Fig. 3.

Expression patterns of T. hassleriana B-class genes. Expression patterns of the ThAP3 paralogs (a, e, i, m), ThPI-1 (b, f, j, n) and ThPI-2 (c, g, k, o) as determined by RNA in situ hybridization. Expression was determined in early developmental stages before organ primordia were formed (a-c, i-k) as well as later during organ differentiation (e-g, m-o). Schematics of the different developmental stages and planes are shown in d, h, (longitudinal),L and P, (cross). Br=bract; S=Sepal primordia (green); P/St = whorls giving rise to petals and stamens; P = petal primordia (purple); St = stamen primordia (yellow); C = carpel primordia (orange); Fm = floral meristem. Scale bar = 100 μm