Fig. 5.

NtMPK4L-silenced plants have significantly opened stomata. (A) Epidermis was observed in NtMPK4-IR6, NtMPK4-IR, NtMPK4L-IR, and vector control plants. Bar, 5 μm. (B) Stomatal apertures (width/length) were calculated. Error bars indicate standard deviations determined from three independent biological replicates. Asterisks indicate significant differences analyzed using Student’s t-test compared with the relevant vector control at P<0.01 (**). Three independent experiments were performed.