In Fig. 5I, H2O2 was used to introduce oxidative stress to test the resistance of worms. The survival rates of worms in each group were evaluated after 3 h in S‐basal buffer containing H2O2 (10 mm). The survival rate of DMS‐treated raised from 44 ± 2% (control RNAi) to 62 ± 4% (control RNAi with DMS, P < 0.01). However, DMS failed to elevate the survival rate of worms treated with RNAi plasmid. The survival rate of msra‐1 RNAi group (28 ± 2%) showed no significant difference with that of msra‐1 RNAi with DMS group (33 ± 6%).