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Maize, sorghum, and pearl millet have highly contrasting species strategies to adapt to water stress and climate change-like conditions

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Relation http://oar.icrisat.org/11437/
https://doi.org/10.1016/j.plantsci.2019.110297
doi:10.1016/j.plantsci.2019.110297
 
Title Maize, sorghum, and pearl millet have highly contrasting species strategies to adapt to water stress and climate change-like conditions
 
Creator Choudhary, S
Guha, A
Kholova, J
Pandravada, A
Messina, C D
Cooper, M
Vadez, V
 
Subject Climate Adaptation
Drought Tolerance
Cereals
Pearl Millet
Crop Physiology
Sorghum
Maize
 
Description This study compared maize, sorghum and pearl-millet, leading C4 cereals, for the transpiration rate (TR) response to increasing atmospheric and soil water stress. The TR response to transiently increasing VPD (0.9–4.1kPa) and the transpiration and leaf areaexpansion response to progressive soildrying were measuredin controlled conditions at early vegetative stage in 10–16 genotypes of each species grown in moderate or high vapor pressure deficit (VPD) conditions. Maize grown under moderate VPD conditions restricted TR under high VPD, but not sorghum and pearl millet. By contrast, when grown under high VPD, all species increased TR upon increasing VPD, suggesting a loss of TR responsiveness. Sorghum and pearl-millet grown under high VPD reduced leaf area, but not maize. Upon progressive soil drying, maize reduced transpiration at higher soil moisture than sorghum and pearl millet, especially under high VPD, and leaf area expansion declined at similar or lower soil moisture than transpiration in maize and sorghum. It is concluded that maize conserves water by restricting transpiration upon increasing VPD and under higher soil moisture than sorghum and millet, giving maize significantly higher TE, whereas sorghum and pearl millet rely mostly on reduced leaf area and somewhat on transpiration restriction.
 
Publisher Elsevier
 
Date 2019-10
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11437/1/Choudhary%20et%20al.%202019%20-%20Mz-Sg-Pm%20comparison.pdf
Choudhary, S and Guha, A and Kholova, J and Pandravada, A and Messina, C D and Cooper, M and Vadez, V (2019) Maize, sorghum, and pearl millet have highly contrasting species strategies to adapt to water stress and climate change-like conditions. Plant Science (TSI). p. 110297. ISSN 0168-9452