Transcription activator that binds to as1-like elements (5'-TGACGTAAgggaTGACGCA-3') in promoters of target genes. Regulates transcription in response to plant signaling molecules salicylic acid (SA), methyl jasmonate (MJ) and auxin (2,4D) only in leaves. Prevents lateral branching and may repress defense signaling. Binds DNA as a dimer (By similarity). Interacts with TGA2.2 (PubMed:12777042). Specifically expressed in roots. Belongs to the bZIP family.