CRL1- dependent auxin-responsive genes expression profiles . Time course of transcription of selected genes in response to IAA treatment (0, 1, 3 or 6 hours) in WT and crl1 mutant stem bases assayed by RT-qPCR. Y-axis indicates the relative expression level at each timepoint relative to timepoint "Ø" (before treatment). Value represent the mean obtained from 3 (MAP, GTE4) to 4 (FSM) independent auxin treatment experiments (blue, WT; red, crl1 mutant), bars represent the standard deviation. Mean values obtained at the different timepoints were compared with the corresponding t0 (Ø) mean value. Significant differences were noted with an asterisk (p-value < 0.1) or two asterisks (p-value < 0.05). Mean values were compared between WT and crl1 mutant for each time point. A significant difference was noted with one (p-value < 0.1) or two plus signs (p-value < 0.05).