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 1,2; Zhou, Guangsheng 1,3; Jiang, Yanling 1; Shi, Yaohui 1; Xu, Zhenzhu 1
刊名	ECOLOGICAL RESEARCH
	2019-11-01
卷号	34 期号:6 页码:790-801
关键词	chlorophyll fluorescence CO2 enrichment photosynthetic acclimation precipitation change Stipa baicalensis
ISSN号	0912-3814
DOI	10.1111/1440-1703.12044
通讯作者	Zhou, Guangsheng(gszhou@ibcas.ac.cn)
英文摘要	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.
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
语种	英语
出版者	WILEY
WOS记录号	WOS:000498899900009
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/130211]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhou, Guangsheng
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.