RPS2 and infection: Although RPS2- and RPM1-mediated immunity require common genes (e.g., NON-RACE-SPECIFIC DISEASE RESISTANCE1 [NDR1]), RPS2 signaling results in stronger SA-related defenses upon infection (Century et al., 1995; Belkhadir et al., 2004; Day et al., 2006; Lee et al., 2007).