Fig. 2. LFY is required for expression from the AP3 promoter. GUS expression conferred by the 5D4::GUS promoter construct. This construct drives expression in a wild-type background in the presumptive petal and stamen primordia at stage 3 (A) and expression is maintained in this domain in later stages of floral development; expression at stage 8 is shown (B). This pattern of expression is largely abolished in a lfy-6 mutant background, with no detectable GUS expression at stage 3 (C). At stage 8, a limited patch of GUS expression is observed at the base of the developing second and third whorls (D).
