MYB — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0300210, designated HvMYB, encodes a MYB transcription factor with DNA-binding, protein homodimerization, and zinc-binding activities. In barley, HvMYB is associated with negative regulation of abscisic acid biosynthesis, proanthocyanidin anabolism, pigmentation, determination of dorsoventral asymmetry, cellular auxin homeostasis, starch metabolism, and regulation of endosperm development. It has been connected to grain size, grain length, grain weight, grain yield, seed weight, photosynthetic rate, chlorophyll content, stomatal resistance, drought tolerance, and fungal disease response. Associations also include stress responses, ABA sensitivity, seed lipid biosynthesis, salt stress tolerance, and root and leaf development. The gene product localizes to mitochondria, cytosol, and cytoplasm. Studies of related genes in other species link the family to yield, anther development, enhanced salt tolerance, and grain iron and zinc content.