Fig. 1. bri1 is an enhancer of the autonomous mutant ld. (A,B) Flowering time under long days (16 hours light/8 hours darkness) of the wild-type control (Ws), the ld-3 single mutant and the two double bri1 ld mutants isolated in the enhancer screen of ld-3, measured as (A) days to flower or (B) rosette leaf number at bolting. (C) Schematic representation of the effect of the bri1-201 and bri1-202 mutations at the gene and protein level. (D) Flowering time of various bri1 ld double-mutant combinations under long days. A representative experiment is shown. Flowering time was measured as the total number of rosette leaves formed when the bolt was approximately 1 cm. The leaf number values are averages from 10-18 plants per genotype. Error bars represent s.e.m. (E) Photographs at bolting of bri1 ld double mutants compared with Ws and the single mutants ld-2 and ld-3. Scale bar: 1 cm.