HAK1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.1HG0070670, designated HvHAK1 or HAK1 on barley chromosome 1H, encodes a transmembrane receptor protein serine/threonine kinase with leucine-rich repeat domains and histone H2AS1 kinase activity. The gene is associated with potassium uptake, salt response, brassinosteroid sensitivity, and regulation of stomatal complex development and innate immune response. It has been linked to skotomorphogenesis, heat acclimation, seedling development, embryo sac and ovule development, microtubule bundling, and detection of brassinosteroid stimulus. The encoded protein localises to the plasmalemma, endosome, plasmodesma, nucleus, and cytosol. Studies of related genes in other species connect the HAK1 family to grain yield, drought tolerance, pollen fertility, and potassium acquisition, though these associations are not yet established in barley.