Figure 3.

Induction of the Auxin-Responsive Reporter IAA2_pro:GUS by Ethylene Is Dependent on EIN2 and AUX1.

The expression of the IAA2_pro:GUS reporter was monitored in the wild type ([A] and [F]), in the constitutive ethylene response mutant ctr1 ([B] and [G]), in the ethylene-insensitive mutant ein2 ([C] and [H]), in the auxin influx carrier null allele aux1-22 ([D] and [I]), and in the partial loss-of-function allele aux1-2 ([E] and [J]). Seedlings were either grown in air ([A] to [E]) or in the presence of 10 μL/L of ethylene ([F] to [J]).