TIR1 — Pisum sativum

Summary

PsTIR1 (PSAT3G024480) on garden pea chromosome 3LG5 encodes an F-box and leucine-rich repeat domain-containing protein with auxin receptor activity, auxin binding, NEDD8 transferase activity, and ubiquitin-like protein transferase activity. It is associated with SCF complex assembly, auxin signalling, lateral root initiation, root structure development, and reproductive meristem phase change. The gene is linked to defence response to insects, regulation of jasmonic acid-mediated signalling, positive regulation of leaf senescence, and stamen development. Traits associated with PsTIR1 include biomass yield, seed yield, adventitious root number, seedling cotyledon size, floral organ number, phyllotaxy, phototropism, temperature stress response, aluminium response, nitrate uptake, and auxin content. Studies of related genes in other species link the family to root growth, lateral root organogenesis, drought tolerance, auxin resistance, and leaf venation.