Plant elicitor Peptides regulate root hair development in .

Plant Elicitor Peptides (Peps) induce plant immune responses and inhibit root growth through their receptors PEPR1 and PEPR2, two receptor-like kinases. In our study, we found a previously unknown function of Peps that enhance root hair growth in a PEPRs-independent manner. When we characterized the expression patterns of genes, we found several gene promoters of gene family were particularly active in root hairs. Furthermore, we observed that is vital for root hair development, as disruption of gene led to a significant reduction in root hair density and length. We also discovered that regulates root hair formation via the modulation of and expression, thereby influencing the cell-fate determination of root hairs. Additionally, calcium signaling appeared to be involved in PROPEP2/Pep2-induced root hair growth. These findings shed light on the function of Peps in root hair development.