Figure 7.
ech2 ibr10 Displays Decreased Auxin Reporter Activity in Response to Active Auxins.
(A) Seven-day-old light-grown wild-type (Wt) and ech2-1 ibr10-1 seedlings carrying DR5-GUS were transferred to medium supplemented with ethanol (mock) or the indicated auxin and were incubated for 2 h at 22°C prior to staining for GUS activity for 1.5 h. Bar = 100 μm.
(B) Mean GUS activity (±se; n = 16) of 7-d-old light-grown wild-type and ech2-1 ibr10-1 seedlings carrying DR5-GUS treated for 2 h with ethanol (mock treatment; 0 μM auxin) or the indicated auxin.
(C) Mean root lengths (±se; n = 13) of 8-d-old light-grown wild-type and ech2-1 ibr1-2 ibr3-1 ibr10-1 seedlings grown on medium supplemented with ethanol (mock treatment; 0 nM IAA) or various concentrations of IAA.