RSL4 — Arabidopsis thaliana

Summary

AT1G27740, designated RSL4 in Arabidopsis thaliana, encodes a basic helix-loop-helix (bHLH) transcription factor with DNA binding and protein dimerization activity. This nuclear protein is associated with root hair formation, elongation, density, and length, as well as phosphorus uptake. It has been linked to root epidermal cell differentiation, hair cell differentiation, epidermis development, and cell wall modification. RSL4 is also associated with auxin transport and anabolism, shade avoidance, secretion, and regulation of cell growth. Studies of related genes in other species have linked the gene family to grain size and auxin sensitivity.