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Transcriptional, post-transcriptional and post-translational regulations of gene expression during leaf polarity formation

机译：叶片极性形成过程中基因表达的转录，转录后和翻译后调控

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摘要

Leaf morphogenesis requires the establishment of adaxial-abaxial polarity after primordium initiation from the shoot apical meristem (SAM). Several families of transcription factors are known to play critical roles in promoting adaxial or abaxial leaf fate. Recently, post-transcriptional gene silencing pathways have been shown to regulate the establishment of leaf polarity, providing novel and exciting insights into leaf development. For example, microRNAs (miR165/166) and a trans-acting siRNA (TAS3-derived tasiR-ARF) have been shown to repress the expression of several key transcription factor genes. In addition, yet another level of regulation, post-translational regulation, has been revealed recently by studies on the role of the 26S proteasome in leaf polarity. Although our understanding regarding the molecular mechanisms underlying establishment of adaxial-abaxial polarity has greatly improved, there is still much that remains elusive. This review aims to discuss recent progress, as well as the remaining questions, regarding the molecular mechanisms underlying leaf polarity formation.
机译：叶片形态发生需要从芽顶分生组织（SAM）引发原基形成后，建立左右轴极性。已知几个转录因子家族在促进正面或背面叶命运中起关键作用。最近，转录后基因沉默途径已显示出调节叶片极性的建立，为叶片发育提供了新颖而令人兴奋的见解。例如，已显示microRNA（miR165 / 166）和反式siRNA（TAS3衍生的tasiR-ARF）可以抑制几种关键转录因子基因的表达。另外，最近关于26S蛋白酶体在叶片极性中的作用的研究揭示了另一水平的调节，即翻译后调节。尽管我们对建立前后轴极性的分子机制的理解已大大改善，但仍有许多事情难以捉摸。这篇综述旨在讨论有关叶极性形成的分子机制的最新进展以及其余问题。

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  • 来源
    《Cell Research》 |2007年第6期|p.512-519|共8页
  • 作者

    Lin Xu; Li Yang; Hai Huang;

  • 作者单位

    National Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 细胞生物学;
  • 关键词

    arabidopsis; leaf development; polarity formation;

    机译：拟南芥;叶片发育;极性形成;

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