Regulates gene expression patterns in meristems and thus modulates organ development. Required for correct embryo patterning and cotyledon organogenesis. Modulates auxin signaling pathway in early embryos. Involved in the cytokinin signaling pathway that promotes shoot regeneration. 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). Interacts with class 3 HD-ZIP proteins such as ATHB-8, CNA, PHB, PHV, and REV. Expressed in shoot apical and floral meristems, and in organ primordia. Transient expression during shoot regeneration. First observed in the embryo at four-cell stage. At the globular stage, localized in cotyledons primordia. Later confined to embryonic cotyledons tips. Expressed from embryogenesis onward in the central zone of the shoot apical and floral meristems, in organ anlagen, and (transiently) in the distal domains of organ primordia. By cytokinins. 'Dornroeschen' means 'Sleeping beauty' in German. Belongs to the AP2/ERF transcription factor family. ERF subfamily.