Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity
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.
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Elsevier
2021-02
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Subjects: | Abscisic acid, Drought, Hydraulic conductance, Oat, Root morphology, Transpiration, |
Online Access: | http://hdl.handle.net/10261/241450 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011011 http://dx.doi.org/10.13039/501100003329 |
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dig-ias-es-10261-2414502022-02-01T05:30:53Z Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity Canales, Francisco José Rispail, Nicolas García-Tejera, Omar Arbona, Vicent Pérez de Luque, Alejandro Prats, Elena Ministerio de Economía y Competitividad (España) European Commission Ministerio de Ciencia, Innovación y Universidades (España) Junta de Andalucía Abscisic acid Drought Hydraulic conductance Oat Root morphology Transpiration 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. This work was supported by the Spanish Ministry of Economy and Competitiveness [AGL2016-78965AGR], (AEI/FEDER, UE), Spanish Ministry of Science and Innovation [PID2019-104518RB-100], and regional government through the AGR-253 group, the European Regional and Social Development Funds. FJC is holder of a FPI fellowship from the Spanish Ministry of Economy and Competitiveness [BES-2014-071044]. 2021-05-24T09:20:06Z 2021-05-24T09:20:06Z 2021-02 2021-05-24T09:20:07Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.envexpbot.2020.104333 issn: 0098-8472 Environmental and Experimental Botany 182: 104333 (2021) http://hdl.handle.net/10261/241450 10.1016/j.envexpbot.2020.104333 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011011 http://dx.doi.org/10.13039/501100003329 #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AGL2016-78965 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104518RB-100 Postprint http://doi.org/10.1016/j.envexpbot.2020.104333 Sí open Elsevier |
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Abscisic acid Drought Hydraulic conductance Oat Root morphology Transpiration Abscisic acid Drought Hydraulic conductance Oat Root morphology Transpiration |
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Abscisic acid Drought Hydraulic conductance Oat Root morphology Transpiration Abscisic acid Drought Hydraulic conductance Oat Root morphology Transpiration Canales, Francisco José Rispail, Nicolas García-Tejera, Omar Arbona, Vicent Pérez de Luque, Alejandro Prats, Elena Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity |
description |
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. |
author2 |
Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Canales, Francisco José Rispail, Nicolas García-Tejera, Omar Arbona, Vicent Pérez de Luque, Alejandro Prats, Elena |
format |
artículo |
topic_facet |
Abscisic acid Drought Hydraulic conductance Oat Root morphology Transpiration |
author |
Canales, Francisco José Rispail, Nicolas García-Tejera, Omar Arbona, Vicent Pérez de Luque, Alejandro Prats, Elena |
author_sort |
Canales, Francisco José |
title |
Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity |
title_short |
Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity |
title_full |
Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity |
title_fullStr |
Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity |
title_full_unstemmed |
Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity |
title_sort |
drought resistance in oat involves aba-mediated modulation of transpiration and root hydraulic conductivity |
publisher |
Elsevier |
publishDate |
2021-02 |
url |
http://hdl.handle.net/10261/241450 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011011 http://dx.doi.org/10.13039/501100003329 |
work_keys_str_mv |
AT canalesfranciscojose droughtresistanceinoatinvolvesabamediatedmodulationoftranspirationandroothydraulicconductivity AT rispailnicolas droughtresistanceinoatinvolvesabamediatedmodulationoftranspirationandroothydraulicconductivity AT garciatejeraomar droughtresistanceinoatinvolvesabamediatedmodulationoftranspirationandroothydraulicconductivity AT arbonavicent droughtresistanceinoatinvolvesabamediatedmodulationoftranspirationandroothydraulicconductivity AT perezdeluquealejandro droughtresistanceinoatinvolvesabamediatedmodulationoftranspirationandroothydraulicconductivity AT pratselena droughtresistanceinoatinvolvesabamediatedmodulationoftranspirationandroothydraulicconductivity |
_version_ |
1777663311321497600 |