RAC1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0634280, designated HvRAC1 on barley chromosome 6H, encodes a small GTPase of the Rho family. The product is associated with GDP binding, GTPase binding, and multiple prenyltransferase activities, including protein geranylgeranyltransferase and farnesyltransferase activity. HvRAC1 is linked to small GTPase-mediated signal transduction, regulation of calcium-mediated signaling, cytoskeleton organization, and cell polarity. In barley, the gene family has been connected to susceptibility to powdery mildew. Associations also include abscisic acid concentration, auxin content, ethylene and brassinosteroid sensitivity, and responses to osmotic, salt, and abiotic stress. The gene is further linked to yield, seed yield, root and shoot traits, cell elongation, lignin biosynthesis, and trichome and petal morphology.