Erulus Is a Plasma Membrane-Localized Receptor-Like Kinase That Specifies Root Hair Growth by Maintaining Tip-Focused Cytoplasmic Calcium Oscillations

The study focused on ERULUS, a plasma membrane-localized receptor-like kinase, which was found to be essential for specifying root hair growth by maintaining tip-focused cytoplasmic calcium oscillations. Root hairs, being single-cell projections, significantly increased the root's effective radius, aiding in water and nutrient uptake, particularly under resource-limited conditions. The research highlighted the importance of ERULUS in the regulation of these calcium oscillations, which were crucial for the proper growth and function of root hairs.