Simulated stomatal opening levels and osmotic compositions under various conditions of light, CO2, and node disruptions.

The CO2 conditions studied are: ambient CO2 concentration (CO2 = 1, top of the table), CO2-free air (CO2 = 0, middle), and elevated CO2 concentration (CO2 = 2, bottom). Simulated H+-ATPase knockout (H+-ATPasecomplex = 0) severely impairs stomatal opening in the cases where ions are the predominant osmotica, e.g. under CO2-free air. Computationally imposed sucrose depletion (sucrose = 0), on the other hand, inhibits stomatal opening in cases where sucrose is the major osmoticum, e.g. under elevated CO2 concentration.Simulated stomatal opening levels and osmotic compositions under various conditions of light, CO2, and node disruptions.