MYB44 — Triticum aestivum

Summary

TaMYB44 (TRAESCS5B02G157300) on wheat chromosome 5B encodes a R2R3-MYB transcription factor with DNA-binding, chromatin-binding, abscisic acid binding, protein phosphatase inhibitor, MAPKK, and signaling receptor activities. It is associated with positive regulation of auxin signaling, salicylic acid-mediated signaling, stress-activated MAPK cascades, floral organ abscission, stomatal patterning, and phenylpropanoid metabolism. The gene is linked to grain iron and zinc content, test weight, seed yield, root weight, adventitious root number, plant vigor, stand establishment, photoperiod-sensitive flowering, and responses to powdery mildew, aphids, UV light, and jasmonic acid. It localizes to the nucleus, cytoplasm, chloroplast stroma, mitochondria, chromatin, and stress granules. Studies of related genes in other species connect the family to salt tolerance, drought tolerance, aphid resistance, pathogen resistance, stomatal regulation, and root system development.