Fig. 1. Epidermal phenotypes of pir trichomes, cotyledon pavement cells and hypocotyls. (A) SEM of developing trichomes on the upper surface of developing wild-type leaves. (B) SEM of developing trichomes on the upper surface of pir-3 leaves. (C) SEM of upper surface of 12 DAG (days after germination) wild-type cotyledon pavement cells. (D) SEM of upper surface of 12 DAG pir-3 cotyledon pavement cells. (E) Hypocotyl of dark-grown wild-type seedlings. (F) Hypocotyl of dark-grown pir-3 seedlings (boxed area is enlarged in the inset, which shows a higher magnification view of the non-adherant cell). (G) Wild-type plant (15 DAG). (H) pir-3 plant (15 DAG). Numbers in A and B are positioned in the lower right region of a trichome to indicate the developmental stage. White arrows indicate the gaps between adjacent pavement cells and black arrows indicate stomatal pores in C,D. Scale bars: 100 µm in A-F; 1 cm in G,H.