AXR5 — Solanum lycopersicum

Summary

SlAXR5 (SOLYC09G065850.4) encodes an AUX/IAA family protein on tomato chromosome 9, featuring AUX/IAA and PB1 domains and annotated with auxin receptor activity, auxin binding, transcription corepressor activity, and red/far-red light photoreceptor activity. It is associated with sepal formation, inflorescence phyllotactic patterning, strigolactone and lycopene anabolism, chlorophyll and cellulose metabolism, glucose-mediated signalling, and dehiscence. The gene is linked to seed length and shape, fruit position and growth, leaf chlorophyll content, root volume, adventitious root number, flower abortion, water stress response, and glyphosate sensitivity. Localisation evidence places the product in the nucleus, cytosol, plasmalemma, plant-type vacuole, and SCF ubiquitin ligase complexes. Studies of related genes in other species connect this gene family to root gravitropism, lateral root initiation, auxin resistance, parthenocarpy, plant height, and fruit weight.