The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates
Leaf hydraulic conductance (Kleaf) is known to be an important determinant of plant gas exchange and photosynthesis. Little is known about the long-term impact of different environmental factors on the hydraulic construction of leaves and its eventual consequences on leaf gas exchange. In this study, we investigate the impact of soil water availability on K leaf of Fraxinus ornus L. as well as the influence of K leaf on gas exchange rates and plant water status. With this aim, Kleaf, leaf conductance to water vapour (gL), leaf water potential (Ψleaf) and leaf mass per area (LMA) were measured in F. ornus trees, growing in 21 different sites with contrasting water availability. Plants growing in arid sites had lower Kleaf, gL and Ψleaf than those growing in sites with higher water availability. On the contrary, LMA was similar in the two groups. The Kleaf values recorded in sites with two different levels of soil water availability were constantly different from each other regardless of the amount of precipitation recorded over 20 days before measurements. Moreover, Kleaf was correlated with gL values. Our data suggest that down-regulation of Kleaf is a component of adaptation of plants to drought-prone habitats. Low Kleaf implies reduced gas exchange which may, in turn, influence the climatic conditions on a local/regional scale. It is concluded that leaf hydraulics and its changes in response to resource availability should receive greater attention in studies aimed at modelling biosphereatmosphere interactions.
Main Authors: | , , , |
---|---|
Format: | journal article biblioteca |
Language: | eng |
Published: |
2009
|
Online Access: | http://hdl.handle.net/20.500.12792/1971 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-inia-es-20.500.12792-1971 |
---|---|
record_format |
koha |
spelling |
dig-inia-es-20.500.12792-19712020-12-15T09:52:29Z The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates Gortan, E. Nardini, A. Gascó, A. Salleo, S. Leaf hydraulic conductance (Kleaf) is known to be an important determinant of plant gas exchange and photosynthesis. Little is known about the long-term impact of different environmental factors on the hydraulic construction of leaves and its eventual consequences on leaf gas exchange. In this study, we investigate the impact of soil water availability on K leaf of Fraxinus ornus L. as well as the influence of K leaf on gas exchange rates and plant water status. With this aim, Kleaf, leaf conductance to water vapour (gL), leaf water potential (Ψleaf) and leaf mass per area (LMA) were measured in F. ornus trees, growing in 21 different sites with contrasting water availability. Plants growing in arid sites had lower Kleaf, gL and Ψleaf than those growing in sites with higher water availability. On the contrary, LMA was similar in the two groups. The Kleaf values recorded in sites with two different levels of soil water availability were constantly different from each other regardless of the amount of precipitation recorded over 20 days before measurements. Moreover, Kleaf was correlated with gL values. Our data suggest that down-regulation of Kleaf is a component of adaptation of plants to drought-prone habitats. Low Kleaf implies reduced gas exchange which may, in turn, influence the climatic conditions on a local/regional scale. It is concluded that leaf hydraulics and its changes in response to resource availability should receive greater attention in studies aimed at modelling biosphereatmosphere interactions. 2020-10-22T12:23:56Z 2020-10-22T12:23:56Z 2009 journal article http://hdl.handle.net/20.500.12792/1971 10.1093/treephys/tpn053 eng Attribution-NonCommercial-ShareAlike 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/ open access |
institution |
INIA ES |
collection |
DSpace |
country |
España |
countrycode |
ES |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-inia-es |
tag |
biblioteca |
region |
Europa del Sur |
libraryname |
Biblioteca del INIA España |
language |
eng |
description |
Leaf hydraulic conductance (Kleaf) is known to be an important determinant of plant gas exchange and photosynthesis. Little is known about the long-term impact of different environmental factors on the hydraulic construction of leaves and its eventual consequences on leaf gas exchange. In this study, we investigate the impact of soil water availability on K leaf of Fraxinus ornus L. as well as the influence of K leaf on gas exchange rates and plant water status. With this aim, Kleaf, leaf conductance to water vapour (gL), leaf water potential (Ψleaf) and leaf mass per area (LMA) were measured in F. ornus trees, growing in 21 different sites with contrasting water availability. Plants growing in arid sites had lower Kleaf, gL and Ψleaf than those growing in sites with higher water availability. On the contrary, LMA was similar in the two groups. The Kleaf values recorded in sites with two different levels of soil water availability were constantly different from each other regardless of the amount of precipitation recorded over 20 days before measurements. Moreover, Kleaf was correlated with gL values. Our data suggest that down-regulation of Kleaf is a component of adaptation of plants to drought-prone habitats. Low Kleaf implies reduced gas exchange which may, in turn, influence the climatic conditions on a local/regional scale. It is concluded that leaf hydraulics and its changes in response to resource availability should receive greater attention in studies aimed at modelling biosphereatmosphere interactions. |
format |
journal article |
author |
Gortan, E. Nardini, A. Gascó, A. Salleo, S. |
spellingShingle |
Gortan, E. Nardini, A. Gascó, A. Salleo, S. The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates |
author_facet |
Gortan, E. Nardini, A. Gascó, A. Salleo, S. |
author_sort |
Gortan, E. |
title |
The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates |
title_short |
The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates |
title_full |
The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates |
title_fullStr |
The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates |
title_full_unstemmed |
The hydraulic conductance of Fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates |
title_sort |
hydraulic conductance of fraxinus ornus leaves is constrained by soil water availability and coordinated with gas exchange rates |
publishDate |
2009 |
url |
http://hdl.handle.net/20.500.12792/1971 |
work_keys_str_mv |
AT gortane thehydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates AT nardinia thehydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates AT gascoa thehydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates AT salleos thehydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates AT gortane hydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates AT nardinia hydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates AT gascoa hydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates AT salleos hydraulicconductanceoffraxinusornusleavesisconstrainedbysoilwateravailabilityandcoordinatedwithgasexchangerates |
_version_ |
1758004851529220096 |