TIR1 — Pisum sativum

Summary

PSAT6G167560 (symbol TIR1, also known as TIR1a or PsTIR1) on garden pea chromosome 6LG2 encodes a protein with an F-box domain, leucine-rich repeats, and a transport inhibitor response domain, and exhibits auxin receptor activity, auxin binding, NEDD8 transferase activity, and ubiquitin-like protein transferase activity. The gene is associated with auxin signalling, SCF complex assembly, lateral root initiation, root structure development, and vegetative and reproductive meristem phase change. It has been linked to numerous traits including biomass yield, seed yield, adventitious root number, root system architecture, auxin content, nitrate uptake, molybdenum content, light quality response, temperature stress response, herbicide sensitivity, and floral organ number and identity. Studies of related genes in other species connect the family to drought tolerance, lateral root development, root growth, leaf venation, and fungal resistance.