An ideal leaf shape is beneficial to the yield of rice. Molecular understanding of the leaf primordia and polarity establishment plays a significant role in exploring the genetic regulatory network of leaf morphogenesis. In recent years, researchers have cloned an array of coding genes and a few non-coding small RNAs involved in rice leaf development through regulating the development of leaf primordia, vascular bundles, sclerenchyma cells, bulliform cells, cell walls and epidermis cells. These genes and their interactions play critical roles in rice leaf development through the determination and regulatory role in gene expression, and their coordination with other genetic networks or signal pathways. But the relationship among these genes is poorly defined and the underlying network is still unclear. In this review, we introduced the regulatory pathways of leaf primordium development and leaf polarity establishment, mainly the relationship between cell development mechanism and leaf polarity establishment, focusing on how leaf tissue affects leaf shape. Hopefully, the regulation network reviewed here has immediate implications for future research and genomic design breeding.

理想的叶片形状有利于水稻的产量。对叶片原基和极性建立的分子理解在探索叶片形态发生的遗传调控网络中起着重要作用。近年来，研究人员已经通过调控叶片原基，血管束，硬化细胞，牛状细胞，细胞壁和表皮细胞的发育，克隆了一系列与水稻叶片发育有关的编码基因和一些非编码小RNA。这些基因及其相互作用通过在基因表达中的确定和调节作用以及它们与其他遗传网络或信号途径的协调作用，在水稻叶片发育中起关键作用。但是这些基因之间的关系定义不清，底层网络仍然不清楚。在这篇评论中 我们介绍了叶片原基发育和叶片极性建立的调控途径，主要是细胞发育机制与叶片极性建立之间的关系，重点是叶片组织如何影响叶片形状。希望这里审查的调控网络对未来的研究和基因组设计育种具有直接的意义。