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

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

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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.

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Main Authors: Miserere, Andrea, Searles, Peter Stoughton, Manchó, Guadalupe, Maseda, Pablo Horacio, Rousseaux, María Cecilia
Format: article biblioteca
Language:eng
Subjects:FRUIT LOAD, GLOBAL WARMING, HEATING, OPEN-TOP CHAMBER, SAP FLOW, XYLEM ANATOMY,
Online Access:http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2019miserereandrea
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spelling snrd:2019miserereandrea2021-10-15T16:56:07Z Miserere, Andrea Searles, Peter Stoughton Manchó, Guadalupe Maseda, Pablo Horacio Rousseaux, María Cecilia 2019 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. application/pdf 10.3389/fpls.2019.01199 http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2019miserereandrea eng info:eu-repo/semantics/openAccess openAccess http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4 Frontiers in Plant Science Vol.10 art.1199,13p. http://www.frontiersin.org FRUIT LOAD GLOBAL WARMING HEATING OPEN-TOP CHAMBER SAP FLOW XYLEM ANATOMY Sap flow responses to warming and fruit load in young olive trees article info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion publishedVersion
institution UBA
collection DSpace
country Argentina
countrycode AR
component Bibliográfico
access En linea
databasecode dig-ubafa
tag biblioteca
region America del Sur
libraryname Biblioteca Facultad de Agronomía
language eng
topic FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
spellingShingle FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
Miserere, Andrea
Searles, Peter Stoughton
Manchó, Guadalupe
Maseda, Pablo Horacio
Rousseaux, María Cecilia
Sap flow responses to warming and fruit load in young olive trees
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.
format article
topic_facet FRUIT LOAD
GLOBAL WARMING
HEATING
OPEN-TOP CHAMBER
SAP FLOW
XYLEM ANATOMY
author Miserere, Andrea
Searles, Peter Stoughton
Manchó, Guadalupe
Maseda, Pablo Horacio
Rousseaux, María Cecilia
author_facet Miserere, Andrea
Searles, Peter Stoughton
Manchó, Guadalupe
Maseda, Pablo Horacio
Rousseaux, María Cecilia
author_sort Miserere, Andrea
title Sap flow responses to warming and fruit load in young olive trees
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
url http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2019miserereandrea
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AT searlespeterstoughton sapflowresponsestowarmingandfruitloadinyoungolivetrees
AT manchoguadalupe sapflowresponsestowarmingandfruitloadinyoungolivetrees
AT masedapablohoracio sapflowresponsestowarmingandfruitloadinyoungolivetrees
AT rousseauxmariacecilia sapflowresponsestowarmingandfruitloadinyoungolivetrees
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