RHD2 — Solanum tuberosum

Summary

StRHD2 (PGSC0003DMG400013550) on potato chromosome 7 encodes a respiratory burst oxidase homolog (RBOH) with NAD(P)H oxidase, peroxidase, and calcium-binding activities, placing it in the NADPH oxidase family. It is associated with immune response-regulating signaling, defense response by callose deposition, respiratory burst, H₂O₂ biosynthesis, and detection of bacteria. The gene is linked to root hair elongation, root growth, lateral root induction, auxin distribution, cell wall strength, and root oxidative activity. It is also associated with grain yield, seed yield, biomass yield, bacterial blight disease resistance, aphid response, water use efficiency, transpiration rate, leaf rolling, and osmotic and aluminum stress sensitivity. Studies of related RBOH family members in other species link the family to salt, heat, cold, and oxidative stress tolerance, as well as late blight resistance and photosynthetic induction.