Figure 2.

Ethylene and auxin are involved in the regulation of AtPRP3 expression in the primary root. Transgenic AtPRP3/GUS seedlings were grown for 3 d and then transplanted onto medium containing no effectors (a), 5 μm ACC (b), 25 nm α-NAA (c), 20 μm AVG (d), 20 μm AVG + 80 μm ACC (e), or 20 μm AVG + 100 nm α-NAA (f). Seedlings were grown for an additional 2 d before being stained for GUS activity.