Plavskin Y, Timmermans M C P
Watson School of Biological Sciences, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.
Cold Spring Harb Symp Quant Biol. 2012;77:221-33. doi: 10.1101/sqb.2013.77.014878. Epub 2013 Jan 9.
The evolution of plants on land has produced a great diversity of organs, tissues, and cell types. Many of the genes identified as having a role in the development of such structures in flowering plants are conserved across all land plants, including in clades that diverged before the evolution of the structure in question. This suggests that novel organs commonly evolve via the cooption of existing developmental gene regulatory networks (GRNs). Although numerous examples of such cooptions have been identified, little is known about why those specific GRNs have been coopted. In this review, we discuss the properties of GRNs that may favor their cooption, as well as the mechanisms by which this can occur, in the context of plant developmental evolution. We especially focus on small RNA (sRNA)-regulated and auxin-signaling GRNs as intriguing models of regulatory network recruitment.
植物在陆地上的进化产生了种类繁多的器官、组织和细胞类型。许多被确定在开花植物此类结构发育中起作用的基因在所有陆地植物中都是保守的，包括在相关结构进化之前就已分化的分支中。这表明新器官通常是通过现有发育基因调控网络（GRN）的共同选择而进化的。尽管已经发现了许多这种共同选择的例子，但对于为什么选择那些特定的GRN却知之甚少。在这篇综述中，我们在植物发育进化的背景下，讨论了可能有利于其共同选择的GRN特性，以及这种情况发生的机制。我们特别关注小RNA（sRNA）调控的和生长素信号GRN，将其作为调控网络招募的有趣模型。
