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Modeling the dynamics of pressure propagation and diameter variation in tree sapwood

A non-steady-state model of water tension propagation in tree stems was developed. The model is based on the cohesion theory and the assumption that fluctuating water tension driven by transpiration together with the elasticity of wood cause variations in the diameter of a tree stem. The change in x...

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Published in:	Tree physiology 2005-09, Vol.25 (9), p.1091-1099
Main Authors:	Peramaki, M, Vesala, T, Nikinmaa, E
Format:	Article
Language:	English
Subjects:	diurnal variation equations mathematical models Models, Biological osmotic pressure Pinus - anatomy & histology Pinus - physiology Pressure sap flow sapwood stems transpiration trees Trees - anatomy & histology Trees - physiology Water - metabolism water uptake Wood - anatomy & histology Wood - physiology xylem
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container_title	Tree physiology
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creator	Peramaki, M Vesala, T Nikinmaa, E
description	A non-steady-state model of water tension propagation in tree stems was developed. The model is based on the cohesion theory and the assumption that fluctuating water tension driven by transpiration together with the elasticity of wood cause variations in the diameter of a tree stem. The change in xylem diameter can be linked to water tension in accordance with Hooke's law. The model was tested against field measurements of the diurnal change in xylem diameter at different heights in a 180-year-old Scots pine tree at Hyytiala, southern Finland. Model predictions agreed well with measurements. The effect of tree dimensions on pressure propagation was examined with the model. The model outcomes were also consistent with results of several field measurements presented in the literature.
doi_str_mv	10.1093/treephys/25.9.1091
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source	Oxford Journals Online
subjects	diurnal variation equations mathematical models Models, Biological osmotic pressure Pinus - anatomy & histology Pinus - physiology Pressure sap flow sapwood stems transpiration trees Trees - anatomy & histology Trees - physiology Water - metabolism water uptake Wood - anatomy & histology Wood - physiology xylem
title	Modeling the dynamics of pressure propagation and diameter variation in tree sapwood
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