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Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits

Many studies have demonstrated that the cotton in warm environments is vulnerable to water-limitations thus reducing the yield. A number of plant traits have been recommended to ameliorate the effects of water deficits on plant growth and yield. Limitation on maximum transpiration rate (TR) under hi...

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Autores principales: Devi, Mura Jyostna, Reddy, Vangimalla R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6218332/
https://www.ncbi.nlm.nih.gov/pubmed/30420866
http://dx.doi.org/10.3389/fpls.2018.01572
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author Devi, Mura Jyostna
Reddy, Vangimalla R.
author_facet Devi, Mura Jyostna
Reddy, Vangimalla R.
author_sort Devi, Mura Jyostna
collection PubMed
description Many studies have demonstrated that the cotton in warm environments is vulnerable to water-limitations thus reducing the yield. A number of plant traits have been recommended to ameliorate the effects of water deficits on plant growth and yield. Limitation on maximum transpiration rate (TR) under high vapor pressure deficit (VPD), usually occurs during midday, is often considered as a water conservation trait. The genotypes with this trait are desirable in high VPD environments where water deficits commonly develop in the later part of the growing season. Our objective of the study was to find the genotypic variation for the trait limited TR under high VPD and also to study leaf temperature, water potential, photosynthesis, and stomatal conductance responses. Also, our objective was also to study the structural changes in the stomatal traits when exposed to long term high VPD conditions and involvement in such responses. In the present study, 17 cotton genotypes were studied for their (TR) response to various VPD environments under well irrigated conditions. Out of 17, eight genotypes limited TR after approximately 2 kPa VPD and rest of them increased their TR with increased VPD. Five selected genotypes with different TR response to increasing VPD were further studied for gas exchange and stomatal properties. All genotypes, irrespective of exhibiting limited TR at high VPD, reduced stomatal conductance, photosynthesis and water potential at high VPD of 3.3 kPa. The genotypes with limited TR modified their stomatal traits mostly on the adaxial surface with frequent and small stomata under high VPD. The genotypes with limited TR also exhibited an increase in epidermal cell expansion and stomatal index at contrasting VPD gradients to effectively balance the liquid and vapor phase conductance to limit TR at high VPD.
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spelling pubmed-62183322018-11-12 Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits Devi, Mura Jyostna Reddy, Vangimalla R. Front Plant Sci Plant Science Many studies have demonstrated that the cotton in warm environments is vulnerable to water-limitations thus reducing the yield. A number of plant traits have been recommended to ameliorate the effects of water deficits on plant growth and yield. Limitation on maximum transpiration rate (TR) under high vapor pressure deficit (VPD), usually occurs during midday, is often considered as a water conservation trait. The genotypes with this trait are desirable in high VPD environments where water deficits commonly develop in the later part of the growing season. Our objective of the study was to find the genotypic variation for the trait limited TR under high VPD and also to study leaf temperature, water potential, photosynthesis, and stomatal conductance responses. Also, our objective was also to study the structural changes in the stomatal traits when exposed to long term high VPD conditions and involvement in such responses. In the present study, 17 cotton genotypes were studied for their (TR) response to various VPD environments under well irrigated conditions. Out of 17, eight genotypes limited TR after approximately 2 kPa VPD and rest of them increased their TR with increased VPD. Five selected genotypes with different TR response to increasing VPD were further studied for gas exchange and stomatal properties. All genotypes, irrespective of exhibiting limited TR at high VPD, reduced stomatal conductance, photosynthesis and water potential at high VPD of 3.3 kPa. The genotypes with limited TR modified their stomatal traits mostly on the adaxial surface with frequent and small stomata under high VPD. The genotypes with limited TR also exhibited an increase in epidermal cell expansion and stomatal index at contrasting VPD gradients to effectively balance the liquid and vapor phase conductance to limit TR at high VPD. Frontiers Media S.A. 2018-10-30 /pmc/articles/PMC6218332/ /pubmed/30420866 http://dx.doi.org/10.3389/fpls.2018.01572 Text en Copyright © 2018 Devi and Reddy. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Devi, Mura Jyostna
Reddy, Vangimalla R.
Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits
title Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits
title_full Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits
title_fullStr Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits
title_full_unstemmed Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits
title_short Transpiration Response of Cotton to Vapor Pressure Deficit and Its Relationship With Stomatal Traits
title_sort transpiration response of cotton to vapor pressure deficit and its relationship with stomatal traits
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6218332/
https://www.ncbi.nlm.nih.gov/pubmed/30420866
http://dx.doi.org/10.3389/fpls.2018.01572
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