Fig. 2. Transverse sections of wild type, w, w3 and w6. The adaxial side is marked by asterisks. (A,B) Wild-type leaf; (C) wild-type stem; (D) wild-type petiole. (E) w3, (G) w6 and (H) w wire-like leaves. (F) w3 leaf with ectopic distal leaves. Vascular bundle arrangement is intermediate between that of leaf and stem. (I) w3 and (J) w6 expanded leaves. (K) w expanded leaf showing normal ab-adaxiality. (L-N) Vascular bundles showing the reduced adaxial domain (arrowheads) in w3 (L), and w6 (M) and abnormal vascular bundle in w expanded leaf (N). p, phloem, x, xylem. Scale bars: (A) 100 µm, (B,E-L) 50 µm, (C) 10 µm, (D) 20 µm, (M,N) 25 µm.

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