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Comparing model predictions and experimental data for the response of stomatal conductance and guard cell turgor to manipulations of cuticular conductance, leaf-to-air vapour pressure difference and temperature: Feedback mechanisms are able to account for

Eamus, Derek, Taylor, Daniel t., Macinnis-Ng, Catriona M.O., Shanahan, Stephen T. and De Silva L. (2008). Comparing model predictions and experimental data for the response of stomatal conductance and guard cell turgor to manipulations of cuticular conductance, leaf-to-air vapour pressure difference and temperature: Feedback mechanisms are able to account for all observations. Plant, Cell and Environment,31(3):269-277.

Document type: Journal Article
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Title Comparing model predictions and experimental data for the response of stomatal conductance and guard cell turgor to manipulations of cuticular conductance, leaf-to-air vapour pressure difference and temperature: Feedback mechanisms are able to account for all observations
Author Eamus, Derek
Taylor, Daniel t.
Macinnis-Ng, Catriona M.O.
Shanahan, Stephen T.
De Silva L.
Journal Name Plant, Cell and Environment
Publication Date 2008
Volume Number 31
Issue Number 3
ISSN 0140-7791   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-38849129471
Start Page 269
End Page 277
Total Pages 9
Place of Publication United Kingdom
Publisher Wiley-Blackwell Publishing Ltd
Field of Research 1110 - Nursing
Abstract Stomata respond to increasing leaf-to-air vapour pressure difference (LAVPD) (D) by closing. The mechanism by which this occurs is debated. A role for feedback and peristomatal transpiration has been proposed. In this paper, we apply a recent mechanistic model of stomatal behaviour, and compare model and experimental data for the influence of increasing D on stomatal conductance. We manipulated cuticular conductance (gc) by three independent methods. First, we increased gc by using a solvent mixture applied to both leaf surfaces prior to determining stomatal responses to D; second, we increased gc by increasing leaf temperature at constant D; and third, we coated a small area of leaf with a light oil to decrease gc. In all three experiments, experimental data and model outputs showed very close agreement. We conclude, from the close agreement between model and experimental data and the fact that manipulations of gc, and hence cuticular transpiration, influenced gs in ways consistent with a feedback mechanism, that feedback is central in determining stomatal responses to D.
Keywords Feedback responses of stomatal conductance to VPD
Modelling
DOI http://dx.doi.org/10.1111/j.1365-3040.2007.01771.x   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Fri, 29 Aug 2014, 18:11:36 CST by Anthony Hornby