Expression of PAN protein in clv1-4, clv3-2, ett-3, wig-1, and tsl-1 mutants. (A–B) clv1-4. PAN is expressed in the inflorescence meristem (im), the floral meristem (fm, A), and the fifth-whorl (5w) of clv1-4 flowers (B). PAN protein expression is normal in the inflorescence meristem and the floral meristem in clv3-2 (C), ett-3 (D), wig-1 (E), and tsl-1 (F) flowers. (se) Sepal; (p) petal; (st) stamen; (c) carpel. The number indicated corresponds to the developmental stage of each flower (Smyth et al. 1990). Bar, 20 μm.