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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, Guangsheng1; Liu, Tao1 | |
2016 | |
发表期刊 | BMC PLANT BIOLOGY |
ISSN | 1471-2229 |
卷号 | 16 |
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. |
关键词 | Elevated CO2 Grassland Mesophyll cell organelle Photosynthetic capacity Plant growth analysis Water status gradient |
学科领域 | Plant Sciences |
DOI | 10.1186/s12870-016-0846-9 |
收录类别 | SCI |
语种 | 英语 |
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) |
WOS记录号 | WOS:000379894600003 |
出版者 | BMC |
文献子类 | Article |
出版地 | LONDON |
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] |
作者邮箱 | xuzz@ibcas.ac.cn ; gszhou@ibcas.ac.cn |
作品OA属性 | Green Published, gold |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/25162 |
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). |
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