番茄受伤信号传导及诱导抗性的研究进展

番茄植株机械受伤后激活了受伤愈合和防御的各种机制,引发了受伤信号的产生、运转、感知接受和转导等以激活受伤诱导基因的表达。茉莉酸(Jasmonicacid,JA)在番茄对机械受伤反应中起中心作用,其他化合物,包括系统素、寡糖和寡聚半乳糖醛酸等也在受伤信号中起重要作用。番茄植株受伤诱导的蛋白酶抑制剂为研究诱导抗性提供了一个有用的模型体系,说明调控系统防御反应信号传导的各种途径,提出了细胞间受伤诱导蛋白酶抑制剂PIs表达的是多肽系统素(polypeptidesystemin)和植物激素茉莉酸。越来越多的证据指明:系统素和JA在同一信号途径中协同作用激活了PIs和其他防御相关基因的表达。

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.