Figure 1.

PAC represses while GA₃ enhances the ethylene-induced hook curvature. (A) The hook phenotype of 3-day-old (top) and 6-day-old (bottom) etiolated wild-type seedlings grown on the indicated medium (1 μM PAC, 10 μM ACC, and/or 10 μM GA₃). The scale bars represent 1 mm. (B) The hook phenotype of 6-day-old etiolated seedlings of EIN3ox grown on the indicated medium (1 μM PAC and/or 10 μM GA₃). (C) The hook phenotype of 3-day-old etiolated seedlings of indicated genotypes grown on MS medium. (D) The hook phenotype of etiolated ethylene-related mutants and transgenic plants grown on MS medium supplemented with or without 1 μM PAC for 3 days.