Stomatal Development and Conductance of a Tropical Forage Legume Are Regulated by Elevated [CO2] Under Moderate Warming
| Autor: | Miquel A. Gonzalez-Meler, Juca Abramo Barrera San Martin, Eduardo Augusto Dias de Oliveira, Lucas Curtarelli, Eduardo Habermann, Daniele Ribeiro Contin, Carlos Alberto Martinez |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Stomatal conductance
warming Growing season Plant Science gas exchange lcsh:Plant culture Photosynthesis purl.org/becyt/ford/1 [https] GLOBAL CLIMATE CHANGE WARMING lcsh:SB1-1110 Water-use efficiency purl.org/becyt/ford/1.6 [https] Water content Transpiration Original Research Carbon dioxide in Earth's atmosphere elevated CO2 Chemistry Global warming fungi tropical forage legume global climate change food and beverages stomatal conductance regulation TROPICAL FORAGE LEGUME Horticulture GAS EXCHANGE STOMATAL CONDUCTANCE REGULATION ELEVATED CO2 |
| Zdroj: | Frontiers in Plant Science, Vol 10 (2019) Frontiers in Plant Science CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.3389/fpls.2019.00609/full |
| Popis: | 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 (eCO2; 600 μmol mol-1) and warming (+2°C) on stomatal properties and their consequence to plant function in a Stylosanthes capitata Vogel (C3) tropical pasture. The eCO2 treatment alone reduced stomatal density, stomatal index, and stomatal conductance (gs), 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 eCO2, leaf temperature was higher than that of leaves from the warming or eCO2 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 eCO2, leaves also produced more carotenoids and a more efficient heat and fluorescence dissipation. Our combined results suggest that control on stomatal opening under eCO2 was not changed by a warmer environment; however, their combination significantly improved whole-plant functioning. Fil: Habermann, Eduardo. Universidade de Sao Paulo; Brasil Fil: Dias de Oliveira, Eduardo A.. University of Illinois; Estados Unidos Fil: Contin, Daniele Ribeiro. Universidade de Sao Paulo; Brasil Fil: Abramo Barrera San Martin, Juca. Universidade de Sao Paulo; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentina Fil: Curtarelli, Lucas. Universidade de Sao Paulo; Brasil Fil: Gonzalez Meler, Miquel A.. University of Illinois; Estados Unidos Fil: Martinez, Carlos Alberto. Universidade de Sao Paulo; Brasil |
| Databáze: | OpenAIRE |
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