Fig. 1. Phenotypes of jag-1 mutants. (A) Wild-type rosette leaf. (B) jag-1 rosette leaf. (C) Wild-type flower. (D) jag-1 flower. The sepals are shorter and narrower than those of wild type and the petals are short and narrow and do not reflect as much light as the white wild-type petals. (E) Close-up of wild-type sepal indicates small white region at the tip. (F) jag-1 sepal. Note jagged white tissue at tip (marked by a bracket). (G) Close-up of wild-type petal. (H) Three examples of jag-1 petals. Note that the distal white region (bracket) is reduced or absent in jag-1. (I,J) Scanning electron microscopy (SEM) of anthers. (I) Wild-type. (J) jag-1. Anthers are shorter and are spade shaped. (K-P) SEMs of petal tips. (K,N) Adaxial side of wild-type petal epidermis. The cells are uniformly conical with cuticular ridges. (L,O) jag-1 petal cells are not as uniform and have elongated cells interspersed, which have irregular cuticular ridges. These cells resemble epidermal cells near the base of wild-type petals, shown in M,P. Scale bars: 50 µm (I,J), 20 µm (K-M) and 4 µm (N-P).