穗的外露(穗颈长度)对水稻的产量有重要影响.穗颈过短,会造成包颈穗,影响水稻的结实率;穗颈过长,容易造成倒伏或穗颈折断,从而影响水稻的生产和产量.赤霉素(gibberellin,GA)在植物茎的伸长调控中起着重要作用.本研究对水稻赤霉素类受体...穗的外露(穗颈长度)对水稻的产量有重要影响.穗颈过短,会造成包颈穗,影响水稻的结实率;穗颈过长,容易造成倒伏或穗颈折断,从而影响水稻的生产和产量.赤霉素(gibberellin,GA)在植物茎的伸长调控中起着重要作用.本研究对水稻赤霉素类受体家族基因OsGRL1(Gibberellin receptor like 1)的功能进行了探究,发现该基因在水稻穗颈长度和产量性状方面具有重要的调控作用.表达分析表明,OsGRL1在茎、叶鞘及茎顶端组织中高表达,不受外源GA的诱导.亚细胞定位分析表明,与已知的水稻GA受体蛋白OsGID1定位于细胞核中不同,OsGRL1蛋白定位在细胞膜上,且不随外源GA的诱导而改变.与野生型相比,OsGRL1敲除突变体表现出穗颈伸长、籽粒变小和千粒重降低的表型,而过表达转基因株系穗颈缩短、籽粒变大且千粒重增加.进一步研究发现,OsGRL1基因突变使GA信号转导通路中抑制基因SLR1的表达下调,提高了突变体对GA敏感性.因此,OsGRL1通过调控GA信号转导通路基因的表达而调节水稻穗颈伸长和产量,在育种中具有潜在的应用价值.展开更多
The hormone gibberellin(GA) plays an important role in modulating diverse processes throughout plant development.Gibberellin(GA) perception is mediated by GID1(GA-INSENSITIVE DWARF1),a receptor that shows similarity t...The hormone gibberellin(GA) plays an important role in modulating diverse processes throughout plant development.Gibberellin(GA) perception is mediated by GID1(GA-INSENSITIVE DWARF1),a receptor that shows similarity to hormone-sensitive lipases.It has been postulated that plants have two types of GA receptors,including soluble and membrane-bound forms.In recent years,significant advances have been made in the research of Gibberellin Receptor(GID1).This article highlights recent advances in the molecular structure of Gibberellin Receptor(GID1),Molecular Interactions between the Gibberellin Receptor(GID1) with DELLA,Cloning and expression of GA receptors(GID1),function identification of GA receptor gene(GID1).These discoveries open new prospects for the understanding mechanism of GA receptors(GID1) in plants.展开更多
文摘穗的外露(穗颈长度)对水稻的产量有重要影响.穗颈过短,会造成包颈穗,影响水稻的结实率;穗颈过长,容易造成倒伏或穗颈折断,从而影响水稻的生产和产量.赤霉素(gibberellin,GA)在植物茎的伸长调控中起着重要作用.本研究对水稻赤霉素类受体家族基因OsGRL1(Gibberellin receptor like 1)的功能进行了探究,发现该基因在水稻穗颈长度和产量性状方面具有重要的调控作用.表达分析表明,OsGRL1在茎、叶鞘及茎顶端组织中高表达,不受外源GA的诱导.亚细胞定位分析表明,与已知的水稻GA受体蛋白OsGID1定位于细胞核中不同,OsGRL1蛋白定位在细胞膜上,且不随外源GA的诱导而改变.与野生型相比,OsGRL1敲除突变体表现出穗颈伸长、籽粒变小和千粒重降低的表型,而过表达转基因株系穗颈缩短、籽粒变大且千粒重增加.进一步研究发现,OsGRL1基因突变使GA信号转导通路中抑制基因SLR1的表达下调,提高了突变体对GA敏感性.因此,OsGRL1通过调控GA信号转导通路基因的表达而调节水稻穗颈伸长和产量,在育种中具有潜在的应用价值.
基金Supported by Natural Science Foundation of China(31360312)Guangxi Natural Science Foundation(2015GXNSFDA39011)+6 种基金National High Technology Research and Development Program("863"Program)of China(2013AA102604)National Key Technology R&D Program(2012BAD40B04-3)Guangxi Natural Science Foundation(2014GXNSFBA118087)International Scientific Cooperation Program of China(2013DFA31600)Guangxi Special Fund for Bagui Scholars(2013)Guangxi Academy of Agricultural Sciences project(2014YP03,2014YD02,2015YM13,2015YT03)Guangxi Academy of Agricultural Sciences Project(2014YP03,2014YD02,2015YM13,2015YT03)
文摘The hormone gibberellin(GA) plays an important role in modulating diverse processes throughout plant development.Gibberellin(GA) perception is mediated by GID1(GA-INSENSITIVE DWARF1),a receptor that shows similarity to hormone-sensitive lipases.It has been postulated that plants have two types of GA receptors,including soluble and membrane-bound forms.In recent years,significant advances have been made in the research of Gibberellin Receptor(GID1).This article highlights recent advances in the molecular structure of Gibberellin Receptor(GID1),Molecular Interactions between the Gibberellin Receptor(GID1) with DELLA,Cloning and expression of GA receptors(GID1),function identification of GA receptor gene(GID1).These discoveries open new prospects for the understanding mechanism of GA receptors(GID1) in plants.
