Effects of elevated CO2 on Stipa baicalensis photosynthesis depend on precipitation and growth phase

doi:10.1111/1440-1703.12044

	Effects of elevated CO2 on Stipa baicalensis photosynthesis depend on precipitation and growth phase
	Wang, Hui 1; Zhou, Guangsheng 2; Jiang, Yanling ; Shi, Yaohui ; Xu, Zhenzhu
	2019
发表期刊	ECOLOGICAL RESEARCH
ISSN	0912-3814
卷号	34 期号:6 页码:790-801
摘要	Elevated atmospheric CO2 concentration and simultaneous precipitation change affect plant physiology and growth either directly or indirectly. The main objective of this study was to investigate the effects of elevated CO2 and precipitation change, alone or in combination, on photosynthesis and growth in Stipa baicalensis under differential growth phases. Elevated CO2 showed a consistently significant increase in net photosynthesis rate (A(net)), water-use efficiency (WUE), leaf area and biomass. However, elevated CO2 did not mitigate the negative effects of severe drought stress. Increase of A(net) under elevated CO2 attributed to C-i in the early growth phase, but WUE and Rubisco carboxylation (V-cmax) was the main inductor in the later growth phase. Effects of elevated CO2 on S. baicalensis were closely associated with precipitation conditions, and the influence on photosynthetic capacity was also related to the growth phase. Drought significantly reduced A(net) in June and August, increased WUE in June but did not show effect in August. Precipitation enhancement was beneficial to leaf area and biomass accumulation. Elevated CO2 and enhanced precipitation in combination promoted A(net) by 158% and 93.4% in June and August, respectively; moreover, their interaction increased the total biomass by 44.4%. Our results suggested that the elevated CO2 concentration in the future might be beneficial to the growth of S. baicalensis, but elevated CO2 influence on S. baicalensis might strongly depend on precipitation conditions and the growth phase.
关键词	chlorophyll fluorescence CO2 enrichment photosynthetic acclimation precipitation change Stipa baicalensis
学科领域	Ecology
DOI	10.1111/1440-1703.12044
收录类别	SCI
语种	英语
WOS关键词	CARBON-DIOXIDE CONCENTRATION ; WATER-USE EFFICIENCY ; ATMOSPHERIC CO2 ; DROUGHT STRESS ; YIELD RESPONSES ; ENRICHMENT FACE ; GAS-EXCHANGE ; C-4 GRASSES ; PLANT ; TEMPERATURE
WOS研究方向	Environmental Sciences & Ecology
WOS记录号	WOS:000498899900009
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1440-1703
作者邮箱	gszhou@ibcas.ac.cn
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/19397
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China 3.Chinese Acad Meteorol Sci, Inst Ecol Environm & Agrometeorol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hui,Zhou, Guangsheng,Jiang, Yanling,et al. Effects of elevated CO2 on Stipa baicalensis photosynthesis depend on precipitation and growth phase[J]. ECOLOGICAL RESEARCH,2019,34(6):790-801.
APA	Wang, Hui,Zhou, Guangsheng,Jiang, Yanling,Shi, Yaohui,&Xu, Zhenzhu.(2019).Effects of elevated CO2 on Stipa baicalensis photosynthesis depend on precipitation and growth phase.ECOLOGICAL RESEARCH,34(6),790-801.
MLA	Wang, Hui,et al."Effects of elevated CO2 on Stipa baicalensis photosynthesis depend on precipitation and growth phase".ECOLOGICAL RESEARCH 34.6(2019):790-801.

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