RHD2 — Cucumis sativus

Summary

CsRHD2 (CSA_1G569450) on cucumber chromosome 1 encodes a respiratory burst oxidase homolog (RBOH) with NADPH oxidase, FAD-binding, ferric reductase, and EF-hand calcium-binding domains, and exhibits NAD(P)H oxidase H2O2-forming activity, calcium ion binding, and multiple kinase activities. The gene is associated with immune response-regulating signaling, defense response by callose deposition, respiratory burst in defense, H2O2 biosynthesis, root epidermal cell differentiation, and carbohydrate homeostasis. It has been linked to traits including grain yield, seed yield, biomass yield, bacterial blight disease resistance, leaf rolling, root hair length and elongation, water use efficiency, transpiration rate, phototropism, aluminum and osmotic stress responses, phosphorus uptake, and brassinosteroid and ethylene sensitivity. Studies of related genes in other species connect the family to salt, cold, heat, and oxidative stress tolerance, lateral root formation, and resistance to leaf-infecting pathogens.