AXR5 — Asparagus officinalis

Summary

A4U43_C07F25760, designated AoAXR5 (also known as AUX22D, AoIAA27, and SHY2), encodes an AUX/IAA family protein on asparagus chromosome 7. The product possesses auxin receptor activity, auxin binding, transcription corepressor activity, and sequence-specific DNA binding, among other molecular functions. This gene is associated with numerous developmental and physiological processes, including inflorescence phyllotactic patterning, sepal and petal development, inflorescence meristem growth, longitudinal axis specification, and negative regulation of transcription by RNA polymerase II. It is also linked to responses to carbohydrate, low fluence red light, and hydrogen peroxide-mediated signaling. Localization evidence connects the product to the nucleus, cytosol, plasmalemma, and SCF complex. Associations with agronomically relevant traits include biomass yield, photosynthetic ability, photoperiod-sensitive flowering time, leaf angle, root phototropism, phosphorus uptake, and water stress response. Studies of related genes in other species link the family to auxin resistance, lateral root initiation, and vascular tissue development.