Transcription factor playing a pivotal role in the control of morphogenesis of shoot organs by negatively regulating the expression of boundary-specific genes such as CUC genes, probably through the induction of miRNA (e.g. miR164) (PubMed:12931144, PubMed:17307931). Required during early steps of embryogenesis (PubMed:15634699). Participates in ovule develpment (PubMed:25378179). Activates LOX2 expression by binding to the 5'-GGACCA-3' motif found in its promoter (PubMed:18816164, PubMed:12931144, PubMed:15634699, PubMed:17307931, PubMed:25378179). Activates YUC5 transcription by binding to the 5'-GTGGGCCA-3' motif found in its promoter (PubMed:27597774). Through the activation of YUC5 transcription, integrates the auxin response to a brassinosteroid-dependent molecular circuit that promotes cell elongation in hypocotyls (PubMed:27597774). Activates GIS transcription by binding to the 5'-TGGTCC-3' motif found in its promoter (PubMed:29165850). Involved in the regulation of trichome branching through the activation of GIS transcription (PubMed:29165850). Activates CO transcription by binding to the 5'-GGACCAC-3' motif found in its promoter (PubMed:28628608). Involved in the regulation of photoperiodic flowering through the activation of CO transcription (PubMed:28628608). Activates TCL1 and TCL2 transcription by binding to the 5'-TGGCCA-3' and 5'-GTGGACCA-3' motifS found in their respective promoters (PubMed:31575625). Involved in the suppression of trichome initiaition through the activation of TCL1 and TCL2 transcription (PubMed:31575625). Activates HAT2 transcription by binding to the 5'-TGGTCCAC-3' motif found in its promoter (PubMed:30742619). Through the activation of HAT2 transcription, involved in the auxin-independent reprogramming of mitotic cells to exit division and acquire differentiation competence within the transition zone (PubMed:30742619). Interacts with AHL27 and AHL29 (PubMed:24218605). Interacts with SPL (PubMed:25527103, PubMed:25378179). Interacts with JGB (PubMed:27468890, PubMed:24218605, PubMed:25378179, PubMed:25527103). Interacts with GI (via N-terminus) (PubMed:28628608). Expressed in cotyledons, particularly in the vascular region, in leaves, roots, buds, flowers and immature siliques. Expressed in cotyledons during embryogenesis. Expressed during ovule development (PubMed:25378179). Repressed by the miRNA miR-JAW/miR319. Truncated N-terminus.