Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity
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Scholar |
Otros documentos de la autoría: Canales, Francisco J.; Rispail, Nicolas; García-Tejera, Omar; Arbona, Vicent; Pérez de Luque, Alejandro; Prats, Elena
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https://doi.org/10.1016/j.envexpbot.2020.104333 |
Metadatos
Título
Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivityAutoría
Fecha de publicación
2020-11-30Editor
ElsevierCita bibliográfica
CANALES, Francisco J., et al. Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity. Environmental and Experimental Botany, 2021, vol. 182, p. 104333.Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Drought is one of the most important constraints to crop productivity worldwide. Control of plant responses to drought is very complex. The mechanisms and their intensity may differ between species and/or genotypes ... [+]
Drought is one of the most important constraints to crop productivity worldwide. Control of plant responses to drought is very complex. The mechanisms and their intensity may differ between species and/or genotypes ultimately conditioning tolerance or susceptibility. We explore here the strategy set up by two oat cultivars to cope with drought based on root morphological, anatomical, physiological and molecular studies. A dramatic and rapid abscisic acid increase in the susceptible genotype resulted in a tight and rapid reduction of stomatal conductance. Despite of this, leaf water potential decreased concomitantly due to a decrease in root hydraulic conductivity. By contrast, the resistant genotype, showed a mild and slow increase in abscisic acid that allowed maintaining transpiration longer. This response was linked to an increase in root hydraulic conductance through an increase in total root length and in the length of the thinnest roots as well as a rise in root conductivity. This was also coupled with anatomical changes leading to a reduction of metabolic cost. These changes allowed the resistant genotype to maintain higher water potential reducing drought symptoms and promoting growth under water deficit conditions. [-]
Publicado en
Environmental and Experimental Botany, 2021, vol. 182Entidad financiadora
Ministerio de Economía y Competitividad, España | AEI/FEDER, UE | Ministerio de Ciencia, Innovación y Universidades (Spain) | Generalitat Valenciana | European Regional and Social Development Funds
Código del proyecto o subvención
AGL2016-78965AGR | PID2019-104518RB-100 | AGR-253 group | BES-2014-071044
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© 2020 Elsevier B.V. All rights reserved
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http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
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