The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots

Autores
Bucci, Sandra Janet; Scholz, Fabian Gustavo; Peschiutta, María Laura; Arias, Nadia Soledad; Meinzer, Frederick; Goldstein, Guillermo Hernan
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Hydraulic architecture was studied in shrub species differing in rooting depth in a cold desert in Southern Argentina. All species exhibited strong hydraulic segmentation between leaves, stems and roots with leaves being the most vulnerable part of the hydraulic pathway. Two types of safety margins describing the degree of conservation of the hydraulic integrity were used: the difference between minimum stem or leaf water potential (⍦) and the ⍦ at which stem or leaf hydraulic function was reduced by 50% ⍦ - ⍦50), and the difference between leaf and stem ⍦50. Leaf ⍦50 -⍦ stem ⍦50 increased with decreasing rooting depth. Large diurnal decreases in rootspecific hydraulic conductivity suggested high root vulnerability to embolism across all species. Although stem ⍦50 became more negative with decreasing species-specific Ysoil and minimum stem⍦, leaf ⍦50 was independent of ⍦ and minimum leaf ⍦. Species with embolism-resistant stems also had higher maximum stem hydraulic conductivity. Safety margins for stems were >2.1 MPa, whereas those for leaves were negative or only slightly positive. Leaves acted as safety valves to protect the integrity of the upstream hydraulic pathway, whereas embolism in lateral roots may help to decouple portions of the plant from the impact of drier soil layers.
Fil: Bucci, Sandra Janet. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Scholz, Fabian Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Peschiutta, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Arias, Nadia Soledad. Universidad Nacional de la Patagonia "san Juan Bosco". Facultad de Ingenieria - Sede Comodoro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Meinzer, Frederick. United States Department of Agriculture; Estados Unidos
Fil: Goldstein, Guillermo Hernan. University Of Miami; Estados Unidos. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Ecología Funcional; Argentina
Materia
Hydraulic Conductivity
Hydraulic Segmentation
Leaf Water Potential
Safety Margin
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/7575
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/7575
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and rootsBucci, Sandra JanetScholz, Fabian GustavoPeschiutta, María LauraArias, Nadia SoledadMeinzer, FrederickGoldstein, Guillermo HernanHydraulic ConductivityHydraulic SegmentationLeaf Water PotentialSafety Marginhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Hydraulic architecture was studied in shrub species differing in rooting depth in a cold desert in Southern Argentina. All species exhibited strong hydraulic segmentation between leaves, stems and roots with leaves being the most vulnerable part of the hydraulic pathway. Two types of safety margins describing the degree of conservation of the hydraulic integrity were used: the difference between minimum stem or leaf water potential (⍦) and the ⍦ at which stem or leaf hydraulic function was reduced by 50% ⍦ - ⍦50), and the difference between leaf and stem ⍦50. Leaf ⍦50 -⍦ stem ⍦50 increased with decreasing rooting depth. Large diurnal decreases in rootspecific hydraulic conductivity suggested high root vulnerability to embolism across all species. Although stem ⍦50 became more negative with decreasing species-specific Ysoil and minimum stem⍦, leaf ⍦50 was independent of ⍦ and minimum leaf ⍦. Species with embolism-resistant stems also had higher maximum stem hydraulic conductivity. Safety margins for stems were >2.1 MPa, whereas those for leaves were negative or only slightly positive. Leaves acted as safety valves to protect the integrity of the upstream hydraulic pathway, whereas embolism in lateral roots may help to decouple portions of the plant from the impact of drier soil layers.Fil: Bucci, Sandra Janet. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Scholz, Fabian Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Peschiutta, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Arias, Nadia Soledad. Universidad Nacional de la Patagonia "san Juan Bosco". Facultad de Ingenieria - Sede Comodoro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Meinzer, Frederick. United States Department of Agriculture; Estados UnidosFil: Goldstein, Guillermo Hernan. University Of Miami; Estados Unidos. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Ecología Funcional; ArgentinaWiley2013-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/7575Bucci, Sandra Janet; Scholz, Fabian Gustavo; Peschiutta, María Laura; Arias, Nadia Soledad; Meinzer, Frederick; et al.; The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots; Wiley; Plant, Cell And Environment; 36; 12; 3-2013; 2163-21740140-7791enginfo:eu-repo/semantics/altIdentifier/doi/10.1111/pce.12126info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/pce.12126/fullinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:42:04Zoai:ri.conicet.gov.ar:11336/7575instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:42:04.552CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
title The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
spellingShingle The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
Bucci, Sandra Janet
Hydraulic Conductivity
Hydraulic Segmentation
Leaf Water Potential
Safety Margin
title_short The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
title_full The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
title_fullStr The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
title_full_unstemmed The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
title_sort The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots
dc.creator.none.fl_str_mv Bucci, Sandra Janet
Scholz, Fabian Gustavo
Peschiutta, María Laura
Arias, Nadia Soledad
Meinzer, Frederick
Goldstein, Guillermo Hernan
author Bucci, Sandra Janet
author_facet Bucci, Sandra Janet
Scholz, Fabian Gustavo
Peschiutta, María Laura
Arias, Nadia Soledad
Meinzer, Frederick
Goldstein, Guillermo Hernan
author_role author
author2 Scholz, Fabian Gustavo
Peschiutta, María Laura
Arias, Nadia Soledad
Meinzer, Frederick
Goldstein, Guillermo Hernan
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Hydraulic Conductivity
Hydraulic Segmentation
Leaf Water Potential
Safety Margin
topic Hydraulic Conductivity
Hydraulic Segmentation
Leaf Water Potential
Safety Margin
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Hydraulic architecture was studied in shrub species differing in rooting depth in a cold desert in Southern Argentina. All species exhibited strong hydraulic segmentation between leaves, stems and roots with leaves being the most vulnerable part of the hydraulic pathway. Two types of safety margins describing the degree of conservation of the hydraulic integrity were used: the difference between minimum stem or leaf water potential (⍦) and the ⍦ at which stem or leaf hydraulic function was reduced by 50% ⍦ - ⍦50), and the difference between leaf and stem ⍦50. Leaf ⍦50 -⍦ stem ⍦50 increased with decreasing rooting depth. Large diurnal decreases in rootspecific hydraulic conductivity suggested high root vulnerability to embolism across all species. Although stem ⍦50 became more negative with decreasing species-specific Ysoil and minimum stem⍦, leaf ⍦50 was independent of ⍦ and minimum leaf ⍦. Species with embolism-resistant stems also had higher maximum stem hydraulic conductivity. Safety margins for stems were >2.1 MPa, whereas those for leaves were negative or only slightly positive. Leaves acted as safety valves to protect the integrity of the upstream hydraulic pathway, whereas embolism in lateral roots may help to decouple portions of the plant from the impact of drier soil layers.
Fil: Bucci, Sandra Janet. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Scholz, Fabian Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Peschiutta, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Arias, Nadia Soledad. Universidad Nacional de la Patagonia "san Juan Bosco". Facultad de Ingenieria - Sede Comodoro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Meinzer, Frederick. United States Department of Agriculture; Estados Unidos
Fil: Goldstein, Guillermo Hernan. University Of Miami; Estados Unidos. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Ecología Funcional; Argentina
description Hydraulic architecture was studied in shrub species differing in rooting depth in a cold desert in Southern Argentina. All species exhibited strong hydraulic segmentation between leaves, stems and roots with leaves being the most vulnerable part of the hydraulic pathway. Two types of safety margins describing the degree of conservation of the hydraulic integrity were used: the difference between minimum stem or leaf water potential (⍦) and the ⍦ at which stem or leaf hydraulic function was reduced by 50% ⍦ - ⍦50), and the difference between leaf and stem ⍦50. Leaf ⍦50 -⍦ stem ⍦50 increased with decreasing rooting depth. Large diurnal decreases in rootspecific hydraulic conductivity suggested high root vulnerability to embolism across all species. Although stem ⍦50 became more negative with decreasing species-specific Ysoil and minimum stem⍦, leaf ⍦50 was independent of ⍦ and minimum leaf ⍦. Species with embolism-resistant stems also had higher maximum stem hydraulic conductivity. Safety margins for stems were >2.1 MPa, whereas those for leaves were negative or only slightly positive. Leaves acted as safety valves to protect the integrity of the upstream hydraulic pathway, whereas embolism in lateral roots may help to decouple portions of the plant from the impact of drier soil layers.
publishDate 2013
dc.date.none.fl_str_mv 2013-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/7575
Bucci, Sandra Janet; Scholz, Fabian Gustavo; Peschiutta, María Laura; Arias, Nadia Soledad; Meinzer, Frederick; et al.; The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots; Wiley; Plant, Cell And Environment; 36; 12; 3-2013; 2163-2174
0140-7791
url http://hdl.handle.net/11336/7575
identifier_str_mv Bucci, Sandra Janet; Scholz, Fabian Gustavo; Peschiutta, María Laura; Arias, Nadia Soledad; Meinzer, Frederick; et al.; The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought- induced embolism by leaves and roots; Wiley; Plant, Cell And Environment; 36; 12; 3-2013; 2163-2174
0140-7791
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/pce.12126
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/pce.12126/full
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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