赤霉素信号转导及其调控植物生长发育的研究进展

Research Progress for the Gibberellin Signaling and Action on Plant Growth and Development

赤霉素(Gibberellins或gibberellic acid,GA)是植物生长发育所必需的植物激素之一,调控植物生长发育的多个过程。近年来随着植物分子生物学和功能基因组学的发展,有关GA信号转导途径及其调控植物生长发育的研究取得了一系列的进展。综述了GA信号转导途径的关键组分,包括GA受体GIBBERELLIN INSENSITIVE DWARF1(GID1)蛋白、F-box蛋白(拟南芥中的SLEEPY1[SLY1]和水稻中的GIBBERELLIN INSENSITIVE DWARF2[GID2])及DELLA蛋白,阐述了GA去除DELLA蛋白阻遏作用的分子模型,同时探讨DELLA蛋白通过其互作蛋白整合其它激素及环境信号调控植物生长发育的作用机理。

Gibberellins（GAs）are the important plant hormones and play an important role in modulating diverse processes throughoutplant growth and development. Recent studies on GA signaling and the crosstalk between GA and other plant hormones and environmental cueshave achieved great progress along with the advancement of molecular genetics and functional genomics. Bioactive GAs promote plant growthand development by pro moting the degradation of the DELLA proteins,a family of nuclear growth repressors. In this article,we review thekey components of GA signaling pathway,including the soluble receptor protein GIBBERELLIN INSENSITIVE DWARF1（GID1）,theF-box protein（SLEEPY1[SLY1]in Arabidopsis and GIBBERELLIN INSENSITIVE DWARF2[GID2]in rice）and the DELLA proteins,to demonstrate the GA＇s ＂de-repression＂ model,we also focus on DELLA proteins function which is connected to developmental andenvironmental responses.