Flowers into shoots: Photo and hormonal control of a meristem identity switch in Arabidopsis
Flowers into shoots: Photo and hormonal control of a meristem identity switch in Arabidopsis
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DOI：
10.1073/pnas.93.24.13831
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发表时间：
1996-11-26
影响因子：
11.1
通讯作者：
Jofuku, KD
中科院分区：
文献类型：
--
作者：
Okamuro, JK;denBoer, BGW;Jofuku, KD
关于控制分生组织和器官身份基因网络的信号知之甚少，这些基因控制着花的发育。在拟南芥中，我们可以诱导一个异时开关从花到芽的发展，一个过程称为花分生组织逆转，通过操纵光周期在花的同源异型突变体agamous和杂合的分生组织身份基因多叶的植物。从花到茎分生组织的转化被hy1（一种阻断光敏色素活性的突变）、spindly（一种以激素非依赖方式激活基础赤霉素信号转导的突变）或赤霉素的外源应用所抑制。我们认为LFY和AG在维持花分生组织的特性中起着重要作用，并且杂合LFY和AG花的分生组织逆转受光敏色素和赤霉素信号转导级联的调节。
Little is known about the signals that govern the network of meristem and organ identity genes that control flower development. In Arabidopsis, we can induce a heterochronic switch from flower to shoot development, a process known as floral meristem reversion, by manipulating photoperiod in the floral homeotic mutant agamous and in plants heterozygous for the meristem identity gene leafy. The transformation from flower to shoot meristem is suppressed by hy1, a mutation blocking phytochrome activity, by spindly, a mutation that activates basal gibberellin signal transduction in a hormone independent manner, or by the exogenous application of gibberellins. We propose that LFY and AG play an important role in the maintenance of flower meristem identity and that floral meristem reversion in heterozygous lfy and in ag flowers is regulated by a phytochrome and gibberellin signal transduction cascade.