Plant elicitor Peptides regulate root hair development in Arabidopsis

• Published in: Frontiers in plant science Vol. 15; p. 1336129
• Main Authors: Jing, Yanping, Zhao, Fugeng, Lai, Ke, Sun, Fei, Sun, Chenjie, Zou, Xingyue, Xu, Min, Fu, Aigen, Sharifi, Rouhallah, Chen, Jian, Zheng, Xiaojiang, Luan, Sheng
• Format: Journal Article
• Language: English
• Published: Switzerland Frontiers Media S.A 15-02-2024
• Subjects: Ca signaling; plant elicitor peptide (Pep); Plant Science; PROPEP; regulatory mechanism; root hair growth; root hair growth; plant elicitor peptide (Pep); PROPEP; regulatory mechanism; Ca signaling
• ISSN: 1664-462X; 1664-462X
• DOI: 10.3389/fpls.2024.1336129

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.