Required for correct embryo patterning and cotyledon organogenesis. May regulate positively the gibberellin signaling pathway leading to germination, hypocotyl elongation, and leaf expansion. Involved in the cytokinin signaling pathway that promotes shoot regeneration, probably through transcriptional activation of target genes such as CUC1. 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. Cotyledons, leaf primordia and shoot apical meristems. First observed in the embryo at globular stage in cotyledons primordia and later confined to cotyledons tips and shoot apical meristem. Also detected in emerging leaf primordia. 'Dornroeschen' means 'Sleeping beauty' in German. Belongs to the AP2/ERF transcription factor family. ERF subfamily.