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The anionic peroxidase genes of tomato, tap1 and tap2, are induced by wounding in tomato fruits and by elicitor treatment in cell suspension cultures. These homologous genes code for anionic peroxidases that are postulated to cause polymerization of the phenolic residues into wall polymers in wound-healing and pathogen-infected tissues. An expression construct containing the entire TAP1 gene with its 5′ and 3′ flanking sequences was introduced into tobacco by Agrobacterium tumefaciens-mediated gene transfer. Also, constructs containing the 5′ upstream regions of tap1 and tap2 including sequences coding for their respective putative leader peptides fused translationally to the β-glucuronidase (GUS) reporter gene were made and introduced into tobacco. Northern blot analysis of transcripts from wound-healing leaf tissues of transformants containing tap1 showed that the introduced gene was …