Fig. 2. Scanning electron micrographs of mature and developing flowers of wild-type and hen2-1 single, and double and triple mutants with hua1-1 and hua2-1. (A) Ler inflorescence meristem. (B) hen2-1 inflorescence meristem, note crowding of lateral sepals towards the adaxial sepal in top developing flower (arrows). (C) Ler at stage 4-5 with four evenly spaced sepal primordia. (D) hen2-1 at stage 4-5, note extra sepals and disrupted spacing of sepals. (E) Ler abaxial sepal cells, note epicuticular striations and the long cell. (F) Ler adaxial petal cells. (G) Ler abaxial petal cells. (H) Ler stamen cells. (I) A hen2-1 hua1-1 hua2-1 third whorl organ. (J) Higher magnification of part of I, showing patches of abaxial petal (arrow) and sepal-like cells (arrowhead). (K) Detail of a hen2-1 hua1-1 hua2-1 third whorl organ showing both petal (arrow) and stamen-like cell types (arrowhead). (L) Ler ovary valve cells. (M) The top, lateral region of a hua1-1 hua2-1 ovary showing presence of ovary (arrow) and sepal-like cells (arrowhead). (N) The top, lateral area of a hen2-1 hua1-1 ovary, note cells with both ovary (arrow) and sepal characteristics (arrowhead). (O) The top, lateral portion of a hen2-1 hua2-1 ovary with both ovary (arrow) and sepal-like cells (arrowhead). (P) hen2-1 hua1-1 hua2-1 ovary cells, all have sepal-like features. (Q) hua1-1 hua2-1 at stage 7-8, note stalk of developing stamen (arrow). (R) hen2-1 hua1-1 hua2-1 at stage 7-8 showing large, flat third whorl organs. Scale bars, 10 µm (C,D,E-H,J-P), 50 µm (I), 100 µm (A,B,Q,R).
