Influence of HGQ on the antioxidant enzyme activity in N2 nematodes. Synchronized nematodes were prepared as in Figure 4 until lysis. The SOD (A), CAT (B) and GPx (C) activity were determined, respectively with Total Superoxide Dismutase Assay Kit, Catalase Assay Kit and Total Glutathione Peroxidase Assay Kit. The results were normalized by protein content. Data are shown as mean ± SEM of three independent experiments, and statistical significance is determined by one-way ANOVA followed by Tukey’s post hoc test. *p<0.05.