Involved in disease resistance. Required for resistance conferred by multiple R genes recognizing different bacterial and oomycete pathogen isolates like avirulent P.syringae or H.parasitica (downy mildew). Required for the establishment of hypersensitive response (HR) and systemic acquired resistance (SAR) after infection with the bacterial pathogen P.syringae DC3000 carrying avrRpt2. Required for resistance to the soilborne fungus V.longisporum. Interaction with RIN4 is required for the activation of the R gene RPS2 and RPS2-mediated resistance. Interacts with RIN4 (via C-terminus). N-glycosylated. No visible phenotype under normal growth condition. In case of infection, plants loose R gene resistance mediated by RPM1, RPS2, RPS5. Plants overexpressing NDR1 show enhanced resistance against the virulent strain of the bacterial pathogen Pst DC3000.