Fig. 5From: Metabolomic analysis reveals the interaction of primary and secondary metabolism in white, pale green, and green pak choi (Brassica rapa subsp. chinensis)Antioxidant activity of methanol extracts from three pak choi cultivars. a superoxide radical scavenging assay, b reducing power assay, and c DPPH radical scavenging assay. The means and standard deviation were calculated from three biological replicates. Mean values with a different letter a–e were significantly different (p < 0.05, ANOVA, DMRT)Back to article page