Fig. 4. SEM of epidermal cells of Ler, as2-101 and 35S::AS2/Ler leaves. (A) Adaxial surface of the proximal part of a Ler lamina. (B) The boxed region of A showing a close-up of two types of epidermal cells. (C) Adaxial epidermal cells on a Ler petiole. Arrowhead, margin cells; arrow, adaxial cells. (D) The proximal part of the adaxial surface of an as2-101 lamina. (E) The boxed region of D showing a close-up of the long and narrow epidermal cells. (F) Adaxial epidermal cells on an as2-101 petiole, showing that all epidermal cells on the petiole are long and narrow. Note that these cells show a very similar pattern to those found on the proximal part of the as2-101 leaf lamina in D, and are also similar to petiole margin epidermal cells of Ler. (G) Epidermal cells of an adaxial 35S::AS2 petiole. (H) The boxed region of G showing the uniformly shaped adaxial epidermis (white arrowhead) and the thick midvein-like epidermis (black arrowhead). (I) Abaxial side of a 35S::AS2 petiole with mosaic adaxial and abaxial patches. Scale bars: 0.2 mm (A,D); 0.1 mm (B,C,E-G,I); 0.05 mm (H).

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