Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.scienta.2016.04.021 http://hdl.handle.net/11449/176919 |
Resumo: | Aluminum (Al) is toxic to most plants. Although inhibition of root elongation can occur even under 10 μM Al, above 1000 μM damage to photochemical performances has been reported, reducing the CO2 assimilation rate (A). However, Al is retained in the roots of most plants, including Citrus limonia ('Rangpur' lime) with no direct explanation for the low A. In this study, 'Rangpur' lime plants were cultivated hydroponically in a nutrient solution with 1480 μM Al, and we expected to determine the time range within which Al-induced decrease in A starts. To our surprise, low stomatal conductance (gs) rather than low photochemical performances was evident 45 days after exposing the roots to Al. Aluminum was mostly retained in the roots and histochemically observed in the stele, suggesting reduction in water uptake/transport in the xylem that became fibrous. We also found a 35% reduction in the midday leaf water potential in plants exposed to Al, indicating association between the fibrous xylem vessels and low gs, which could explain the Al-induced decrease in A in 'Rangpur' lime plants. |
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Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performancesAluminum allocationCitrus limoniaHistochemical characteristicsLeaf gas exchange parametersLong-distance Al effectsAluminum (Al) is toxic to most plants. Although inhibition of root elongation can occur even under 10 μM Al, above 1000 μM damage to photochemical performances has been reported, reducing the CO2 assimilation rate (A). However, Al is retained in the roots of most plants, including Citrus limonia ('Rangpur' lime) with no direct explanation for the low A. In this study, 'Rangpur' lime plants were cultivated hydroponically in a nutrient solution with 1480 μM Al, and we expected to determine the time range within which Al-induced decrease in A starts. To our surprise, low stomatal conductance (gs) rather than low photochemical performances was evident 45 days after exposing the roots to Al. Aluminum was mostly retained in the roots and histochemically observed in the stele, suggesting reduction in water uptake/transport in the xylem that became fibrous. We also found a 35% reduction in the midday leaf water potential in plants exposed to Al, indicating association between the fibrous xylem vessels and low gs, which could explain the Al-induced decrease in A in 'Rangpur' lime plants.Programa de Pos-Graduacao em Ciencias Biológicas (Biologia Vegetal) Univ Estadual Paulista Unesp Instituto de Biociências Departamento de Botânica, Av. 24-A, 1515Centro de Ciências Agrárias Universidade Federal de São Carlos UFSCar, Rodovia Anhanguera, km 174Escola Superior de Agricultura Luiz de Queiroz-Universidade de São Paulo ESALQ-USP Nucleo de Apoio a Pesquisa em Microscopia Eletronica Aplicada a Pesquisa Agropecuaria (NAP/MEPA) Departamento de Fitopatologia e Nematologia, Av. Pádua Dias, 11Univ Estadual Paulista Unesp Instituto de Biociências Departamento de Botânica, Av. 24-A, 1515Programa de Pos-Graduacao em Ciencias Biológicas (Biologia Vegetal) Univ Estadual Paulista Unesp Instituto de Biociências Departamento de Botânica, Av. 24-A, 1515Univ Estadual Paulista Unesp Instituto de Biociências Departamento de Botânica, Av. 24-A, 1515Universidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Universidade de São Paulo (USP)Banhos, Otavia F.A.A. [UNESP]de O. Carvalho, Brenda M.da Veiga, Eduardo B. [UNESP]Bressan, Anna C.G. [UNESP]Tanaka, Francisco A.O.Habermann, Gustavo [UNESP]2018-12-11T17:23:06Z2018-12-11T17:23:06Z2016-06-23info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article133-140application/pdfhttp://dx.doi.org/10.1016/j.scienta.2016.04.021Scientia Horticulturae, v. 205, p. 133-140.0304-4238http://hdl.handle.net/11449/17691910.1016/j.scienta.2016.04.0212-s2.0-849651696282-s2.0-84965169628.pdf2-s2.0-84965169628.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengScientia Horticulturae0,799info:eu-repo/semantics/openAccess2024-04-11T19:33:50Zoai:repositorio.unesp.br:11449/176919Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-05-23T11:08:17.225584Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances |
title |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances |
spellingShingle |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances Banhos, Otavia F.A.A. [UNESP] Aluminum allocation Citrus limonia Histochemical characteristics Leaf gas exchange parameters Long-distance Al effects |
title_short |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances |
title_full |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances |
title_fullStr |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances |
title_full_unstemmed |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances |
title_sort |
Aluminum-induced decrease in CO2 assimilation in 'Rangpur' lime is associated with low stomatal conductance rather than low photochemical performances |
author |
Banhos, Otavia F.A.A. [UNESP] |
author_facet |
Banhos, Otavia F.A.A. [UNESP] de O. Carvalho, Brenda M. da Veiga, Eduardo B. [UNESP] Bressan, Anna C.G. [UNESP] Tanaka, Francisco A.O. Habermann, Gustavo [UNESP] |
author_role |
author |
author2 |
de O. Carvalho, Brenda M. da Veiga, Eduardo B. [UNESP] Bressan, Anna C.G. [UNESP] Tanaka, Francisco A.O. Habermann, Gustavo [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de São Carlos (UFSCar) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Banhos, Otavia F.A.A. [UNESP] de O. Carvalho, Brenda M. da Veiga, Eduardo B. [UNESP] Bressan, Anna C.G. [UNESP] Tanaka, Francisco A.O. Habermann, Gustavo [UNESP] |
dc.subject.por.fl_str_mv |
Aluminum allocation Citrus limonia Histochemical characteristics Leaf gas exchange parameters Long-distance Al effects |
topic |
Aluminum allocation Citrus limonia Histochemical characteristics Leaf gas exchange parameters Long-distance Al effects |
description |
Aluminum (Al) is toxic to most plants. Although inhibition of root elongation can occur even under 10 μM Al, above 1000 μM damage to photochemical performances has been reported, reducing the CO2 assimilation rate (A). However, Al is retained in the roots of most plants, including Citrus limonia ('Rangpur' lime) with no direct explanation for the low A. In this study, 'Rangpur' lime plants were cultivated hydroponically in a nutrient solution with 1480 μM Al, and we expected to determine the time range within which Al-induced decrease in A starts. To our surprise, low stomatal conductance (gs) rather than low photochemical performances was evident 45 days after exposing the roots to Al. Aluminum was mostly retained in the roots and histochemically observed in the stele, suggesting reduction in water uptake/transport in the xylem that became fibrous. We also found a 35% reduction in the midday leaf water potential in plants exposed to Al, indicating association between the fibrous xylem vessels and low gs, which could explain the Al-induced decrease in A in 'Rangpur' lime plants. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-06-23 2018-12-11T17:23:06Z 2018-12-11T17:23:06Z |
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.scienta.2016.04.021 Scientia Horticulturae, v. 205, p. 133-140. 0304-4238 http://hdl.handle.net/11449/176919 10.1016/j.scienta.2016.04.021 2-s2.0-84965169628 2-s2.0-84965169628.pdf 2-s2.0-84965169628.pdf |
url |
http://dx.doi.org/10.1016/j.scienta.2016.04.021 http://hdl.handle.net/11449/176919 |
identifier_str_mv |
Scientia Horticulturae, v. 205, p. 133-140. 0304-4238 10.1016/j.scienta.2016.04.021 2-s2.0-84965169628 2-s2.0-84965169628.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Scientia Horticulturae 0,799 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
133-140 application/pdf |
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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1803045775310061568 |