RHD2 — Beta vulgaris subsp. vulgaris

Summary

BVRB_4G075730, designated BvRHD2 on sugar beet chromosome 4, encodes a protein with NADPH oxidase, FAD-binding, and EF-hand calcium-binding domains. The enzyme exhibits NAD(P)H oxidase H2O2-forming activity, calcium ion binding, and multiple kinase activities. BvRHD2 is associated with hydrogen peroxide biosynthesis, the respiratory burst involved in defense response, immune response-regulating signaling, defense response by callose deposition, and detection of bacteria. It is linked to root hair elongation, root hair tip growth, root growth, lateral root induction, and root epidermal cell differentiation. The gene has been connected to agronomically important traits including grain yield, seed yield, biomass yield, bacterial blight disease resistance, water use efficiency, leaf rolling response, and sucrose synthase activity. Studies of related genes in other species link the family to salt, heat, cold, and oxidative stress tolerance, as well as late blight resistance and photosynthetic induction.