Adjustable epidermal pore flanked by two guard cells. Opening allows CO2 influx + H2O vapour efflux. Regulated by light (blue), CO2, ABA. ABA + drought → stomatal closure.
Adjustable epidermal pore flanked by two guard cells. Opening allows CO2 influx + H2O vapour efflux. Regulated by light (blue), CO2, ABA. ABA + drought → stomatal closure.