AXR5 — Asparagus officinalis

Summary

A4U43_C01F4590 (AXR5/AoAXR5) on asparagus chromosome 1 encodes an AUX/IAA family protein with AUX/IAA and PB1-like domains. The product is annotated with auxin receptor activity, auxin binding, transcription corepressor activity, and sequence-specific DNA binding. It is associated with auxin signalling pathways, including TIR1-IAA-AUX/IAA interactions, ubiquitination and degradation of AUX/IAA proteins, and ARF inactivation. The gene is linked to numerous developmental and agronomic traits, including inflorescence phyllotactic patterning, sepal and petal development, seed size regulation, biomass yield, photosynthetic ability, root phototropism, and responses to water stress, nitrate, glyphosate, and red light. Localisation evidence places the product in the nucleus, cytosol, and SCF ubiquitin ligase complexes. Studies of related genes in other species link the family to auxin resistance, lateral root initiation, shoot regeneration, and vascular tissue development.