Fig. 6. Gynoecium development in wild type and jag nub mutants. (A-H) SEM images of gynoecia from stage 7 (A,B), stage 10 (C,D), stage 11 (E,F) and stage 12 (G,H) flowers from wild type (A,C,E,G) and jag nub mutants (B,D,F,H). Defects in valve growth in jag nub mutants are initially observed as small notches in the gynoecial cylinder (B, white arrowhead). Later, as the gynoecium grows apically, the notches widen and elongate, leading to the exposure of the normally internal ovules (D,F,H). an, anther; gy, gynoecium; r, replum; st, style. Scale bars: 50 µm for A,B; 100 µm for C,D; 200 µm for E-H.