Photosynthetic acclimation and leaf traits of Stipa bungeana in response to elevated CO2 under five different watering conditions

doi:10.1093/pcp/pcx081

	Photosynthetic acclimation and leaf traits of Stipa bungeana in response to elevated CO2 under five different watering conditions
	Wang, H.; Zhou, G. S.; Jiang, Y. L.; Shi, Y. H.; Xu, Z. Z.
	2017
发表期刊	PHOTOSYNTHETICA
ISSN	0300-3604
卷号	55 期号:1 页码:164-175
摘要	Although plant performance under elevated CO2 (EC) and drought has been extensively studied, little is known about the leaf traits and photosynthetic performance of Stipa bungeana under EC and a water deficiency gradient. In order to investigate the effects of EC, watering, and their combination, S. bungeana seedlings were exposed to two CO2 regimes (ambient, CA: 390 ppm; elevated, EC: 550 ppm) and five levels of watering (-30%, -15%, control, +15%, +30%) from 1 June to 31 August in 2011, where the control water level was 240 mm. Gas exchange and leaf traits were measured after 90-d treatments. Gas-exchange characteristics, measured at the growth CA, indicated that EC significantly decreased the net photosynthetic rate (P (N)), water-use efficiency, nitrogen concentration based on mass, chlorophyll and malondialdehyde (MDA) content, while increased stomatal conductance (g (s)), intercellular CO2 concentration (C (i)), dark respiration, photorespiration, carbon concentration based on mass, C/N ratio, and leaf water potential. Compared to the effect of EC, watering showed an opposite trend only in case of P (N). The combination of both factors showed little influence on these physiological indicators, except for g (s), C (i), and MDA content. Photosynthetic acclimation to EC was attributed to the N limitation, C sink/source imbalance, and the decline of photosynthetic activity. The watering regulated photosynthesis through both stomatal and nonstomatal mechanisms. Our study also revealed that the effects of EC on photosynthesis were larger than those on respiration and did not compensate for the adverse effects of drought, suggesting that a future warm and dry climate might be unfavorable to S. bungeana. However, the depression of the growth of S. bungeana caused by EC was time-dependent at a smaller temporal scale.
关键词	climate change carbon balance gas exchange respiration chlorophyll fluorescence
学科领域	Plant Sciences ; Cell Biology
DOI	10.1093/pcp/pcx081
收录类别	SCI
语种	英语
WOS关键词	ATMOSPHERIC CARBON-DIOXIDE ; CLIMATE-CHANGE ; USE EFFICIENCY ; GAS-EXCHANGE ; STOMATAL CONDUCTANCE ; CHLOROPHYLL FLUORESCENCE ; PRECIPITATION CHANGE ; ANTIOXIDANT SYSTEMS ; DROUGHT STRESS ; LOESS PLATEAU
WOS记录号	WOS:000410155800011
出版者	ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
文献子类	Article
出版地	6 PRAGUE
EISSN	1573-9058
资助机构	State Key Development Program of Basic Research [2010CB951300] ; Strategic Priority Research Program-Climate Change: Carbon Budget and Related Issues of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050408]
作者邮箱	gszhou@ibcas.ac.cn
作品OA属性	Bronze
引用统计	被引频次：50[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/2S10CLM1/22046
专题	植被与环境变化国家重点实验室
作者单位	1.[Wang, H. 2.Jiang, Y. L. 3.Xu, Z. Z.] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.[Wang, H.] Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.[Zhou, G. S. 6.Shi, Y. H.] Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Wang, H.,Zhou, G. S.,Jiang, Y. L.,et al. Photosynthetic acclimation and leaf traits of Stipa bungeana in response to elevated CO2 under five different watering conditions[J]. PHOTOSYNTHETICA,2017,55(1):164-175.
APA	Wang, H.,Zhou, G. S.,Jiang, Y. L.,Shi, Y. H.,&Xu, Z. Z..(2017).Photosynthetic acclimation and leaf traits of Stipa bungeana in response to elevated CO2 under five different watering conditions.PHOTOSYNTHETICA,55(1),164-175.
MLA	Wang, H.,et al."Photosynthetic acclimation and leaf traits of Stipa bungeana in response to elevated CO2 under five different watering conditions".PHOTOSYNTHETICA 55.1(2017):164-175.

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