Journal Article Arabidopsis Proteins Research Support, Non-U.S. Gov't Basic Helix-Loop-Helix Transcription Factors RSL4 protein, Arabidopsis Transcription Factors Arabidopsis Arabidopsis thaliana root hairs AP2 ARABIDOPSIS HISTIDINE KINASE B-type ARABIDOPSIS RESPONSE REGULATOR Cytokinins ERF transcription factor Ethylenes Indoleacetic Acids Plant Growth Regulators Plant Proteins RHD6 protein, Arabidopsis ROOT HAIR DEFECTIVE 6-LIKE 4 Review cell growth cell wall cytokinin diffuse growth excess nutrition gene regulatory network gene regulatory networks moderate low temperature nutrients sensing