Fig. 2 . Development of ectopic outgrowths in Arabidopsis as1 pgy1. (A-C) Adaxial surface of a late rosette leaf from 12-day-old plants of wild type (A), as1 (B) and as1 pgy1, showing a dome-shaped structure (arrow) of an initiating outgrowth (C). (D,E) as1 pgy1 late rosette leaves from 15-day-old plants, showing ectopic outgrowths forming peg-like structures. (F) as1 pgy1 late rosette leaf from an 18-day-old plant forms a leaf-like structure with trichomes on the adaxial side but not on the abaxial side of an ectopic outgrowth. Scale bars: 100 µm.