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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Stomatal Development and Conductance of a Tropical Forage Legume Are Regulated by Elevated [CO2] Under Moderate Warming

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Habermann, Eduardo [1] ; Dias de Oliveira, Eduardo A. [2] ; Contin, Daniele Ribeiro [1] ; San Martin, Juca A. B. [1] ; Curtarelli, Lucas [1] ; Gonzalez-Meler, Miquel A. [2] ; Martinez, Carlos Alberto [1]
Total Authors: 7
[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
Total Affiliations: 2
Document type: Journal article
Source: FRONTIERS IN PLANT SCIENCE; v. 10, MAY 31 2019.
Web of Science Citations: 0

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. (AU)

FAPESP's process: 14/26821-3 - Comparative analysis of water relations in C3 and C4 forage species subjected to higher CO2 and warming in TROP-T-FACE system
Grantee:Eduardo Habermann
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 14/00317-7 - Flux of carbon and greenhouse gases in a pasture ecosystem constituted by Panicum maximum Jacq. and Stylosanthes capitata Voegel cultivated under elevated CO2 and warming in a FACE/T-FACE system
Grantee:Eduardo Augusto Dias de Oliveira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 08/58075-8 - Miniface climate-change impact experiment to analyze the effects of elevated CO2 and warming on photosynthesis, gene expression, biochemistry, growth, nutrient dynamics and yield of two contrasting tropical forage species
Grantee:Carlos Alberto Martinez y Huaman
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 16/09742-8 - Water relations, gas exchange, leaf anatomy and thermographic analysis of two forage species under warming and drought stress at field conditions
Grantee:Eduardo Habermann
Support Opportunities: Scholarships in Brazil - Doctorate