Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America

Autores
Gyenge, Javier; Fernandez, Marí­a Elena; Varela, Santiago Agustin
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
Trees drought responses could be developed in the short- or in the long-term, aiming at sustaining carbon fixation and water use efficiency (WUE). The objective of this study was to examine short- and long-term adjustments occurring in different size Pinus ponderosa Dougl. ex P. & C. Laws trees in response to seasonal drought when they are growing under different competition level. The following variables were studied: branch and stem hydraulic conductivity, canopy and stomatal conductance (gc, gs), transpiration (E), photosynthesis (Amax), wood δ13C (as a proxy of intrinsic WUE), leaf to sapwood area ratio (AL:As) and growth in the biggest (B) and the smallest (S) trees of high (H) and low (L) density stands. AL:As was positively correlated with tree size and negatively correlated with competition level, increasing leaf hydraulic conductance in H trees. Accordingly, higher gc and E per unit AL were found in H than in L trees when soil water availability was high, but decreased abruptly during dry periods. BL trees maintained stable gc and E values even during the summer drought. The functional adjustments observed in H trees allow them to maintain their hydraulic integrity (no apparent ks losses), but their stem and leaf growth were severely affected by drought events. iWUE was similar between all tree groups in a wet season, whereas it significantly decreased in SH trees in a dry season suggesting that when radiation and water are co-limiting gas exchange, functional adjustments not only affect absolute growth, but also WUE.
Fil: Gyenge, Javier Enrique. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fernandez, Marí­a Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Varela, Santiago Agustin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina
Fuente
Trees : structure and function 26 (6) : 1905–1917 (December 2012)
Materia
Pinus Ponderosa
Arboles Forestales
Sequía
Forest Trees
Drought
Hydraulic Conductivity
Water Use Efficiency
Intraspecific Competition
Conductividad Hidráulica
Eficacia en el Uso del Agua
Competencia Intraespecífica
Región Patagónica
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/1543
Acceder
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oai_identifier_str oai:localhost:20.500.12123/1543
network_acronym_str INTADig
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network_name_str INTA Digital (INTA)
spelling Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South AmericaGyenge, JavierFernandez, Marí­a ElenaVarela, Santiago AgustinPinus PonderosaArboles ForestalesSequíaForest TreesDroughtHydraulic ConductivityWater Use EfficiencyIntraspecific CompetitionConductividad HidráulicaEficacia en el Uso del AguaCompetencia IntraespecíficaRegión PatagónicaTrees drought responses could be developed in the short- or in the long-term, aiming at sustaining carbon fixation and water use efficiency (WUE). The objective of this study was to examine short- and long-term adjustments occurring in different size Pinus ponderosa Dougl. ex P. & C. Laws trees in response to seasonal drought when they are growing under different competition level. The following variables were studied: branch and stem hydraulic conductivity, canopy and stomatal conductance (gc, gs), transpiration (E), photosynthesis (Amax), wood δ13C (as a proxy of intrinsic WUE), leaf to sapwood area ratio (AL:As) and growth in the biggest (B) and the smallest (S) trees of high (H) and low (L) density stands. AL:As was positively correlated with tree size and negatively correlated with competition level, increasing leaf hydraulic conductance in H trees. Accordingly, higher gc and E per unit AL were found in H than in L trees when soil water availability was high, but decreased abruptly during dry periods. BL trees maintained stable gc and E values even during the summer drought. The functional adjustments observed in H trees allow them to maintain their hydraulic integrity (no apparent ks losses), but their stem and leaf growth were severely affected by drought events. iWUE was similar between all tree groups in a wet season, whereas it significantly decreased in SH trees in a dry season suggesting that when radiation and water are co-limiting gas exchange, functional adjustments not only affect absolute growth, but also WUE.Fil: Gyenge, Javier Enrique. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fernandez, Marí­a Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Varela, Santiago Agustin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina2017-10-20T12:02:05Z2017-10-20T12:02:05Z2012-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/1543https://link.springer.com/article/10.1007/s00468-012-0759-70931-1890 (Print)1432-2285 (Online)https://doi.org/10.1007/s00468-012-0759-7Trees : structure and function 26 (6) : 1905–1917 (December 2012)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-09-29T13:44:12Zoai:localhost:20.500.12123/1543instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:44:13.216INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
title Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
spellingShingle Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
Gyenge, Javier
Pinus Ponderosa
Arboles Forestales
Sequía
Forest Trees
Drought
Hydraulic Conductivity
Water Use Efficiency
Intraspecific Competition
Conductividad Hidráulica
Eficacia en el Uso del Agua
Competencia Intraespecífica
Región Patagónica
title_short Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
title_full Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
title_fullStr Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
title_full_unstemmed Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
title_sort Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
dc.creator.none.fl_str_mv Gyenge, Javier
Fernandez, Marí­a Elena
Varela, Santiago Agustin
author Gyenge, Javier
author_facet Gyenge, Javier
Fernandez, Marí­a Elena
Varela, Santiago Agustin
author_role author
author2 Fernandez, Marí­a Elena
Varela, Santiago Agustin
author2_role author
author
dc.subject.none.fl_str_mv Pinus Ponderosa
Arboles Forestales
Sequía
Forest Trees
Drought
Hydraulic Conductivity
Water Use Efficiency
Intraspecific Competition
Conductividad Hidráulica
Eficacia en el Uso del Agua
Competencia Intraespecífica
Región Patagónica
topic Pinus Ponderosa
Arboles Forestales
Sequía
Forest Trees
Drought
Hydraulic Conductivity
Water Use Efficiency
Intraspecific Competition
Conductividad Hidráulica
Eficacia en el Uso del Agua
Competencia Intraespecífica
Región Patagónica
dc.description.none.fl_txt_mv Trees drought responses could be developed in the short- or in the long-term, aiming at sustaining carbon fixation and water use efficiency (WUE). The objective of this study was to examine short- and long-term adjustments occurring in different size Pinus ponderosa Dougl. ex P. & C. Laws trees in response to seasonal drought when they are growing under different competition level. The following variables were studied: branch and stem hydraulic conductivity, canopy and stomatal conductance (gc, gs), transpiration (E), photosynthesis (Amax), wood δ13C (as a proxy of intrinsic WUE), leaf to sapwood area ratio (AL:As) and growth in the biggest (B) and the smallest (S) trees of high (H) and low (L) density stands. AL:As was positively correlated with tree size and negatively correlated with competition level, increasing leaf hydraulic conductance in H trees. Accordingly, higher gc and E per unit AL were found in H than in L trees when soil water availability was high, but decreased abruptly during dry periods. BL trees maintained stable gc and E values even during the summer drought. The functional adjustments observed in H trees allow them to maintain their hydraulic integrity (no apparent ks losses), but their stem and leaf growth were severely affected by drought events. iWUE was similar between all tree groups in a wet season, whereas it significantly decreased in SH trees in a dry season suggesting that when radiation and water are co-limiting gas exchange, functional adjustments not only affect absolute growth, but also WUE.
Fil: Gyenge, Javier Enrique. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fernandez, Marí­a Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Varela, Santiago Agustin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina
description Trees drought responses could be developed in the short- or in the long-term, aiming at sustaining carbon fixation and water use efficiency (WUE). The objective of this study was to examine short- and long-term adjustments occurring in different size Pinus ponderosa Dougl. ex P. & C. Laws trees in response to seasonal drought when they are growing under different competition level. The following variables were studied: branch and stem hydraulic conductivity, canopy and stomatal conductance (gc, gs), transpiration (E), photosynthesis (Amax), wood δ13C (as a proxy of intrinsic WUE), leaf to sapwood area ratio (AL:As) and growth in the biggest (B) and the smallest (S) trees of high (H) and low (L) density stands. AL:As was positively correlated with tree size and negatively correlated with competition level, increasing leaf hydraulic conductance in H trees. Accordingly, higher gc and E per unit AL were found in H than in L trees when soil water availability was high, but decreased abruptly during dry periods. BL trees maintained stable gc and E values even during the summer drought. The functional adjustments observed in H trees allow them to maintain their hydraulic integrity (no apparent ks losses), but their stem and leaf growth were severely affected by drought events. iWUE was similar between all tree groups in a wet season, whereas it significantly decreased in SH trees in a dry season suggesting that when radiation and water are co-limiting gas exchange, functional adjustments not only affect absolute growth, but also WUE.
publishDate 2012
dc.date.none.fl_str_mv 2012-12
2017-10-20T12:02:05Z
2017-10-20T12:02:05Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/1543
https://link.springer.com/article/10.1007/s00468-012-0759-7
0931-1890 (Print)
1432-2285 (Online)
https://doi.org/10.1007/s00468-012-0759-7
url http://hdl.handle.net/20.500.12123/1543
https://link.springer.com/article/10.1007/s00468-012-0759-7
https://doi.org/10.1007/s00468-012-0759-7
identifier_str_mv 0931-1890 (Print)
1432-2285 (Online)
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Trees : structure and function 26 (6) : 1905–1917 (December 2012)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.559606

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