Advances on Wound Signaling Pathway and Induced Resistance in Tomato

wound-causing activate mechanisms directed to healing and further defenses in tomato plant. Responses to mechanical damage involving the generation, translocation, perception, and transduction of wound signal to activate the expression of wound inducible genes. Jasmonic acid has been acted as the center role in plant reponses to wounding, other compounds, including the systemin, oligosaccharides, and oligogalacturonides have also played a role in wound signaling. Wound-inducible proteinase inhibitors ( PIs ) in tomato provide a useful model system to elucidate the signal transduction pathways that regulate system defense response. Among the proposed intercellular signal for wound -induced PIs expression are the peptide systemin and phytohormone jasmonic acid ( JA ). A increasing body of evidence indicates that systemin and JA work in the same signal pathway to activate the expression of PIs and other defense related genes.