Predawn leaf water potential of grapevines is not necessarily a good proxy for soil moisture

In plant water relations research, predawn leaf water potential (Ψ ) is often used as a proxy for soil water potential (Ψ ), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal...

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Published inBMC plant biology Vol. 23; no. 1; p. 369
Main Authors Groenveld, Thomas, Obiero, Charles, Yu, Yingxue, Flury, Markus, Keller, Markus
Format Journal Article
LanguageEnglish
Published England BioMed Central Ltd 25.07.2023
BioMed Central
BMC
Subjects
Analysis
Cultivars
Diseases and pests
Disequilibrium
Droughts
Environmental aspects
Equilibrium
field experimentation
Flowers & plants
Genetic aspects
Grapes
Grapevines
Growth
Hydraulics
Hydrostatics
leaf water potential
Leaves
Moisture content
Moisture effects
Nighttime transpiration
Regression analysis
Retention
Soil conditions
Soil moisture
Soil water
Soil water potential
Transpiration
United States
vineyards
Vitis
volumetric water content
Water content
Water potential
Water relations
Wineries & vineyards
Wines
United States
Model
Disequilibrium
Vitis
Soil water potential
Nighttime transpiration
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Abstract In plant water relations research, predawn leaf water potential (Ψ ) is often used as a proxy for soil water potential (Ψ ), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption Ψ  = Ψ for field-grown grapevines. A field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The Ψ and the volumetric soil water content (θ ) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (Ψ  >  - 0.14 MPa or relative extractable water content, θ  > 0.36), Ψ was significantly lower than Ψ for all 30 cultivars. Under dry soil conditions (Ψ  <  - 0.14 MPa or θ  < 0.36) Ψ lined up better with Ψ . There were differences between cultivars, but these were not consistent over the years. These results suggest that for wet soils Ψ of grapevines cannot be used as a proxy for Ψ , while the Ψ  = Ψ assumption may hold for dry soils.
AbstractList In plant water relations research, predawn leaf water potential (?.sub.pd) is often used as a proxy for soil water potential (?.sub.soil), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption ?.sub.pd = ?.sub.soil for field-grown grapevines. A field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The ?.sub.pd and the volumetric soil water content ([theta].sub.v) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (?.sub.soil > - 0.14 MPa or relative extractable water content, [theta].sub.e > 0.36), ?.sub.pd was significantly lower than ?.sub.soil for all 30 cultivars. Under dry soil conditions (?.sub.soil < - 0.14 MPa or [theta].sub.e < 0.36) ?.sub.pd lined up better with ?.sub.soil. There were differences between cultivars, but these were not consistent over the years. These results suggest that for wet soils ?.sub.pd of grapevines cannot be used as a proxy for ?.sub.soil, while the ?.sub.pd = ?.sub.soil assumption may hold for dry soils.
Background In plant water relations research, predawn leaf water potential (?.sub.pd) is often used as a proxy for soil water potential (?.sub.soil), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption ?.sub.pd = ?.sub.soil for field-grown grapevines. Results A field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The ?.sub.pd and the volumetric soil water content ([theta].sub.v) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (?.sub.soil > - 0.14 MPa or relative extractable water content, [theta].sub.e > 0.36), ?.sub.pd was significantly lower than ?.sub.soil for all 30 cultivars. Under dry soil conditions (?.sub.soil < - 0.14 MPa or [theta].sub.e < 0.36) ?.sub.pd lined up better with ?.sub.soil. There were differences between cultivars, but these were not consistent over the years. Conclusion These results suggest that for wet soils ?.sub.pd of grapevines cannot be used as a proxy for ?.sub.soil, while the ?.sub.pd = ?.sub.soil assumption may hold for dry soils. Keywords: Soil water potential, Model, Nighttime transpiration, Disequilibrium, Vitis
BACKGROUND: In plant water relations research, predawn leaf water potential (Ψₚd) is often used as a proxy for soil water potential (Ψₛₒᵢₗ), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption Ψₚd = Ψₛₒᵢₗ for field-grown grapevines. RESULTS: A field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The Ψₚd and the volumetric soil water content (θᵥ) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (Ψₛₒᵢₗ > − 0.14 MPa or relative extractable water content, θₑ > 0.36), Ψₚd was significantly lower than Ψₛₒᵢₗ for all 30 cultivars. Under dry soil conditions (Ψₛₒᵢₗ < − 0.14 MPa or θₑ < 0.36) Ψₚd lined up better with Ψₛₒᵢₗ. There were differences between cultivars, but these were not consistent over the years. CONCLUSION: These results suggest that for wet soils Ψₚd of grapevines cannot be used as a proxy for Ψₛₒᵢₗ, while the Ψₚd = Ψₛₒᵢₗ assumption may hold for dry soils.
In plant water relations research, predawn leaf water potential (Ψpd) is often used as a proxy for soil water potential (Ψsoil), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption Ψpd = Ψsoil for field-grown grapevines.BACKGROUNDIn plant water relations research, predawn leaf water potential (Ψpd) is often used as a proxy for soil water potential (Ψsoil), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption Ψpd = Ψsoil for field-grown grapevines.A field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The Ψpd and the volumetric soil water content (θv) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (Ψsoil >  - 0.14 MPa or relative extractable water content, θe > 0.36), Ψpd was significantly lower than Ψsoil for all 30 cultivars. Under dry soil conditions (Ψsoil <  - 0.14 MPa or θe < 0.36) Ψpd lined up better with Ψsoil. There were differences between cultivars, but these were not consistent over the years.RESULTSA field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The Ψpd and the volumetric soil water content (θv) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (Ψsoil >  - 0.14 MPa or relative extractable water content, θe > 0.36), Ψpd was significantly lower than Ψsoil for all 30 cultivars. Under dry soil conditions (Ψsoil <  - 0.14 MPa or θe < 0.36) Ψpd lined up better with Ψsoil. There were differences between cultivars, but these were not consistent over the years.These results suggest that for wet soils Ψpd of grapevines cannot be used as a proxy for Ψsoil, while the Ψpd = Ψsoil assumption may hold for dry soils.CONCLUSIONThese results suggest that for wet soils Ψpd of grapevines cannot be used as a proxy for Ψsoil, while the Ψpd = Ψsoil assumption may hold for dry soils.
BackgroundIn plant water relations research, predawn leaf water potential (Ψpd) is often used as a proxy for soil water potential (Ψsoil), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption Ψpd = Ψsoil for field-grown grapevines.ResultsA field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The Ψpd and the volumetric soil water content (θv) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (Ψsoil >  − 0.14 MPa or relative extractable water content, θe > 0.36), Ψpd was significantly lower than Ψsoil for all 30 cultivars. Under dry soil conditions (Ψsoil <  − 0.14 MPa or θe < 0.36) Ψpd lined up better with Ψsoil. There were differences between cultivars, but these were not consistent over the years.ConclusionThese results suggest that for wet soils Ψpd of grapevines cannot be used as a proxy for Ψsoil, while the Ψpd = Ψsoil assumption may hold for dry soils.
Abstract Background In plant water relations research, predawn leaf water potential (Ψpd) is often used as a proxy for soil water potential (Ψsoil), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption Ψpd = Ψsoil for field-grown grapevines. Results A field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The Ψpd and the volumetric soil water content (θv) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (Ψsoil >  − 0.14 MPa or relative extractable water content, θe > 0.36), Ψpd was significantly lower than Ψsoil for all 30 cultivars. Under dry soil conditions (Ψsoil <  − 0.14 MPa or θe < 0.36) Ψpd lined up better with Ψsoil. There were differences between cultivars, but these were not consistent over the years. Conclusion These results suggest that for wet soils Ψpd of grapevines cannot be used as a proxy for Ψsoil, while the Ψpd = Ψsoil assumption may hold for dry soils.
In plant water relations research, predawn leaf water potential (Ψ ) is often used as a proxy for soil water potential (Ψ ), without testing the underlying assumptions that nighttime transpiration is negligible and that enough time has passed for a hydrostatic equilibrium to be established. The goal of this research was to test the assumption Ψ  = Ψ for field-grown grapevines. A field trial was conducted with 30 different cultivars of wine grapes grown in a single vineyard in arid southeastern Washington, USA, for two years. The Ψ and the volumetric soil water content (θ ) under each sampled plant were measured multiple times during several dry-down cycles. The results show that in wet soil (Ψ  >  - 0.14 MPa or relative extractable water content, θ  > 0.36), Ψ was significantly lower than Ψ for all 30 cultivars. Under dry soil conditions (Ψ  <  - 0.14 MPa or θ  < 0.36) Ψ lined up better with Ψ . There were differences between cultivars, but these were not consistent over the years. These results suggest that for wet soils Ψ of grapevines cannot be used as a proxy for Ψ , while the Ψ  = Ψ assumption may hold for dry soils.
ArticleNumber 369
Audience Academic
Author Flury, Markus
Groenveld, Thomas
Obiero, Charles
Yu, Yingxue
Keller, Markus
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  surname: Groenveld
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  fullname: Flury, Markus
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  surname: Keller
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Issue 1
Keywords Model
Disequilibrium
Vitis
Soil water potential
Nighttime transpiration
Language English
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PublicationDateYYYYMMDD 2023-07-25
PublicationDate_xml – month: 07
  year: 2023
  text: 2023-07-25
  day: 25
PublicationDecade 2020
PublicationPlace England
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PublicationTitle BMC plant biology
PublicationTitleAlternate BMC Plant Biol
PublicationYear 2023
Publisher BioMed Central Ltd
BioMed Central
BMC
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– name: BMC
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Snippet In plant water relations research, predawn leaf water potential (Ψ ) is often used as a proxy for soil water potential (Ψ ), without testing the underlying...
In plant water relations research, predawn leaf water potential (?.sub.pd) is often used as a proxy for soil water potential (?.sub.soil), without testing the...
Background In plant water relations research, predawn leaf water potential (?.sub.pd) is often used as a proxy for soil water potential (?.sub.soil), without...
BackgroundIn plant water relations research, predawn leaf water potential (Ψpd) is often used as a proxy for soil water potential (Ψsoil), without testing the...
In plant water relations research, predawn leaf water potential (Ψpd) is often used as a proxy for soil water potential (Ψsoil), without testing the underlying...
BACKGROUND: In plant water relations research, predawn leaf water potential (Ψₚd) is often used as a proxy for soil water potential (Ψₛₒᵢₗ), without testing...
Abstract Background In plant water relations research, predawn leaf water potential (Ψpd) is often used as a proxy for soil water potential (Ψsoil), without...
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StartPage 369
SubjectTerms Analysis
Cultivars
Diseases and pests
Disequilibrium
Droughts
Environmental aspects
Equilibrium
field experimentation
Flowers & plants
Genetic aspects
Grapes
Grapevines
Growth
Hydraulics
Hydrostatics
leaf water potential
Leaves
Moisture content
Moisture effects
Nighttime transpiration
Regression analysis
Retention
Soil conditions
Soil moisture
Soil water
Soil water potential
Transpiration
United States
vineyards
Vitis
volumetric water content
Water content
Water potential
Water relations
Wineries & vineyards
Wines
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Title Predawn leaf water potential of grapevines is not necessarily a good proxy for soil moisture
URI https://www.ncbi.nlm.nih.gov/pubmed/37488482
https://www.proquest.com/docview/2852033542
https://www.proquest.com/docview/2841880987
https://www.proquest.com/docview/3153191081
https://pubmed.ncbi.nlm.nih.gov/PMC10367393
https://doaj.org/article/c81f9b0e5cd1402389890a20030a8e54
Volume 23
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