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首页> 外文期刊>Journal of Experimental Botany >Taking the very first steps: from polarity to axial domains in the early Arabidopsis embryo
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Taking the very first steps: from polarity to axial domains in the early Arabidopsis embryo

机译：迈出第一步：从极性到拟南芥早期胚胎的轴向域

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摘要

Arabidopsis embryos follow a predictable sequence of cell divisions, facilitating a genetic analysis of their early development. Both asymmetric divisions and cell-to-cell communication are probably involved in generating specific gene expression domains along the main axis within the first few division cycles. The function of these domains is not always understood, but recent work suggests that they may serve as a basis for organizing polar auxin flux. Auxin acts as systemic signal throughout the life cycle and, in the embryo, has been demonstrated to direct formation of the main axis and root initiation at the globular stage. At about the same time, root versus shoot fates are imposed on the incipient meristems by the expression of antagonistic regulators at opposite poles of the embryo. Some of the key features of the embryonic patterning process have emerged over the past few years and may provide the elements of a coherent conceptual framework.
机译：拟南芥胚胎遵循可预测的细胞分裂序列，有助于对其早期发育进行遗传分析。在最初的几个分裂周期内，不对称分裂和细胞间通讯都可能涉及沿主轴生成特定的基因表达域。这些域的功能并不总是被理解，但是最近的工作表明它们可以作为组织极性植物生长素通量的基础。生长素在整个生命周期中均充当系统信号，在胚胎中，生长素已被证明可在球形阶段指导主轴的形成和根部的起始。大约在同一时间，通过在胚胎的相反两极表达拮抗性调节剂，在初生分生组织上施加根与芽的命运。胚胎构图过程的一些关键特征在过去几年中已经出现，并可能提供一个连贯的概念框架的要素。

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