Figure 2.

Phenotypes of M. truncatula sgl1 mutants. Three-week-old wild-type M. truncatula (ecotype R108; A) and sgl1-1 mutant (B) exhibited compound and simple leaf forms, respectively. C, Close-up views of adult leaves of wild type R108 (left) and sgl1-1 mutant (right). In S2 and S4 (D), S3 and S5 (E), and S4 and S6 (F) leaf primordia of sgl1-1 mutant, lateral leaflet primordia did not form at the proximal end of common leaf primordia. G, Morphology of a mature sgl1-1 mutant plant, exhibiting simple leaf and floral homeotic phenotypes. H, Petiole length was significantly reduced in sgl1-1 mutant plants compared to the wild-type R108 plants, but no significant differences in petiole length were found in newly developed leaves of wild-type and sgl1-1 mutant (node 10). SL, Single leaflet; ST, stipule. Scale bars, 10 mm (A–C); 50 μm; or 100 μm as indicated (D–F). [See online article for color version of this figure.]