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). Involved in the regulation of floral organs size (PubMed:15988559). Expressed in roots, seedlings, inflorescence, and siliques. Also detected at low levels in leaves. Present in inflorescence meristem and later in young floral mersitems. Expressed in sepal, petal, stamen and carpel primordia. In petal, progressively confined to petal margin and epidermal cells. Restricted to sporogenous tissue in the stamen and to the medial ridge of the carpel. Present in tissues that develop from this ridge, such as placenta and ovule primordia. In ovules, first expressed in distal part of the funiculus and the outer integument, before being confined to the funiculus. Belongs to the AP2/ERF transcription factor family. AP2 subfamily.