[1799] - Simulating transpiration and leaf water relations in response to heterogeneous soil moisture and different stomatal control mechanisms

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Citation
Huber, K., Vanderborght, J., Javaux, M., Vereecken, H., 2015. Simulating transpiration and leaf water relations in response to heterogeneous soil moisture and different stomatal control mechanisms. Plant and Soil, 109 - 126.
Identification
Title(s):Main Title: Simulating transpiration and leaf water relations in response to heterogeneous soil moisture and different stomatal control mechanisms
Description(s):Abstract: Aims Stomata can close to avoid cavitation under decreased soil water availability. This closure can be triggered by hydraulic (‘H’) and/or chemical signals (‘C’, ‘H + C’). By combining plant hydraulic relations with a model for stomatal conductance, including chemical signalling, our aim was to derive direct relations that link soil water availability, expressed as fraction of roots in dry soil (fdry), to transpiration reduction. Methods We used the mechanistic soil-root water flow model R-SWMS to verify this relation. Virtual split root experiments were simulated, comparing horizontal and vertical splits with varying fdry and different strengths of stomatal regulation by chemical and hydraulic signals. Results Transpiration reduction predicted by the direct relations was in good agreement with numerical simulations. For small enough potential transpiration and large enough root hydraulic conductivity and stomatal sensitivity to chemical signalling isohydric plant behaviour originates from H + C control whereas anisohydric
Citation Advice:K. Huber, J. Vanderborght, M. Javaux and H. Vereecken. Simulating transpiration and leaf water relations in response to heterogeneous soil moisture and different stomatal control mechanisms. Plant and Soil, 394,(1-2), 109-126, (2015).
Responsible Party
Creator(s):Author: Katrin Huber
Author: Jan Vanderborght
Author: Mathieu Javaux
Author: Harry Vereecken
Publisher:Springer International Publishing Switzerland
Topic
TR32 Topic:Soil
Related Sub-project(s):B4
Subject(s):CRC/TR32 Keywords: Root, Soil Moisture, Numerical Simulation
Topic Category:Environment
File Details
File Name:Huber2015.pdf
Data Type:Text
File Size:753 kB (0.735 MB)
Date(s):Available: 2018-06-18
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
Constraints
Download Permission:OnlyTR32
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
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Measurement Region:None
Measurement Location:--None--
Specific Informations - Publication
Status:Accepted
Review:PeerReview
Year:2015
Type:Article
Source:Plant and Soil
Page Range:109 - 126
Metadata Details
Metadata Creator:Mirjam Zörner
Metadata Created:2018-06-19
Metadata Last Updated:2018-06-19
Subproject:B4
Funding Phase:3
Metadata Language:English
Metadata Version:V42
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