摘要
番茄植株受伤诱导的蛋白酶抑制剂(PIs)为研究诱导抗性提供了模型体系,该模型体系可以说明调控系统防御反应信号传导的各种途径。在细胞间,受伤诱导PIs表达的是多肽系统素和氧脂衍生的植物激素茉莉酸,系统素和茉莉酸在同一信号途径中协同作用激活了PIs和其他相关防御基因的表达。
Wound-inducible proteinase inhibitors (PIs) in tomato plants provide a useful model system to elucidate the signal transduction pathways that regulate systemic defense response. Among the proposed intercellular signals for wound-induced PIs expression are the peptide systemin and the oxylipin-derived phytohormone jasmonic acid (JA). 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, genetic approach provided new evidence that jasmonic acid. Rather than systemin, functions as the systemic wound signal, and that the biosynthesis of JA is regulated by the peptide systemin.
出处
《东北农业大学学报》
CAS
CSCD
2005年第1期23-27,共5页
Journal of Northeast Agricultural University
基金
黑龙江省博士后资助经费资助(LRB04-195)
关键词
茉莉酸
系统素
局部反应
系统反应
蛋白酶抑制剂
jasmonic acid
systemin
local response
systemic response
proteinase inhibitors.
