Fig. 3. Effect of hst-1 on phase change. (A) Rosette leaf and bract morphology of hst-1 and wild-type plants (Col). Gray, no abaxial trichomes; black, abaxial trichomes; underline, bracts. (B) Adaxial trichome density of rosette leaves and bracts in hst-1 and wild-type plants (C) The blade:petiole length ratio of rosette leaves in hst-1 and wild-type plants. (D) Rate of leaf initiation in hst-1 and wild-type plants. Arrows indicate the position of the first leaf with abaxial trichomes in siblings of the dissected plants; asterisks indicate the time at which GUS-stained floral buds were visible. White circles, wild type; black circles, hst-1.