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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/7575
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:12:08Zoai: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:34982025-09-29 10:12:09.011CONICET 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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13.070432 |