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. Interacts with HDG2, and possibly with HDG3, HDG7, ANL2, ATML1 and PDF2. Expressed in roots, seedlings, inflorescence, and siliques. Also detected at low levels in leaves. Confined to the central region of inflorescence ane floral meristems, progressively restricted to the innermost cells of the dome. Also detected in developing stamen locules and later in sporogonous cells within locules. In carpel primordia, found in placenta and in young ovule primordia. Belongs to the AP2/ERF transcription factor family. AP2 subfamily.