RD — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0274160 (HvRD) on barley chromosome 3H encodes a protein with domains including NAD(P)_dehydrat-like, Epimerase_deHydtase and NAD(P)-bd_dom_sf, and is annotated with dihydroflavanol 4-reductase, flavanone 4-reductase, flavonol synthase, naringenin-chalcone synthase, chalcone isomerase and oxidoreductase activities. The gene is associated with anthocyanin, flavonol, proanthocyanidin and phenylpropanoid metabolism, pigmentation, and responses to UV-B, oxidative stress, jasmonic acid, auxin and wounding. It has been linked to seed coat colour, anthocyanin content, plant height, photosynthetic ability, root phototropism, stamen morphology, herbicide sensitivity, insect damage response, low-temperature and nitrogen stress tolerance, and root-knot and cyst nematode resistance. The protein localises to the cytosol, nucleus, tonoplast and endoplasmic reticulum. Studies of related genes in other species connect the family to flavonoid biosynthesis, UV-B tolerance and seed coat pigmentation.