Probably acts as a transcriptional activator. May be involved in the regulation of gene expression by stress factors and by components of stress signal transduction pathways (By similarity). Involved in the control of cell division patterns during the early lateral root primordium development. Acts downstream of auxin signaling (PubMed:17630277). Regulated by ARF7 and ARF19 in response to auxin. Co-acts with LBD16 and LBD18 to control lateral root development (PubMed:23749813). Involved in the determination of floral meristem identity and suppression of bract growth. Required for proper conversion of secondary inflorescences to flowers. Acts together with NPR5/BOP2 and NPR6/BOP1 to promote expression of LFY and AP1, two central regulators of floral meristem identity (PubMed:19482972). Expressed in the early stages of lateral root primordia formation (PubMed:17630277). Expressed in early floral meristem (stage 1 to 2) (PubMed:19482972). By auxin. Disturbed cell division patterns in lateral root primordia leading to the expansion of the proximal region of lateral roots. Short lateral roots in young seedlings (PubMed:17630277). In the shoot, formation of small pin-shaped protrusions at the base of pedicels (PubMed:17630277, PubMed:19482972). Belongs to the AP2/ERF transcription factor family. ERF subfamily.