RHD2 — Cucumis sativus

Summary

CsRHD2 (CSA_6G301070) on cucumber chromosome 6 encodes a superoxide-generating NAD(P)H oxidase, a respiratory burst oxidase homolog with NADPH_Ox, FAD-binding, and EF-hand calcium-binding domains. The enzyme is associated with immune response-regulating signaling, defense response by callose deposition, respiratory burst, H2O2 biosynthesis, and detection of bacteria. It is linked to root hair elongation, root hair tip growth, root hair formation and development, lateral root induction, root growth, phosphorus acquisition, auxin distribution, and cell wall strength. Associations also include grain yield, seed yield, biomass yield, bacterial blight disease resistance, leaf rolling response, water use efficiency, transpiration rate, osmotic response sensitivity, brassinosteroid sensitivity, ethylene sensitivity, and stomatal closure. The protein localizes to the ER, Golgi, endosome, plastid, and vacuole. Studies of related genes in other species link the family to salt, cold, heat, and oxidative stress tolerance, as well as lateral root development and photosynthetic induction.