Figure 1.

Macroscopic outputs from the OnGuard model resolved over the diurnal Reference Cycle (see text) with the standard environmental parameters of 10 mm KCl, 1 mm CaCl₂, and pH 6.5. Data represent a 5-d window of the stable Reference Cycle (12 h light:12 h dark, indicated by bars above). OnGuard model parameters are those described in the preceding article (Hills et al., 2012). Shown are plasma membrane and tonoplast voltage (A), stomatal aperture, turgor pressure, and total guard cell volume (B), and the percentage of cell volume occupied by the vacuole (C).