	7 期号:1 页码:1
关键词	alpine evergreen broadleaf species alternative electron flow low night temperature mesophyll conductance photorespiration photosynthesis
英文摘要	Alpine evergreen broadleaf tree species must regularly cope with low night temperatures in winter. However, the effects of low night temperatures on photosynthesis in alpine evergreen broadleaf tree species are unclear. We measured the diurnal photosynthetic parameters before and after cold snap for leaves of Quercus guyavifolia growing in its native habitat at 3290 m. On 11 and 12 December 2013 (before cold snap), stomatal and mesophyll conductances (g(s) and g(m)), CO2 assimilation rate (A(n)), and total electron flow through PSII (J(PSII)) at daytime were maintained at high levels. The major action of alternative electron flow was to provide extra ATP for primary metabolisms. On 20 December 2013 (after cold snap), the diurnal values of g(s), g(m), A(n), and J(PSII) at daytime largely decreased, mainly due to the large decrease in night air temperature. Meanwhile, the ratio of photorespiration and alternative electron flow to J(PSII) largely increased on 20 December. Furthermore, the high levels of alternative electron flow were accompanied with low rates of extra ATP production. A quantitative limitation analysis reveals that the g(m) limitation increased on 20 December with decreased night air temperature. Therefore, the night air temperature was an important determinant of stomatal/mesophyll conductance and photosynthesis. When photosynthesis is inhibited following freezing night temperatures, photorespiration and alternative electron flow are important electron sinks, which support the role of photorespiration and alternative electron flow in photoportection for alpine plants under low temperatures.
类目[WOS]	Plant Sciences
研究领域[WOS]	Plant Sciences
关键词[WOS]	PLASTID TERMINAL OXIDASE ; WATER-WATER CYCLE ; GAS-EXCHANGE MEASUREMENTS ; MESOPHYLL CONDUCTANCE ; CHLOROPHYLL FLUORESCENCE ; RANUNCULUS-GLACIALIS ; TEMPERATURE RESPONSE ; PHYSIOLOGICAL FUNCTIONS ; SOLDANELLA-ALPINA ; CO2 ASSIMILATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000385886600001
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn/handle/151853/33635]
专题	昆明植物研究所_资源植物与生物技术所级重点实验室
作者单位	Chinese Acad Sci, Key Lab Econ Plants & Biotechnol, Kunming Inst Bot, Kunming, Peoples R China
推荐引用方式 GB/T 7714	Huang, Wei,Hu, Hong,Zhang, Shi-Bao. Photosynthesis and Photosynthetic Electron Flow in the Alpine Evergreen Species Quercus guyavifolia in Winter[J]. FRONTIERS IN PLANT SCIENCE,2016,7(1):1.
APA	Huang, Wei,Hu, Hong,&Zhang, Shi-Bao.(2016).Photosynthesis and Photosynthetic Electron Flow in the Alpine Evergreen Species Quercus guyavifolia in Winter.FRONTIERS IN PLANT SCIENCE,7(1),1.
MLA	Huang, Wei,et al."Photosynthesis and Photosynthetic Electron Flow in the Alpine Evergreen Species Quercus guyavifolia in Winter".FRONTIERS IN PLANT SCIENCE 7.1(2016):1.