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A hydromechanical and biochemical model of stomatal conductance

Open access
BUCKLEY, T. N., MOTT, K. A., FARQUHAR, G. D.·2003·Plant, Cell & Environment

Abstract

A mathematical model of stomatal conductance is presented. It is based on whole‐plant and epidermal hydromechanics, and on two hypotheses: (1) the osmotic gradient across guard cell membranes is proportional to the concentration of ATP in the guard cells; and (2) the osmotic gradient that can be sustained per unit of ATP is proportional to the turgor pressure of adjacent epidermal cells. In the present study, guard cell [ATP] is calculated using a previously published model that is based on a widely used biochemical model of C 3 mesophyll photosynthesis. The conductance model for Vicia faba L. is parameterized and tested As with most other stomatal models, the present model correctly predicts the stomatal responses to variations in transpiration rate, irradiance and intercellular CO 2. Unlike most other models, however, this model can predict the transient stomatal opening often observed before conductance declines in response to decreases in humidity, soil water potential, or xylem conductance. The model also explicitly accommodates the mechanical advantage of the epidermis and correctly predicts that stomata are relatively insensitive to the ambient partial pressure of oxygen, as a result of the assumed dependence on ATP concentration.

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Metadata

Authors
BUCKLEY, T. N., MOTT, K. A., & FARQUHAR, G. D.
Venue
Plant, Cell & Environment
Publisher
Wiley
Published
2003-09-26
Volume
26
Issue
10
Pages
1767-1785
ISSN
  • 0140-7791 (ISSN-L)
  • 1365-3040
OpenAlex
W1972975304
Cited by
352
References
1
FWCI
10.73
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: A hydromechanical and biochemical model of stomatal conductance. https://app.cochat.ai/papers/10.1046/j.1365-3040.2003.01094.x
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BUCKLEY, T. N., MOTT, K. A., & FARQUHAR, G. D. (2003). A hydromechanical and biochemical model of stomatal conductance. Plant, Cell & Environment. https://doi.org/10.1046/j.1365-3040.2003.01094.x

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.