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

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Title:Main Title: Simulating transpiration and leaf water relations in response to heterogeneous soil moisture and different stomatal control mechanisms
Description: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
Creators:Katrin Huber (Author), Jan Vanderborght (Author), Mathieu Javaux (Author), Harry Vereecken (Author)
Publisher:Springer International Publishing Switzerland
Publication Year:2018
Topic
TR32 Topic:Soil
Related Subproject:B4
Subjects:Keywords: Root, Soil Moisture, Numerical Simulation
Geogr. Information Topic:Environment
File Details
Filename:Huber2015.pdf
Data Type:Text - Article
File Size:753 KB
Date:Available: 18.06.2018
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Only Project Members
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:[TR32DB] Data policy agreement
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Specific Information - Publication
Publication Status:Accepted
Review Status:Peer reviewed
Publication Type:Article
Source:Plant and Soil
Number of Pages:18 (109 - 126)
Metadata Details
Metadata Creator:Mirjam Zörner
Metadata Created:19.06.2018
Metadata Last Updated:19.06.2018
Subproject:B4
Funding Phase:3
Metadata Language:English
Metadata Version:V50
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