Fig. 6. LMI1 expression in sectioned apices based on reporter fusion. (A-H,K,L) Dark-field and (I,J) bright-field images of 8 µm sections of wild-type plants (A-I,K) and lfy-1 null mutants (J,L), showing ß-glucuronidase (GUS) reporter activity controlled by LMI1 regulatory regions. Seedling stages assayed were vegetative (A), bolting (B), first flower primordium formed (C) and reproductive (D-G,I-L). A stage 10 flower is shown in H. se, sepal; pe, petal; st, stamen; F, flower; I, secondary inflorescence. Arrows point to staining in floral organs; arrowheads highlight staining in the abaxial side of young flowers. All sections were longitudinal. except for E. Scale bar: 100 µm.