Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe
Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between s...
Ausführliche Beschreibung
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| Autor*in: |
Kangur, Ott [verfasserIn] Kupper, Priit [verfasserIn] Sellin, Arne [verfasserIn] |
|---|
| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Regional Environmental Change - Springer-Verlag, 2001, 17(2017), 7 vom: 10. Juni, Seite 2159-2168 |
|---|---|
| Übergeordnetes Werk: |
volume:17 ; year:2017 ; number:7 ; day:10 ; month:06 ; pages:2159-2168 |
| Links: |
|---|
| DOI / URN: |
10.1007/s10113-017-1183-8 |
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| 520 | |a Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. | ||
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10.1007/s10113-017-1183-8 doi (DE-627)SPR008881332 (SPR)s10113-017-1183-8-e DE-627 ger DE-627 rakwb eng Kangur, Ott verfasserin aut Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. Foliar water uptake (dpeaa)DE-He213 Free Air Humidity Manipulation (dpeaa)DE-He213 Hybrid aspen (dpeaa)DE-He213 Leaf water potential (dpeaa)DE-He213 Predawn disequilibrium (dpeaa)DE-He213 Vapour pressure deficit (dpeaa)DE-He213 Kupper, Priit verfasserin aut Sellin, Arne verfasserin aut Enthalten in Regional Environmental Change Springer-Verlag, 2001 17(2017), 7 vom: 10. Juni, Seite 2159-2168 (DE-627)SPR008808457 nnns volume:17 year:2017 number:7 day:10 month:06 pages:2159-2168 https://dx.doi.org/10.1007/s10113-017-1183-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 17 2017 7 10 06 2159-2168 |
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10.1007/s10113-017-1183-8 doi (DE-627)SPR008881332 (SPR)s10113-017-1183-8-e DE-627 ger DE-627 rakwb eng Kangur, Ott verfasserin aut Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. Foliar water uptake (dpeaa)DE-He213 Free Air Humidity Manipulation (dpeaa)DE-He213 Hybrid aspen (dpeaa)DE-He213 Leaf water potential (dpeaa)DE-He213 Predawn disequilibrium (dpeaa)DE-He213 Vapour pressure deficit (dpeaa)DE-He213 Kupper, Priit verfasserin aut Sellin, Arne verfasserin aut Enthalten in Regional Environmental Change Springer-Verlag, 2001 17(2017), 7 vom: 10. Juni, Seite 2159-2168 (DE-627)SPR008808457 nnns volume:17 year:2017 number:7 day:10 month:06 pages:2159-2168 https://dx.doi.org/10.1007/s10113-017-1183-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 17 2017 7 10 06 2159-2168 |
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10.1007/s10113-017-1183-8 doi (DE-627)SPR008881332 (SPR)s10113-017-1183-8-e DE-627 ger DE-627 rakwb eng Kangur, Ott verfasserin aut Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. Foliar water uptake (dpeaa)DE-He213 Free Air Humidity Manipulation (dpeaa)DE-He213 Hybrid aspen (dpeaa)DE-He213 Leaf water potential (dpeaa)DE-He213 Predawn disequilibrium (dpeaa)DE-He213 Vapour pressure deficit (dpeaa)DE-He213 Kupper, Priit verfasserin aut Sellin, Arne verfasserin aut Enthalten in Regional Environmental Change Springer-Verlag, 2001 17(2017), 7 vom: 10. Juni, Seite 2159-2168 (DE-627)SPR008808457 nnns volume:17 year:2017 number:7 day:10 month:06 pages:2159-2168 https://dx.doi.org/10.1007/s10113-017-1183-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 17 2017 7 10 06 2159-2168 |
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10.1007/s10113-017-1183-8 doi (DE-627)SPR008881332 (SPR)s10113-017-1183-8-e DE-627 ger DE-627 rakwb eng Kangur, Ott verfasserin aut Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. Foliar water uptake (dpeaa)DE-He213 Free Air Humidity Manipulation (dpeaa)DE-He213 Hybrid aspen (dpeaa)DE-He213 Leaf water potential (dpeaa)DE-He213 Predawn disequilibrium (dpeaa)DE-He213 Vapour pressure deficit (dpeaa)DE-He213 Kupper, Priit verfasserin aut Sellin, Arne verfasserin aut Enthalten in Regional Environmental Change Springer-Verlag, 2001 17(2017), 7 vom: 10. Juni, Seite 2159-2168 (DE-627)SPR008808457 nnns volume:17 year:2017 number:7 day:10 month:06 pages:2159-2168 https://dx.doi.org/10.1007/s10113-017-1183-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 17 2017 7 10 06 2159-2168 |
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10.1007/s10113-017-1183-8 doi (DE-627)SPR008881332 (SPR)s10113-017-1183-8-e DE-627 ger DE-627 rakwb eng Kangur, Ott verfasserin aut Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. Foliar water uptake (dpeaa)DE-He213 Free Air Humidity Manipulation (dpeaa)DE-He213 Hybrid aspen (dpeaa)DE-He213 Leaf water potential (dpeaa)DE-He213 Predawn disequilibrium (dpeaa)DE-He213 Vapour pressure deficit (dpeaa)DE-He213 Kupper, Priit verfasserin aut Sellin, Arne verfasserin aut Enthalten in Regional Environmental Change Springer-Verlag, 2001 17(2017), 7 vom: 10. Juni, Seite 2159-2168 (DE-627)SPR008808457 nnns volume:17 year:2017 number:7 day:10 month:06 pages:2159-2168 https://dx.doi.org/10.1007/s10113-017-1183-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 17 2017 7 10 06 2159-2168 |
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Kangur, Ott Kupper, Priit Sellin, Arne |
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Elektronische Aufsätze |
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Kangur, Ott |
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10.1007/s10113-017-1183-8 |
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predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern europe |
| title_auth |
Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe |
| abstract |
Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. |
| abstractGer |
Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. |
| abstract_unstemmed |
Abstract The study was performed on coppice shoots and 9-year-old saplings of hybrid aspen (Populus tremula L. × Populus tremuloides Michx.) growing at the Free Air Humidity Manipulation site in 2013 and 2014. The main aims of our study were to determine the differences in water potentials between soil and leaves before dawn and the major environmental factors preventing the overnight equilibration of water potential. Secondly, we investigated the impact of increasing relative air humidity—a climate trend predicted for northern Europe—on the equilibration. A relatively small predawn disequilibrium (PDD) was recorded both for coppice shoots and saplings: on average 0.042 and 0.066 MPa, respectively. We found a significant correlation between PDD and the vapour pressure deficit of ambient air (R2 = 0.80 and 0.66, respectively). The experiment with bagged leaves revealed that 76% (coppice shoots) and 47% (saplings) of the PDD are attributable to nocturnal transpiration. In coppice shoots, the magnitude of PDD is best explained by soil water availability. After cool and moist nights, when leaves were usually dew-wetted, the PDD was close to zero, supporting the idea of foliar uptake of water through the cuticle. After drier nights, predawn leaf water potential does not represent a reliable estimate of soil water potential even in moderately humid climates. Increasing atmospheric humidity does not affect the magnitude of PDD in hybrid aspen. However, the stomata of hybrid aspen remain open at night, which enables nocturnal transpiration and water loss from the foliage. |
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Predawn disequilibrium between soil and plant water potentials in light of climate trends predicted for northern Europe |
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