Cell division-promoting factor involved in leaf blade differentiation, inflorescence branching, as well as in carpel and silique shape. Promotes the number of xylem cells. Regulates positively the gibberellin signaling pathway leading to germination, hypocotyl elongation, and leaf expansion. Probably acts as a transcriptional activator. Binds to the GCC-box pathogenesis-related promoter element. May be involved in the regulation of gene expression by stress factors and by components of stress signal transduction pathways (By similarity). Expressed in germinating seeds. Present in young shoots, at low levels, especially in leaf primordia and developing leaf blades. Also detected in vascular tissue, mostly in xylem, of young leaves, petioles and hypocotyls. By imbibition. Belongs to the AP2/ERF transcription factor family. ERF subfamily.