Reyes-Hernández Blanca Jazmin, Maizel Alexis
Center for Organismal Studies (COS), University of Heidelberg, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany.
Center for Organismal Studies (COS), University of Heidelberg, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany.
Curr Opin Plant Biol. 2023 Dec;76:102479. doi: 10.1016/j.pbi.2023.102479. Epub 2023 Oct 17.
Lateral root (LR) formation in Arabidopsis is a continuous, repetitive, post-embryonic process regulated by a series of coordinated events and tuned by the environment. It shapes the root system, enabling plants to efficiently explore soil resources and adapt to changing environmental conditions. Although the auxin-regulated modules responsible for LR morphogenesis and emergence are well documented, less is known about the initial priming. Priming is characterised by recurring peaks of auxin signalling, which, once memorised, earmark cells to form the new LR. We review the recent experimental and modelling approaches to understand the molecular processes underlying the recurring LR formation. We argue that the intermittent priming of LR results from interweaving the pattern of auxin flow and root growth together with an oscillatory auxin-modulated transcriptional mechanism and illustrate its long-range sugar-mediated tuning by light.
拟南芥侧根（LR）的形成是一个连续、重复的胚后过程，受一系列协调事件调控，并受环境影响。它塑造了根系，使植物能够有效地探索土壤资源并适应不断变化的环境条件。尽管负责侧根形态发生和出现的生长素调节模块已有充分记录，但对于初始引发过程却知之甚少。引发的特征是生长素信号的反复峰值，一旦被记住，就会标记细胞以形成新的侧根。我们回顾了最近用于理解反复形成侧根背后分子过程的实验和建模方法。我们认为，侧根的间歇性引发是生长素流动模式与根生长交织在一起，以及生长素调节的振荡转录机制共同作用的结果，并说明了光通过糖介导的远程调节作用。
