Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry Trees

As a necessary step towards understanding soil water extraction and plant water relationships, the components of hydraulic conductance (K) of mature sweet cherry (Prunus avium L.) trees were evaluated in situ based on a Ohm’s law analog method. In June 2004, K was determined for 10-yr-old...

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Autores principales: Oyarzún,Ricardo, Stöckle,Claudio, Whiting,Matthew
Lenguaje:English
Publicado: Instituto de Investigaciones Agropecuarias, INIA 2010
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100006
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spelling oai:scielo:S0718-583920100001000062018-10-01Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry TreesOyarzún,RicardoStöckle,ClaudioWhiting,Matthew plant water relations transpiration water potential whole-canopy gas exchange As a necessary step towards understanding soil water extraction and plant water relationships, the components of hydraulic conductance (K) of mature sweet cherry (Prunus avium L.) trees were evaluated in situ based on a Ohm’s law analog method. In June 2004, K was determined for 10-yr-old ’Bing’/’Gisela® 5’ trees, from simultaneous measurements of whole canopy gas exchange and leaf (sunlit and shaded) and stem water potentials (Ψ). Leaf water potential of sunlit leaves was lower than shaded leaves, reaching minimum values of ca. -2.3 MPa around 14:00 h (solar time). Average total hydraulic conductance was 60 ± 6 mmol s-1 MPa-1, presenting a slight decreasing trend as the season progressed. The analysis of tree K components showed that it was higher on the stem-leaf pathway (150 ± 50 mmol s-1 MPa-1), compared to the root-stem component (100 ± 20 mmol s-1 MPa-1), which is in agreement with literature reports for other fruit trees. A weak hysteresis pattern in the daily relationship between whole-canopy transpiration (weighted sunlit and shaded leaves) vs. Ψ was observed, suggesting that water storage within the tree is not a significant component of sweet cherry water balance.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.70 n.1 20102010-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100006en10.4067/S0718-58392010000100006
institution Scielo Chile
collection Scielo Chile
language English
topic plant water relations
transpiration
water potential
whole-canopy gas exchange
spellingShingle plant water relations
transpiration
water potential
whole-canopy gas exchange
Oyarzún,Ricardo
Stöckle,Claudio
Whiting,Matthew
Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry Trees
description As a necessary step towards understanding soil water extraction and plant water relationships, the components of hydraulic conductance (K) of mature sweet cherry (Prunus avium L.) trees were evaluated in situ based on a Ohm’s law analog method. In June 2004, K was determined for 10-yr-old ’Bing’/’Gisela® 5’ trees, from simultaneous measurements of whole canopy gas exchange and leaf (sunlit and shaded) and stem water potentials (Ψ). Leaf water potential of sunlit leaves was lower than shaded leaves, reaching minimum values of ca. -2.3 MPa around 14:00 h (solar time). Average total hydraulic conductance was 60 ± 6 mmol s-1 MPa-1, presenting a slight decreasing trend as the season progressed. The analysis of tree K components showed that it was higher on the stem-leaf pathway (150 ± 50 mmol s-1 MPa-1), compared to the root-stem component (100 ± 20 mmol s-1 MPa-1), which is in agreement with literature reports for other fruit trees. A weak hysteresis pattern in the daily relationship between whole-canopy transpiration (weighted sunlit and shaded leaves) vs. Ψ was observed, suggesting that water storage within the tree is not a significant component of sweet cherry water balance.
author Oyarzún,Ricardo
Stöckle,Claudio
Whiting,Matthew
author_facet Oyarzún,Ricardo
Stöckle,Claudio
Whiting,Matthew
author_sort Oyarzún,Ricardo
title Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry Trees
title_short Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry Trees
title_full Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry Trees
title_fullStr Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry Trees
title_full_unstemmed Analysis of Hydraulic Conductance Components in Field Grown, Mature Sweet Cherry Trees
title_sort analysis of hydraulic conductance components in field grown, mature sweet cherry trees
publisher Instituto de Investigaciones Agropecuarias, INIA
publishDate 2010
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100006
work_keys_str_mv AT oyarzunricardo analysisofhydraulicconductancecomponentsinfieldgrownmaturesweetcherrytrees
AT stockleclaudio analysisofhydraulicconductancecomponentsinfieldgrownmaturesweetcherrytrees
AT whitingmatthew analysisofhydraulicconductancecomponentsinfieldgrownmaturesweetcherrytrees
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