Auxin Signaling Mediated Spatial Accommodation Mechanisms During Lateral Root Development

Abstract

Spatial accommodation, the ability of plant tissues to adapt structurally during organogenesis, is important for the successful growth and emergence of new organs, such as lateral roots, through overlying cell layers. This process requires precise coordination between cellular architecture and physical as well as biochemical signals. As a key determinant of root system architecture, auxin is also an important regulator of spatial accommodation. Of these responses, the modulation of the cytoskeleton dynamics and cell wall remodeling across multiple tissue layers is of particular importance. Here, we focus on how auxin signaling controls these dynamics to enable tissue-scale plasticity during lateral root emergence. We also compare how these mechanisms vary across plant lineages, highlighting the differences between dicots and monocots, but also non-vascular plants.