Ogas J, Cheng J C, Sung Z R, Somerville C
Department of Plant Biology, Carnegie Institution of Washington, 290 Panama Street, Stanford, CA 94305, USA.
Science. 1997 Jul 4;277(5322):91-4. doi: 10.1126/science.277.5322.91.
The plant growth regulator gibberellin (GA) has a profound effect on shoot development and promotes developmental transitions such as flowering. Little is known about any analogous effect GA might have on root development. In a screen for mutants, Arabidopsis plants carrying a mutation designated pickle (pkl) were isolated in which the primary root meristem retained characteristics of embryonic tissue. Expression of this aberrant differentiation state was suppressed by GA. Root tissue from plants carrying the pkl mutation spontaneously regenerated new embryos and plants.
植物生长调节剂赤霉素（GA）对茎的发育有深远影响，并促进诸如开花等发育转变。关于GA可能对根发育产生的任何类似影响，人们了解甚少。在一次突变体筛选中，分离出了携带名为pickle（pkl）突变的拟南芥植株，其中主根分生组织保留了胚胎组织的特征。GA抑制了这种异常分化状态的表达。携带pkl突变的植株的根组织能自发再生出新的胚胎和植株。
