SLR — Arabidopsis thaliana

Summary

AT4G14550 (SLR, also known as IAA14) encodes an AUX/IAA family protein containing a PB1-like domain, with annotated functions including auxin receptor activity, auxin binding, DNA-binding transcription factor activity, and ubiquitin-protein transferase activity. This Arabidopsis thaliana gene on chromosome 4 is associated with diverse biological processes including embryonic organogenesis, meristem initiation, tracheary element differentiation, inflorescence phyllotactic patterning, cytokinin breakdown, and cellular response to nitrate. The protein localizes to the nuclear SCF complex, plasmodesmata, and mitochondria. SLR has been linked to numerous traits including root branching, adventitious root number, floral organ number, leaf margin morphology, vascular tissue morphology, stamen number, petal size, nitrogen and sodium content, fruit senescence, heterosis, and plant male sterility. It is also associated with stress tolerance, disease resistance, senescence, chlorophyll degradation, and auxin biosynthesis. Studies of related genes in other species connect the AUX/IAA family to root length, seed weight, photosynthetic rate, and water use efficiency.