Figure 4.

Late-Flowering Phenotype of Transgenic Arabidopsis Overexpressing EPR1.

(A) Transgenic Arabidopsis plants showing wild-type levels of EPR1 (EPR1 ox-2 and EPR1 ox-8) and increased EPR1 levels (EPR1 ox-19 and EPR1 ox-25) were grown under LD conditions (16 h of light/8 h of dark) for 24 days. Wild-type Columbia (Col) and phyB mutant plants were used as controls. Bar = 1 cm.

(B) Quantitative analysis of flowering time under LD and SD conditions of two EPR1-overexpressing lines (EPR1 ox-19 and EPR1 ox-25). The time of bolting was the day when the plant had a bolt of 1 cm. Wild-type (Col), phyA-211, and phyB-9 were used as controls. The error bars represent standard errors.