Fig. 2. Scanning electron micrographs of gynoecia of wild type, the sty1-1 mutant and the sty1-1 sty2-1 double mutant. (A) Medial view of a stage 13 wild-type gynoecium. Stigma, style, the two valves and the abaxial replum are indicated. (B-D) Medial views of sty1-1 single mutant gynoecia of increasing age: (B) stage 12, (C) stage 13, (D) stage 15. Note the style cells in apical positions (C,D, arrowheads). (E) Top view of a stage 12 sty1-1 sty2-1 double mutant gynoecium. Arrowhead points to misplaced apical and adaxial style cells. (F-G) Stage 13 sty1-1 sty2-1 double mutant gynoecia that have developed short horn-like protrusions and produced clusters of stigmatic tissue (H, arrowhead). Arrowhead in F indicates the adaxially formed style cells. Scale bar: 100 µm.