globalchange  > 过去全球变化的重建
DOI: 10.3389/fpls.2019.00609
WOS记录号: WOS:000470091800001
论文题名:
Stomatal Development and Conductance of a Tropical Forage Legume Are Regulated by Elevated [CO2] Under Moderate Warming
作者: Habermann, Eduardo1; Dias de Oliveira, Eduardo A.2; Contin, Daniele Ribeiro1; San Martin, Juca A. B.1; Curtarelli, Lucas1; Gonzalez-Meler, Miquel A.2; Martinez, Carlos Alberto1
通讯作者: Martinez, Carlos Alberto
刊名: FRONTIERS IN PLANT SCIENCE
ISSN: 1664-462X
出版年: 2019
卷: 10
语种: 英语
英文关键词: elevated CO2 ; gas exchange ; global climate change ; stomatal conductance regulation ; tropical forage legume ; warming
WOS关键词: PLANT WATER RELATIONS ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; ABSCISIC-ACID ; BIOMASS PRODUCTION ; INFRARED HEATER ; USE EFFICIENCY ; RISING CO2 ; RESPONSES ; PHOTOSYNTHESIS
WOS学科分类: Plant Sciences
WOS研究方向: Plant Sciences
英文摘要:

The opening and closing of stomata are controlled by the integration of environmental and endogenous signals. Here, we show the effects of combining elevated atmospheric carbon dioxide concentration (eCO(2); 600 mu mol mol(-1)) and warming (+2 degrees C) on stomatal properties and their consequence to plant function in a Stylosanthes capitata Vogel (C-3) tropical pasture. The eCO(2) treatment alone reduced stomatal density, stomatal index, and stomatal conductance (g(s)), resulting in reduced transpiration, increased leaf temperature, and leading to maintenance of soil moisture during the growing season. Increased CO2 concentration inside leaves stimulated photosynthesis, starch content levels, water use efficiency, and PSII photochemistry. Under warming, plants developed leaves with smaller stomata on both leaf surfaces; however, we did not see effects of warming on stomatal conductance, transpiration, or leaf water status. Warming alone enhanced PSII photochemistry and photosynthesis, and likely starch exports from chloroplasts. Under the combination of warming and eCO(2), leaf temperature was higher than that of leaves from the warming or eCO(2) treatments. Thus, warming counterbalanced the effects of CO2 on transpiration and soil water content but not on stomatal functioning, which was independent of temperature treatment. Under warming, and in combination with eCO(2), leaves also produced more carotenoids and a more efficient heat and fluorescence dissipation. Our combined results suggest that control on stomatal opening under eCO(2) was not changed by a warmer environment; however, their combination significantly improved whole-plant functioning.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/138700
Appears in Collections:过去全球变化的重建

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作者单位: 1.Univ Sao Paulo, Fac Philosophy Sci & Languages Ribeirao Preto FFC, Dept Biol, Ribeirao Preto, Brazil
2.Univ Illinois, Dept Biol Sci, Ecol & Evolut, Chicago, IL 60680 USA

Recommended Citation:
Habermann, Eduardo,Dias de Oliveira, Eduardo A.,Contin, Daniele Ribeiro,et al. Stomatal Development and Conductance of a Tropical Forage Legume Are Regulated by Elevated [CO2] Under Moderate Warming[J]. FRONTIERS IN PLANT SCIENCE,2019-01-01,10
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