Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit

8 páginas, 5 figuras, 1 tabla, 19 referencias.-- IX International Workshop on Sap Flow, celebrado del 4-7 de junio 2013, en Gante, Bélgica.

Detalhes bibliográficos
Autores: Hernández Santana, V., Alvarado-Barrientos, M.S., Rodríguez-Domínguez, Celia M., Pérez Martín, Alfonso, Díaz-Espejo, Antonio
Tipo de documento: artigo
Data de publicação:2013
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/88178
Acesso em linha:http://hdl.handle.net/10261/88178
Access Level:Acceso aberto
Palavra-chave:Sap flux density
Radial patterns
Beta function
Olive trees
Stomatal control
Transpiration
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spelling Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficitHernández Santana, V.Alvarado-Barrientos, M.S.Rodríguez-Domínguez, Celia M.Pérez Martín, AlfonsoDíaz-Espejo, AntonioSap flux densityRadial patternsBeta functionOlive treesStomatal controlTranspiration8 páginas, 5 figuras, 1 tabla, 19 referencias.-- IX International Workshop on Sap Flow, celebrado del 4-7 de junio 2013, en Gante, Bélgica.Knowledge of temporal variations in radial profiles of sap flux density (Js) and its relation to canopy water vapour exchange would help to improve our understanding of plant water relations. In this study we aimed to test if there is a consistent radial profile of Js in olive trees under optimal soil water availability and severe water stress conditions. Furthermore, if the radial profile of Js is not consistent through time we aimed to assess whether this radial variability can be explained through differential water exchange response to evaporative demand (D) of sun-exposed, new foliage and shade, old foliage. We measured sap flux density in the trunk of 6-year-old olive trees under two different irrigation treatments: a full irrigation treatment and a treatment replacing 30% of the of irrigation needs. We related the hourly radial profiles characterized with the Beta probability distribution function with independent water vapour exchange measurements at different exposures in the tree canopy (sun-exposed, young foliage and shade, old foliage). Results showed that under well irrigated conditions the shape of the radial profile of Js hardly varied, but under water deficit situations most of the sap appears to be conducted deeper into the sapwood and Js is also more variable throughout the sapwood. Accordingly, results demonstrated that in shade, old foliage water vapour exchange varied less than in sun-exposed new foliage. As a result, in days under severe water deficit, the contribution of shade old foliage to the whole tree transpiration was greater. Radial profile changes and canopy measurements were found to respond in a similar way to D. During conditions of low D and soil water deficit it was observed a greater contribution of the inner xylem to total stem flow and shade, old leaves to canopy gas exchange.Peer reviewedInternational Society for Horticultural Science201320132013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/88178reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/881782026-05-22T06:33:51Z
dc.title.none.fl_str_mv Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
title Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
spellingShingle Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
Hernández Santana, V.
Sap flux density
Radial patterns
Beta function
Olive trees
Stomatal control
Transpiration
title_short Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
title_full Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
title_fullStr Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
title_full_unstemmed Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
title_sort Linking changes in radial profiles of sap flux density with the response of water vapour exchange to water deficit
dc.creator.none.fl_str_mv Hernández Santana, V.
Alvarado-Barrientos, M.S.
Rodríguez-Domínguez, Celia M.
Pérez Martín, Alfonso
Díaz-Espejo, Antonio
author Hernández Santana, V.
author_facet Hernández Santana, V.
Alvarado-Barrientos, M.S.
Rodríguez-Domínguez, Celia M.
Pérez Martín, Alfonso
Díaz-Espejo, Antonio
author_role author
author2 Alvarado-Barrientos, M.S.
Rodríguez-Domínguez, Celia M.
Pérez Martín, Alfonso
Díaz-Espejo, Antonio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Sap flux density
Radial patterns
Beta function
Olive trees
Stomatal control
Transpiration
topic Sap flux density
Radial patterns
Beta function
Olive trees
Stomatal control
Transpiration
description 8 páginas, 5 figuras, 1 tabla, 19 referencias.-- IX International Workshop on Sap Flow, celebrado del 4-7 de junio 2013, en Gante, Bélgica.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/88178
url http://hdl.handle.net/10261/88178
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv International Society for Horticultural Science
publisher.none.fl_str_mv International Society for Horticultural Science
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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