EIN3 and RSL4 interfere with an MYB–bHLH–WD40 complex to mediate ethylene-induced ectopic root hair formation in <i>Arabidopsis</i>
Yuping Qiu, Ran Tao, Ying Feng, Zhina Xiao, Dan Zhang, Yang Peng, Xing Wen, Yichuan Wang, Hongwei Guo
Abstract
Significance Plant hormones widely regulate reprogramming of stereotypic cell specifications for plants to prevail in ever-changing environments. The well-known observation that ethylene (ET) specifically promotes root hair formation from the N-position epidermal cells provides an excellent model to dissect how such reprograming events are regulated at the molecular level. This work uncovers a molecular mechanism that wires the ET signaling with the root hair specification cascade. Unexpectedly, we found that a well-recognized master regulator of root hair elongation also participates in ET-regulated root epidermal cell specification, implying the internal robustness of root epidermal cell specification.