Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growth

doi:10.1186/s12870-016-0846-9

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	Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growth
	Jiang, Yanling ; Xu, Zhenzhu ; Zhou, Guangsheng 1; Liu, Tao 1
刊名	BMC PLANT BIOLOGY
	2016
卷号	16
关键词	Elevated CO2 Grassland Mesophyll cell organelle Photosynthetic capacity Plant growth analysis Water status gradient
ISSN号	1471-2229
DOI	10.1186/s12870-016-0846-9
文献子类	Article
英文摘要	Background: The atmospheric CO2 concentration is rising continuously, and abnormal precipitation may occur more frequently in the future. Although the effects of elevated CO2 and drought on plants have been well reported individually, little is known about their interaction, particularly over a water status gradient. Here, we aimed to characterize the effects of elevated CO2 and a water status gradient on the growth, photosynthetic capacity, and mesophyll cell ultrastructure of a dominant grass from a degraded grassland. Results: Elevated CO2 stimulated plant biomass to a greater extent under moderate changes in water status than under either extreme drought or over-watering conditions. Photosynthetic capacity and stomatal conductance were also enhanced by elevated CO2 under moderate drought, but inhibited with over-watering. Severe drought distorted mesophyll cell organelles, but CO2 enrichment partly alleviated this effect. Intrinsic water use efficiency (WUEi) and total biomass water use efficiency (WUEt) were increased by elevated CO2, regardless of water status. Plant structural traits were also found to be tightly associated with photosynthetic potentials. Conclusion: The results indicated that CO2 enrichment alleviated severe and moderate drought stress, and highlighted that CO2 fertilization's dependency on water status should be considered when projecting key species' responses to climate change in dry ecosystems.
学科主题	Plant Sciences
出版地	LONDON
WOS关键词	CARBON-DIOXIDE ; CHLOROPHYLL FLUORESCENCE ; STOMATAL CONDUCTANCE ; CRESTED WHEATGRASS ; HIGH-TEMPERATURE ; DROUGHT STRESS ; USE EFFICIENCY ; CLIMATE-CHANGE ; SOIL DROUGHT ; CROP YIELD
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	BMC
WOS记录号	WOS:000379894600003
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31170456] ; China Special Fund for Meteorological Research in the Public Interest (Major projects) [GYHY201506001-3]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/24514]
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, 20 Nanxincun, Beijing 100093, Peoples R China 2.Chinese Acad Meteorol Sci, China Meteorol Adm, 46 Zhongguancun South St, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Yanling,Xu, Zhenzhu,Zhou, Guangsheng,et al. Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growth[J]. BMC PLANT BIOLOGY,2016,16.
APA	Jiang, Yanling,Xu, Zhenzhu,Zhou, Guangsheng,&Liu, Tao.(2016).Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growth.BMC PLANT BIOLOGY,16.
MLA	Jiang, Yanling,et al."Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growth".BMC PLANT BIOLOGY 16(2016).