Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.envexpbot.2020.104233 http://hdl.handle.net/11449/200907 |
Resumo: | Many studies ask how aluminum (Al) reduces the root growth, but as Al is mostly retained in the root system, physiological explanations for the also expected Al-induced decrease in stomatal conductance (gs) are unclear, mainly in well-watered conditions. We exposed tomato plants (Solanum lycopersicum) to 0, 25, 50 and 100 μM Al in nutrient solution to investigate whether Al impairs root hydraulic conductance (Lpr), affecting leaf water potential (Ψleaf) and possibly inducing abscisic acid (ABA) accumulation in roots and/or leaves. We also measured ABA delivery rate, xylem sap pH and the root/leaf area ratio in order to explain the low gs in plants exposed to Al. Declines in Lpr and gs were proportional to the increase in Al concentration, and all Al treatments similarly decreased Ψleaf, indicating the plant's attempt to reduce water loss through transpiration while accumulating more ABA. Despite Al-induced increases in root ABA, the root-to-shoot delivery of ABA did not enhance, but Al caused root xylem sap alkalization. Despite the stability of root/leaf area ratio across a range of Al concentrations (0, 25 and 50 μM Al), the leaf hydration and stomatal opening was not conserved. Here we provide the first evidence that decreases in Lpr and increases in ABA might explain Al-induced stomatal closure. |
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Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulationAbscisic acidAluminumStomatal conductanceWater transportXylem sap pHMany studies ask how aluminum (Al) reduces the root growth, but as Al is mostly retained in the root system, physiological explanations for the also expected Al-induced decrease in stomatal conductance (gs) are unclear, mainly in well-watered conditions. We exposed tomato plants (Solanum lycopersicum) to 0, 25, 50 and 100 μM Al in nutrient solution to investigate whether Al impairs root hydraulic conductance (Lpr), affecting leaf water potential (Ψleaf) and possibly inducing abscisic acid (ABA) accumulation in roots and/or leaves. We also measured ABA delivery rate, xylem sap pH and the root/leaf area ratio in order to explain the low gs in plants exposed to Al. Declines in Lpr and gs were proportional to the increase in Al concentration, and all Al treatments similarly decreased Ψleaf, indicating the plant's attempt to reduce water loss through transpiration while accumulating more ABA. Despite Al-induced increases in root ABA, the root-to-shoot delivery of ABA did not enhance, but Al caused root xylem sap alkalization. Despite the stability of root/leaf area ratio across a range of Al concentrations (0, 25 and 50 μM Al), the leaf hydration and stomatal opening was not conserved. Here we provide the first evidence that decreases in Lpr and increases in ABA might explain Al-induced stomatal closure.Programa de Pós-Graduação em Biologia Vegetal Departamento de Biodiversidade Instituto de Biociências Universidade Estadual Paulista UNESP, Av. 24-ALancaster Environment Centre Lancaster University Lancaster University, Library Avenue, LancasterDepartamento de Biologia Aplicada à Agropecuária Faculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista UNESP, Via de Acesso Professor Paulo Donato Castelane Castellane S/N - Vila IndustrialDepartamento de Biodiversidade Instituto de Biociências Universidade Estadual Paulista UNESP, Av. 24-A, 1515Programa de Pós-Graduação em Biologia Vegetal Departamento de Biodiversidade Instituto de Biociências Universidade Estadual Paulista UNESP, Av. 24-ADepartamento de Biologia Aplicada à Agropecuária Faculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista UNESP, Via de Acesso Professor Paulo Donato Castelane Castellane S/N - Vila IndustrialDepartamento de Biodiversidade Instituto de Biociências Universidade Estadual Paulista UNESP, Av. 24-A, 1515Universidade Estadual Paulista (Unesp)Lancaster UniversityGavassi, Marina Alves [UNESP]Dodd, Ian CharlesPuértolas, JaimeSilva, Giselle Schwab [UNESP]Carvalho, Rogério Falleiros [UNESP]Habermann, Gustavo [UNESP]2020-12-12T02:19:13Z2020-12-12T02:19:13Z2020-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.envexpbot.2020.104233Environmental and Experimental Botany, v. 179.0098-8472http://hdl.handle.net/11449/20090710.1016/j.envexpbot.2020.1042332-s2.0-8508947183941253447531004540000-0003-1270-7372Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEnvironmental and Experimental Botanyinfo:eu-repo/semantics/openAccess2021-10-23T15:08:22Zoai:repositorio.unesp.br:11449/200907Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T15:08:22Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation |
title |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation |
spellingShingle |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation Gavassi, Marina Alves [UNESP] Abscisic acid Aluminum Stomatal conductance Water transport Xylem sap pH |
title_short |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation |
title_full |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation |
title_fullStr |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation |
title_full_unstemmed |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation |
title_sort |
Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation |
author |
Gavassi, Marina Alves [UNESP] |
author_facet |
Gavassi, Marina Alves [UNESP] Dodd, Ian Charles Puértolas, Jaime Silva, Giselle Schwab [UNESP] Carvalho, Rogério Falleiros [UNESP] Habermann, Gustavo [UNESP] |
author_role |
author |
author2 |
Dodd, Ian Charles Puértolas, Jaime Silva, Giselle Schwab [UNESP] Carvalho, Rogério Falleiros [UNESP] Habermann, Gustavo [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Lancaster University |
dc.contributor.author.fl_str_mv |
Gavassi, Marina Alves [UNESP] Dodd, Ian Charles Puértolas, Jaime Silva, Giselle Schwab [UNESP] Carvalho, Rogério Falleiros [UNESP] Habermann, Gustavo [UNESP] |
dc.subject.por.fl_str_mv |
Abscisic acid Aluminum Stomatal conductance Water transport Xylem sap pH |
topic |
Abscisic acid Aluminum Stomatal conductance Water transport Xylem sap pH |
description |
Many studies ask how aluminum (Al) reduces the root growth, but as Al is mostly retained in the root system, physiological explanations for the also expected Al-induced decrease in stomatal conductance (gs) are unclear, mainly in well-watered conditions. We exposed tomato plants (Solanum lycopersicum) to 0, 25, 50 and 100 μM Al in nutrient solution to investigate whether Al impairs root hydraulic conductance (Lpr), affecting leaf water potential (Ψleaf) and possibly inducing abscisic acid (ABA) accumulation in roots and/or leaves. We also measured ABA delivery rate, xylem sap pH and the root/leaf area ratio in order to explain the low gs in plants exposed to Al. Declines in Lpr and gs were proportional to the increase in Al concentration, and all Al treatments similarly decreased Ψleaf, indicating the plant's attempt to reduce water loss through transpiration while accumulating more ABA. Despite Al-induced increases in root ABA, the root-to-shoot delivery of ABA did not enhance, but Al caused root xylem sap alkalization. Despite the stability of root/leaf area ratio across a range of Al concentrations (0, 25 and 50 μM Al), the leaf hydration and stomatal opening was not conserved. Here we provide the first evidence that decreases in Lpr and increases in ABA might explain Al-induced stomatal closure. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:19:13Z 2020-12-12T02:19:13Z 2020-11-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.envexpbot.2020.104233 Environmental and Experimental Botany, v. 179. 0098-8472 http://hdl.handle.net/11449/200907 10.1016/j.envexpbot.2020.104233 2-s2.0-85089471839 4125344753100454 0000-0003-1270-7372 |
url |
http://dx.doi.org/10.1016/j.envexpbot.2020.104233 http://hdl.handle.net/11449/200907 |
identifier_str_mv |
Environmental and Experimental Botany, v. 179. 0098-8472 10.1016/j.envexpbot.2020.104233 2-s2.0-85089471839 4125344753100454 0000-0003-1270-7372 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Environmental and Experimental Botany |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1799965621240201216 |