Barkoulas Michalis, Galinha Carla, Grigg Stephen P, Tsiantis Miltos
Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK.
Curr Opin Plant Biol. 2007 Dec;10(6):660-6. doi: 10.1016/j.pbi.2007.07.012. Epub 2007 Sep 14.
In the past two years novel connections were described between auxin function and transcription factor patterning systems involved in both leaf initiation and elaboration of leaf axial patterning. A cascade of small RNA-based regulatory steps was suggested to facilitate delimitation of cell types comprising the upper versus lower parts of the leaf. Developmental regulation of cellular growth emerged as a crucial component in regulation of leaf form with TCP and CUC2 transcription factors playing a key role in this process. Finally, cis-regulatory evolution of developmental genes emerged as a process that likely contributed to diversification of leaf form, while studies in seedless land plants have begun to elucidate the ancestral and derived aspects of leaf development pathways.
在过去两年中，人们描述了生长素功能与参与叶片起始和叶片轴向模式形成的转录因子模式系统之间的新联系。有人提出了一系列基于小RNA的调控步骤，以促进对构成叶片上部和下部的细胞类型进行界定。细胞生长的发育调控成为叶片形态调控的关键组成部分，TCP和CUC2转录因子在此过程中发挥关键作用。最后，发育基因的顺式调控进化成为一个可能导致叶片形态多样化的过程，而对无籽陆地植物的研究已开始阐明叶片发育途径的祖先和衍生方面。
