AXR2 — Arabidopsis thaliana

Summary

AT3G23050 (AXR2, IAA7) on Arabidopsis thaliana chromosome 3 encodes an AUX/IAA family protein with auxin receptor activity, auxin binding, DNA-binding transcription factor activity, and ubiquitin-protein transferase activity. It localizes to the nuclear SCF complex and is associated with auxin, abscisic acid, and ethylene resistance, as well as ammonium tolerance. The gene is associated with axis elongation, tropism, response to gravity, meristem initiation, inflorescence phyllotactic patterning, and cytokinin breakdown. It has been linked to numerous traits including root shape, root branching, root hair density, adventitious root number, inflorescence height, petal number and size, carpel number, leaf margin serration, fruit senescing quality, sodium content, and plastochron. Studies of related genes in other species link the family to seminal root length, plant fresh weight, leaf chlorophyll content, seed weight, fruit weight, net photosynthetic rate, water use efficiency, and virus resistance.