乙烯在植物中的信号转导  

The ethylene gas signal transduction pathway in plants

作　　者：潘延云[1] 郭毅[1] 赵军峰[1] 孙大业[1] 

机构地区：[1]河北师范大学分子细胞生物学研究室

出　　处：《浙江大学学报（农业与生命科学版）》2003年第4期453-460,共8页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家重点基础研究发展规划资助项目(G1999011702).

摘　　要：乙烯是所有植物激素中结构最简单的一种,它对植物的代谢调节可贯串其整个生活周期.作为信号物质,它的生物合成主要由ACC合成酶和ACC氧化酶调控.通过对拟南芥中一系列乙烯反应的突变体的分析,人们掌握了很多在乙烯信号转导中发挥作用的生化组分.乙烯受体与细菌的双组分调节系统结构相似,乙烯与之结合后,调节与Raf激酶极为相似的CTR1,进而将信号传递给下游的EIN2.EIN3是一个转录因子,可结合到与乙烯反应相关的基因的启动子的特殊序列上,激活这些基因并使其转录,从而使植株出现与乙烯反应相关的诸多表型特征.Ethylene induces diverse effects in plants throughout their lifecycle. Ethylene is synthesized from SadenosylLmethionine via 1aminocyclopropane1carboxylic acid (ACC). The enzymes catalyzing the two reaction in this pathway are ACC synthase and ACC oxidase. Components of the ethylene signal transduction pathway have been identified by characterization of ethyleneresponse mutants in Arabidopsis thaliana. Ethylene binding to receptors with homology to twocomponent regulators triggers a kinase cascade that is propagated through the CTR1 Faflike kinase and other components to the nucleus. EIN3 is a putative transcription factor involved in regulating expression of ethyleneresponsive genes, then eliciting a response appropriate to the original stimulus.

关 键 词：乙烯 信号转导 植物激素 生物合成 ACC合成酶 ACC氧化酶 受体 

分 类 号：Q946.885.7[生物学—植物学]