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Outline Mechanism for CO2/Ozone InteractionThe new ozone model is combined with both a mechanistic biochemical model of leaf photosynthesis and a phenomenological model of stomatal conductance to investigate the degree of dependency of ozone-induced stomatal closure on changes in the mesophyll, via the reduction in Vcmax. The model was integrated into WIMOVAC, and the predicted stomatal conductance of the model simulation was compared with the magnitude of stomatal closure measured by Farage et al. (1991). The results indicate that, at least under these experimental conditions, the stomatal changes caused by acute ozone exposure occurred as a result of changes in the mesophyll.
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