Figure 4.

Flower architecture in bsl2 bsl3 double mutants. A, Col-0, bsl2-1 bsl3-1, and bsl2-2 bsl3-1 cleared mature flowers. Bar = 500 µm. B, Scanning electron microscopy of a bsl2-1 bsl3-1 mature flower showing two stamens fused along their filaments. Bar = 500 µm. C, Scanning electron microscopy of a bsl2-2 bsl3-1 mature flower with no developed carpels. Bar = 500 µm. D and E, Scanning electron microscopy of Col-0 (D) and bsl2-1 bsl3-1 (E) flower buds. Bars = 500 µm for the wild type and 200 µm for the mutant. F, A gynophore-like structure subtends the ovary in a bsl2-2 bsl3-1 mutant. Dots mark the insertion of sepals and petals, and the asterisk indicates the seat of the gynoecium. Bar = 500 µm. G and H, Cross sections of Col-0 (G) and bsl2-1 bsl3-1 (H) ovaries. Bar = 250 µm. [See online article for color version of this figure.]