Genetic Functions Analysis of the Peptide Systemin and the Oxylipinderived Phytohormone Jasmonic Acid in Signaling Pathway in Lycopersion Esculutum

摘要

The peptide systemin and the oxylipinderived phytohormone jasmonic acid that regulate in signaling pathway in tomato. Wound-inducible proteinase inhibitors (PIs) in tomato provide a useful model system to explain this questions. An increasing body of evidence indicates that systemin and JA work in the same signaling pathway to activate the expression of PIs and other defense related genes. However, little is understood about how these signals interact to promote cell-to-cell communication over long distances. Genetic analysis of the systemin/JA signaling pathway in tomato plants provides a unique opportunity to study, in a single experimental system, the mechanism by which peptide and oxylipin signals interact to coordinate systemic expression of defense-related genes. Previously, it has been proposed that systemin is the long-distance mobile signal for defense gene expression. Recently, A new evidence indicates that jasmonic acid, rather than systemin, functions as the systemic wound signal, and that the biosynthesis of JA is regulated by the peptide systemin.