AFB1 — Oryza sativa Japonica

Summary

OsAFB1 (also known as TIR1, AFB2, AFB3, AFB4, AFB5, GRH1) on rice chromosome 4 encodes an F-box and leucine-rich repeat domain-containing protein with auxin receptor activity, auxin binding, NEDD8 transferase activity, and multiple transporter activities including auxin influx and efflux. It is associated with diverse biological processes such as SCF complex assembly, regulation of defense response by callose deposition, cellular response to nitrate, phosphate homeostasis, and response to cyclopentenone. The gene has been linked to phenotypes including defense, drought, salt, tillering, flower development, and growth in rice. Associations with traits include seed yield, biomass yield, grain size, grain weight, root architecture, phototropism, herbicide sensitivity, and temperature stress response. Related genes in other species are linked to auxin signaling, lateral root formation, inflorescence branching, and leaf flattening.