GUS activity (MU min−1 seedling−1) in transgenic Arabidopsis.

*Activity in the whole seedling calculated by adding activity in the root and shoot.Fluorometric determination of GUS activity using MUG as enzyme substrate and extracts from transgenic AtGH9C1::GUS. The activity values represent the slope of the regression of MU produced versus time of incubation for each treatment using the indicated tissue extract (±SE, N = 5). Treatments included light and dark germination and media supplemented with increasing concentrations of ACC (1-aminocyclopropane-1-carboxylate), or with AVG (Aminoethoxyvinylglycine) or with both ACC and AVG.