Sap flow responses to warming and fruit load in young olive trees

Autores
Miserere, Andrea; Searles, Peter Stoughton; Manchó, Guadalupe; Maseda, Pablo Horacio; Rousseaux, María Cecilia
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Miserere, Andrea. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.
Fil: Searles, Peter Stoughton. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.
Fil: Manchó, Guadalupe. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.
Fil: Maseda, Pablo Horacio. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.
Fil: Rousseaux, María Cecilia. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.
Global warming will likely lead to temperature increases in many regions of South America where temperatures are already considered to be high for olive production. Thus, experimental studies are needed to assess how water use in olive trees may be affected by global warming. The objectives of this study were to (i) evaluate the response of olive tree sap flow, stomatal conductance, and xylem anatomy to elevated temperature and (ii) determine whether fruit load may affect the temperature responses. A warming experiment using well-irrigated olive trees (cv. Arbequina) in open-top chambers (OTCs) with two temperature levels was performed from fruit set to the end of fruit growth in two seasons. Temperature levels were a near ambient control (T0) and a treatment 4°C above the control (T+). Trees were in the chambers for either one (2015–2016) or two seasons (2014–2015, 2015–2016) and were evaluated only in the second season when all trees were 3 years old. Whole-tree sap flow on leaf area basis, stomatal conductance, and aspects of xylem anatomy were measured. Sap flow was slightly higher in T+ than T0 trees heated for one season early in fruit development (summer) likely due to the elevated temperature and increase in vapor pressure deficit. Later in fruit development (fall), sap flow was substantially higher in the T+ trees heated for one season. Total vessel number per shoot was greater in the T+ than the T0 trees at this time due to more small-diameter vessels in the T+ trees, but this did not appear to explain the greater sap flow. The T+ trees that were heated for two seasons had less fruit load than the T0 trees due to little flowering. In contrast to trees heated for one season, sap flow was less in T+ than controls late in fruit development the second season, which was likely related to lower fruit load. An independent experiment using untreated trees confirmed that sap flow decreases when fruit load is below a threshold value. The results emphasize that multiple, interacting factors should be considered when predicting warming effects on water use in olive orchards.
tbls., grafs.
Fuente
Frontiers in Plant Science
Vol.10
art.1199
http://www.frontiersin.org
Materia
FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
acceso abierto
Repositorio
FAUBA Digital (UBA-FAUBA)
Institución
Universidad de Buenos Aires. Facultad de Agronomía
OAI Identificador
snrd:2019miserereandrea

id FAUBA_02969561562a369036f98c42fbf18613
oai_identifier_str snrd:2019miserereandrea
network_acronym_str FAUBA
repository_id_str 2729
network_name_str FAUBA Digital (UBA-FAUBA)
spelling Sap flow responses to warming and fruit load in young olive treesMiserere, AndreaSearles, Peter StoughtonManchó, GuadalupeMaseda, Pablo HoracioRousseaux, María CeciliaFRUIT LOADGLOBAL WARMINGHEATINGOPEN-TOP CHAMBERSAP FLOWXYLEM ANATOMYFil: Miserere, Andrea. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.Fil: Searles, Peter Stoughton. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.Fil: Manchó, Guadalupe. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.Fil: Maseda, Pablo Horacio. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.Fil: Rousseaux, María Cecilia. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.Global warming will likely lead to temperature increases in many regions of South America where temperatures are already considered to be high for olive production. Thus, experimental studies are needed to assess how water use in olive trees may be affected by global warming. The objectives of this study were to (i) evaluate the response of olive tree sap flow, stomatal conductance, and xylem anatomy to elevated temperature and (ii) determine whether fruit load may affect the temperature responses. A warming experiment using well-irrigated olive trees (cv. Arbequina) in open-top chambers (OTCs) with two temperature levels was performed from fruit set to the end of fruit growth in two seasons. Temperature levels were a near ambient control (T0) and a treatment 4°C above the control (T+). Trees were in the chambers for either one (2015–2016) or two seasons (2014–2015, 2015–2016) and were evaluated only in the second season when all trees were 3 years old. Whole-tree sap flow on leaf area basis, stomatal conductance, and aspects of xylem anatomy were measured. Sap flow was slightly higher in T+ than T0 trees heated for one season early in fruit development (summer) likely due to the elevated temperature and increase in vapor pressure deficit. Later in fruit development (fall), sap flow was substantially higher in the T+ trees heated for one season. Total vessel number per shoot was greater in the T+ than the T0 trees at this time due to more small-diameter vessels in the T+ trees, but this did not appear to explain the greater sap flow. The T+ trees that were heated for two seasons had less fruit load than the T0 trees due to little flowering. In contrast to trees heated for one season, sap flow was less in T+ than controls late in fruit development the second season, which was likely related to lower fruit load. An independent experiment using untreated trees confirmed that sap flow decreases when fruit load is below a threshold value. The results emphasize that multiple, interacting factors should be considered when predicting warming effects on water use in olive orchards.tbls., grafs.2019articleinfo:eu-repo/semantics/articlepublishedVersioninfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfdoi:10.3389/fpls.2019.01199http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2019miserereandreaFrontiers in Plant ScienceVol.10art.1199http://www.frontiersin.orgreponame:FAUBA Digital (UBA-FAUBA)instname:Universidad de Buenos Aires. Facultad de Agronomíaenginfo:eu-repo/semantics/openAccessopenAccesshttp://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section42025-09-29T13:42:05Zsnrd:2019miserereandreainstacron:UBA-FAUBAInstitucionalhttp://ri.agro.uba.ar/Universidad públicaNo correspondehttp://ri.agro.uba.ar/greenstone3/oaiserver?verb=ListSetsmartino@agro.uba.ar;berasa@agro.uba.ar ArgentinaNo correspondeNo correspondeNo correspondeopendoar:27292025-09-29 13:42:06.729FAUBA Digital (UBA-FAUBA) - Universidad de Buenos Aires. Facultad de Agronomíafalse
dc.title.none.fl_str_mv Sap flow responses to warming and fruit load in young olive trees
title Sap flow responses to warming and fruit load in young olive trees
spellingShingle Sap flow responses to warming and fruit load in young olive trees
Miserere, Andrea
FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
title_short Sap flow responses to warming and fruit load in young olive trees
title_full Sap flow responses to warming and fruit load in young olive trees
title_fullStr Sap flow responses to warming and fruit load in young olive trees
title_full_unstemmed Sap flow responses to warming and fruit load in young olive trees
title_sort Sap flow responses to warming and fruit load in young olive trees
dc.creator.none.fl_str_mv Miserere, Andrea
Searles, Peter Stoughton
Manchó, Guadalupe
Maseda, Pablo Horacio
Rousseaux, María Cecilia
author Miserere, Andrea
author_facet Miserere, Andrea
Searles, Peter Stoughton
Manchó, Guadalupe
Maseda, Pablo Horacio
Rousseaux, María Cecilia
author_role author
author2 Searles, Peter Stoughton
Manchó, Guadalupe
Maseda, Pablo Horacio
Rousseaux, María Cecilia
author2_role author
author
author
author
dc.subject.none.fl_str_mv FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
topic FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
dc.description.none.fl_txt_mv Fil: Miserere, Andrea. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.
Fil: Searles, Peter Stoughton. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.
Fil: Manchó, Guadalupe. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.
Fil: Maseda, Pablo Horacio. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.
Fil: Rousseaux, María Cecilia. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.
Global warming will likely lead to temperature increases in many regions of South America where temperatures are already considered to be high for olive production. Thus, experimental studies are needed to assess how water use in olive trees may be affected by global warming. The objectives of this study were to (i) evaluate the response of olive tree sap flow, stomatal conductance, and xylem anatomy to elevated temperature and (ii) determine whether fruit load may affect the temperature responses. A warming experiment using well-irrigated olive trees (cv. Arbequina) in open-top chambers (OTCs) with two temperature levels was performed from fruit set to the end of fruit growth in two seasons. Temperature levels were a near ambient control (T0) and a treatment 4°C above the control (T+). Trees were in the chambers for either one (2015–2016) or two seasons (2014–2015, 2015–2016) and were evaluated only in the second season when all trees were 3 years old. Whole-tree sap flow on leaf area basis, stomatal conductance, and aspects of xylem anatomy were measured. Sap flow was slightly higher in T+ than T0 trees heated for one season early in fruit development (summer) likely due to the elevated temperature and increase in vapor pressure deficit. Later in fruit development (fall), sap flow was substantially higher in the T+ trees heated for one season. Total vessel number per shoot was greater in the T+ than the T0 trees at this time due to more small-diameter vessels in the T+ trees, but this did not appear to explain the greater sap flow. The T+ trees that were heated for two seasons had less fruit load than the T0 trees due to little flowering. In contrast to trees heated for one season, sap flow was less in T+ than controls late in fruit development the second season, which was likely related to lower fruit load. An independent experiment using untreated trees confirmed that sap flow decreases when fruit load is below a threshold value. The results emphasize that multiple, interacting factors should be considered when predicting warming effects on water use in olive orchards.
tbls., grafs.
description Fil: Miserere, Andrea. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR-SEGEMAR-UNCa-CONICET). La Rioja, Argentina.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv article
info:eu-repo/semantics/article
publishedVersion
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 doi:10.3389/fpls.2019.01199
http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2019miserereandrea
identifier_str_mv doi:10.3389/fpls.2019.01199
url http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2019miserereandrea
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
openAccess
http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4
eu_rights_str_mv openAccess
rights_invalid_str_mv openAccess
http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Frontiers in Plant Science
Vol.10
art.1199
http://www.frontiersin.org
reponame:FAUBA Digital (UBA-FAUBA)
instname:Universidad de Buenos Aires. Facultad de Agronomía
reponame_str FAUBA Digital (UBA-FAUBA)
collection FAUBA Digital (UBA-FAUBA)
instname_str Universidad de Buenos Aires. Facultad de Agronomía
repository.name.fl_str_mv FAUBA Digital (UBA-FAUBA) - Universidad de Buenos Aires. Facultad de Agronomía
repository.mail.fl_str_mv martino@agro.uba.ar;berasa@agro.uba.ar
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score 13.070432