Transcription factor. Interacts specifically with the W box (5'-(T)TGAC[CT]-3'), a frequently occurring elicitor-responsive cis-acting element. Positively modulates defense-related gene expression and disease resistance. A number of isoforms are produced. According to EST sequences. By salicylic acid and pathogens. Constitutive expression at high level causes severe abnormality in plant growth. Belongs to the WRKY group II-a family.