Fig. 2. Transverse sections showing the effects of the as2 mutation on petiole anatomy. (A) Ler petiole. (B) Lotus-leaf petiole of as2-101. (C) Non-lotus-leaf petiole of as2-101. Note that three vascular bundles were seen in the mutant. d, adaxial epidermis between two arrowheads; b, abaxial epidermis between two small arrows; pa, parenchyma; vs, vascular bundle. The small and dense epidermal cells between the arrowheads and small arrow are the petiole margin epidermis in the Ler plant. Scale bars: 0.1 mm.