植物中Gibberellin 2-oxidases基因研究进展  

Advances on Gibberellin 2-oxidases Gene in Higher Plants

作　　者：李艳冰 朱美玉[1] 杨晓茹 李悦 赫易 齐明芳[1] 李天来[1] LI Yanbing;ZHU Meiyu;YANG Xiaoru;LI Yue;HE Yi;QI Mingfang;LI Tianlai(College of Horticulture,Shenyang Agricultural University,National ＆ Local Joint Engineering Research Center of Northern Horticultural Facilities Design ＆ Application Technology（Liaoning）,2.Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province,Liaoning 110866,China)

机构地区：[1]沈阳农业大学园艺学院北方园艺设施设计与应用技术国家地方联合工程研究中心(辽宁)设施园艺省部共建教育部重点实验室,沈阳110866

出　　处：《园艺学报》2018年第9期1844-1856,共13页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(U1708232);沈阳市科技计划项目(17-143-3-00;18-013-0-36);辽宁省高校创新团队支持计划项目(LZ2015025)

摘　　要：赤霉素2–氧化酶(Gibberellin 2-oxidases,GA2oxs)是赤霉素代谢过程中的关键酶,根据底物特异性其可分为C20-GA2oxs和C19-GA2oxs两类,其中C20-GA2oxs直接作用于GA合成前体(GA12,GA53),C19-GA2oxs负责分解活性GA(GA1,GA4)及其前体(GA20,GA9)。GA2oxs由多基因编码,参与维持植物生长发育多个过程,受外源环境与内源因素严格而精密调控。研究表明GA2oxs通过调节植物体内赤霉素水平影响植物的生长发育,如株高、种子萌发、开花和结实等。主要综述了GA2oxs基因时空表达模式,生理功能,转录调控等方面的研究进展,为了解其对植物生长发育的调控机制提供参考,同时也有助于在生产实践中更好地利用其开展基因工程研究,定向培育植物新品种。Gibberellin 2-oxidases（GA2 oxs）are a kind of key enzymes in the metabolism of GA. According to the substrate specificity, GA2 oxs can be divided into two types ： C19-GA2 oxs and C20-GA2 oxs,in which C20-GA2 oxs acts on GA synthesis precursors（GA12,GA53）,and C19-GA2 oxs is responsible for metabolizing active GA（GA1,GA4）and precursors（GA20,GA9）. GA2 oxs are encoded by multiple genes,involved in regulating plant growth and development and strictly regulated by environment and endogenous factors. Studies have shown that GA2 oxs affect the growth and development of plants,for example,plant height,seed germination,flowering and fruiting by regulating the gibberellin level. Here,we summarized the research progress in the expression patterns,physiological functions and transcriptional regulation of GA2 oxs,aiming to provide reference for understanding the regulatory mechanisms of GA2 oxs genes on plant growth and development. It is also helpful to make better use of GA2 oxs genes in genetic engineering research for crop improvement.

关 键 词：赤霉素2–氧化酶基因 表达模式 生理功能 环境因素 植物激素 转录因子 

分 类 号：S6[农业科学—园艺学]