Multiple phytohormones promote root hair elongation by regulating a similar set of genes in the root epidermis in Arabidopsis.

ABSTRACT: Multiple phytohormones, including auxin, ethylene, and cytokinin, play vital roles in regulating cell development in the root epidermis. However, their interactions in specific root hair cell developmental stages are largely unexplored. To bridge this gap, we employed genetic and pharmacological approaches as well as transcriptional analysis in order to dissect their distinct and overlapping roles in root hair initiation and elongation in Arabidopsis thaliana Our results show that among auxin, ethylene, and cytokinin, only ethylene induces ectopic root hair cells in wild-type plants, implying a special role of ethylene in the hair initiation stage. In the subsequent elongation stage, however, auxin, ethylene, and cytokinin enhance root hair tip growth equally. Our data also suggest that th

SUBMITTER: Zhang S 

PROVIDER: S-EPMC5181580 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature