高等植物赤霉素生物合成关键组分 GA20-oxidase 氧化酶基因的研究进展

摘要

GA-20氧化酶（GA-20 oxidase）是重要的 GA 生物合成和调控酶，直接催化生成有生物活性的 GAs，是一种多功能酶，最显著的特点就是负反馈调节。GA20-氧化酶在植物发育和生理过程中起着重要的调控作用。综述了高等植物体内 GA20氧化酶基因的克隆及表达调控研究及其对株高、纤维、开花、产量性状等影响，重点阐述了 GA20氧化酶基因与激素、光周期、抗性等之间的相互作用，以便更好地揭示 GA-20氧化酶信号网络系统及其作用机制。%GA20-oxidase,as a key synthetizing and regulating enzyme in the biosynthesis of gibberellic acid,directly regulates the generation of biological GAs. It is also a multifunctional enzyme,and its most important feature is negative feedback regulation. GA20-oxidase plays an important regulating role in the development and physiological processes of plants. This article summarizes the recent studies on the molecular cloning and regulating expression analysis of GA20-oxidase genes and their effects on plant height,fiber formation,flowering,yield traits,etc.,and explains the interactions of GA20-oxidase gene with hormones,photoperiod,stress resistance and other factors,aiming at revealing the signal network system and its mechanism of GA20-oxidase.