Relative expression level of the main genes for auxin metabolism in different developmental stages, organs, and tissues from Arabidopsis. Data was retrieved from Genevestigator (genevestigator.com; Hruz et al. 2008) using datasets from (A) RNA-seq experiments, and (B) Affymetrix Arabidopsis ATH1 Genome Array. Results are expressed in percentage of expression potential (the maximum expression a gene reaches across all experiments). GH3.2 and GH3.4 share array probes in the results shown in B. AGI codes: YUC1 (At4G32540), YUC2 (At4G13260), YUC3 (At1G04610), YUC4 (At5G11320), YUC5 (At5G43890), YUC6 (At5G25620), YUC7 (At2G33230), YUC8 (At4G28720), YUC9 (At1G04180), YUC10 (At1G48910), YUC11 (At1G21430), TAA1 (At1G70560), TAR1 (At1G23320), TAR2 (At4G24670), CYP79B2 (At4G39950), CYP79B3 (At2G22330), DAO1 (At1G14130), DAO2 (At1G14120), GH3.1 (At2G14960), GH3.2 (At4G37390), GH3.3 (At2G23170), GH3.4 (At1G59500), GH3.5 (At4G27260), GH3.6 (At5G54510), GH3.9 (At2G47750), and GH3.17 (At1G28130).