MYB44 — Oryza sativa Indica Group

Summary

BGIOSGA030245 (OiMYB44) on Indica rice chromosome 9 encodes a 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 and jasmonic acid signaling pathways, MAPK cascades, stomatal patterning, floral organ abscission, pigmentation, phenylpropanoid metabolism, camalexin biosynthesis, UV response, freezing response, and circadian clock entrainment. The gene is linked to grain length, seed yield, hull color, leaf curling, shoot growth angle, adventitious root number, phosphorus uptake, photoperiod-sensitive flowering, and responses to aphids, powdery mildew, UV-B, osmotic stress, ethylene, and brassinosteroids. Studies of related genes in other species connect the family to salt and osmotic stress tolerance, aphid and pathogen resistance, leaf senescence, anthocyanin accumulation, and seed oil content.