Laboratory of Plant Growth Regulation, Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayamacho 8916-5, Ikoma, Nara 630-0192, Japan.
Curr Opin Plant Biol. 2012 Dec;15(6):578-84. doi: 10.1016/j.pbi.2012.08.001. Epub 2012 Aug 22.
During embryogenesis, the basic body plan of an organism develops from a unicellular zygote. In most flowering plants, the polar zygote divides asymmetrically, making visible the apical-basal axis in the early embryo. The molecular mechanisms governing how the zygote polarizes and how this polarity is linked to embryo axis formation have been obscure, mainly owing to the difficulties to access the zygote that is deeply embedded in the maternal tissue. In this review, we summarize recent findings identifying key regulators in Arabidopsis and developing novel approaches in various plant species, which altogether set the stage for unraveling embryo axis formation.
在胚胎发生过程中，生物体的基本身体计划从单细胞合子发育而来。在大多数有花植物中，极性合子不对称分裂，使早期胚胎中的顶端-基底轴可见。控制合子极化的分子机制以及这种极性如何与胚胎轴形成相关联一直不清楚，主要是因为难以接近深埋在母体组织中的合子。在这篇综述中，我们总结了最近在拟南芥中发现的关键调节因子的发现，并在各种植物物种中开发了新的方法，这些方法共同为揭示胚胎轴形成奠定了基础。
