RAC1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0667150 (HvRAC1) on barley chromosome 7H encodes a small GTPase of the Rho family, annotated with GDP binding, GTPase binding, and multiple prenyltransferase activities including protein geranylgeranyltransferase and farnesyltransferase activity. The gene is associated with small GTPase-mediated signal transduction, regulation of actin cytoskeleton organization, calcium-mediated signaling, and protein prenylation. It has been linked to susceptibility to powdery mildew in barley, as well as traits including seed yield, plant dry weight, root hair length, lateral root number, cadmium and arsenic concentration, abscisic acid concentration, and responses to phosphorus, ethylene, and brassinosteroids. Localization evidence connects the product to the cell projection, pollen tube tip, filiform apparatus, and secondary cell wall. Studies of related genes in other species link the family to disease resistance, grain yield, salt tolerance, and fertility.