Figure 3.

Number and aperture of stomata in fully expanded leaves of mutant and silenced plants. Stomata frequency (stomata mm⁻² leaf surface area) and aperture (μm) were determined. Values presented are means ± se of measurements made on 16 to 18 samples (stomata frequency) and on 78 to 80 stomata (aperture) from four individual plants per genotype. Plants were grown for 2 weeks under axenic conditions and then for 4 weeks in soil. Asterisks indicate values that were determined by t test to be significantly different from the wild type (* P < 0.05, *** P < 0.01).