Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency
Phenotypic plasticity in morphophysiological leaf traits in response to wind was studied in two dominant shrub species of the Patagonian steppe, used as model systems for understanding effects of high wind speed on leaf water relations and hydraulic properties of small woody plants. Morpho-anatomica...
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todo:paper_00298549_v173_n3_p675_Iogna2023-10-03T14:39:43Z Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency Iogna, P.A. Bucci, S.J. Scholz, F.G. Goldstein, G. Hydraulic conductance Osmotic potential Patagonia Stomatal conductance Wind adaptation canopy architecture desert homeostasis osmosis phenotypic plasticity saturation shrub stomatal conductance water availability Berberis Berberis microphylla Colliguaja integerrima water Argentina article Berberis desert climate Euphorbiaceae evapotranspiration histology homeostasis metabolism nonparametric test phenotype physiology plant leaf plant stoma pressure wind Argentina Berberis Desert Climate Euphorbiaceae Homeostasis Phenotype Plant Leaves Plant Stomata Plant Transpiration Pressure Statistics, Nonparametric Water Wind Phenotypic plasticity in morphophysiological leaf traits in response to wind was studied in two dominant shrub species of the Patagonian steppe, used as model systems for understanding effects of high wind speed on leaf water relations and hydraulic properties of small woody plants. Morpho-anatomical traits, hydraulic conductance and conductivity and water relations in leaves of wind-exposed and protected crown sides were examined during the summer with nearly continuous high winds. Although exposed sides of the crowns were subjected to higher wind speeds and air saturation deficits than the protected sides, leaves throughout the crown had similar minimum leaf water potential (ΨL). The two species were able to maintain homeostasis in minimum ΨL using different physiological mechanisms. Berberis microphylla avoided a decrease in the minimum ΨL in the exposed side of the crown by reducing water loss by stomatal control, loss of cell turgor and low epidermal conductance. Colliguaja integerrima increased leaf water transport efficiency to maintain transpiration rates without increasing the driving force for water loss in the wind-exposed crown side. Leaf physiological changes within the crown help to prevent the decrease of minimum ΨL and thus contribute to the maintenance of homeostasis, assuring the hydraulic integrity of the plant under unfavorable conditions. The responses of leaf traits that contribute to mechanical resistance (leaf mass per area and thickness) differed from those of large physiological traits by exhibiting low phenotypic plasticity. The results of this study help us to understand the unique properties of shrubs which have different hydraulic architecture compared to trees. © 2013 Springer-Verlag Berlin Heidelberg. Fil:Bucci, S.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Scholz, F.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Goldstein, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00298549_v173_n3_p675_Iogna |
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Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Hydraulic conductance Osmotic potential Patagonia Stomatal conductance Wind adaptation canopy architecture desert homeostasis osmosis phenotypic plasticity saturation shrub stomatal conductance water availability Berberis Berberis microphylla Colliguaja integerrima water Argentina article Berberis desert climate Euphorbiaceae evapotranspiration histology homeostasis metabolism nonparametric test phenotype physiology plant leaf plant stoma pressure wind Argentina Berberis Desert Climate Euphorbiaceae Homeostasis Phenotype Plant Leaves Plant Stomata Plant Transpiration Pressure Statistics, Nonparametric Water Wind |
| spellingShingle |
Hydraulic conductance Osmotic potential Patagonia Stomatal conductance Wind adaptation canopy architecture desert homeostasis osmosis phenotypic plasticity saturation shrub stomatal conductance water availability Berberis Berberis microphylla Colliguaja integerrima water Argentina article Berberis desert climate Euphorbiaceae evapotranspiration histology homeostasis metabolism nonparametric test phenotype physiology plant leaf plant stoma pressure wind Argentina Berberis Desert Climate Euphorbiaceae Homeostasis Phenotype Plant Leaves Plant Stomata Plant Transpiration Pressure Statistics, Nonparametric Water Wind Iogna, P.A. Bucci, S.J. Scholz, F.G. Goldstein, G. Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency |
| topic_facet |
Hydraulic conductance Osmotic potential Patagonia Stomatal conductance Wind adaptation canopy architecture desert homeostasis osmosis phenotypic plasticity saturation shrub stomatal conductance water availability Berberis Berberis microphylla Colliguaja integerrima water Argentina article Berberis desert climate Euphorbiaceae evapotranspiration histology homeostasis metabolism nonparametric test phenotype physiology plant leaf plant stoma pressure wind Argentina Berberis Desert Climate Euphorbiaceae Homeostasis Phenotype Plant Leaves Plant Stomata Plant Transpiration Pressure Statistics, Nonparametric Water Wind |
| description |
Phenotypic plasticity in morphophysiological leaf traits in response to wind was studied in two dominant shrub species of the Patagonian steppe, used as model systems for understanding effects of high wind speed on leaf water relations and hydraulic properties of small woody plants. Morpho-anatomical traits, hydraulic conductance and conductivity and water relations in leaves of wind-exposed and protected crown sides were examined during the summer with nearly continuous high winds. Although exposed sides of the crowns were subjected to higher wind speeds and air saturation deficits than the protected sides, leaves throughout the crown had similar minimum leaf water potential (ΨL). The two species were able to maintain homeostasis in minimum ΨL using different physiological mechanisms. Berberis microphylla avoided a decrease in the minimum ΨL in the exposed side of the crown by reducing water loss by stomatal control, loss of cell turgor and low epidermal conductance. Colliguaja integerrima increased leaf water transport efficiency to maintain transpiration rates without increasing the driving force for water loss in the wind-exposed crown side. Leaf physiological changes within the crown help to prevent the decrease of minimum ΨL and thus contribute to the maintenance of homeostasis, assuring the hydraulic integrity of the plant under unfavorable conditions. The responses of leaf traits that contribute to mechanical resistance (leaf mass per area and thickness) differed from those of large physiological traits by exhibiting low phenotypic plasticity. The results of this study help us to understand the unique properties of shrubs which have different hydraulic architecture compared to trees. © 2013 Springer-Verlag Berlin Heidelberg. |
| format |
JOUR |
| author |
Iogna, P.A. Bucci, S.J. Scholz, F.G. Goldstein, G. |
| author_facet |
Iogna, P.A. Bucci, S.J. Scholz, F.G. Goldstein, G. |
| author_sort |
Iogna, P.A. |
| title |
Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency |
| title_short |
Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency |
| title_full |
Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency |
| title_fullStr |
Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency |
| title_full_unstemmed |
Homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: Water loss control vs. high hydraulic efficiency |
| title_sort |
homeostasis in leaf water potentials on leeward and windward sides of desert shrub crowns: water loss control vs. high hydraulic efficiency |
| url |
http://hdl.handle.net/20.500.12110/paper_00298549_v173_n3_p675_Iogna |
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