Fig. 2From: Metabolomics approach reveals annual metabolic variation in roots of Cyathula officinalis Kuan based on gas chromatography–mass spectrumNumber of metabolites that changed significantly. a Each column shows the number of significantly changed metabolites (P < 0.05, ANOVA) with respect to the first growth year for the next 3 groups. b Each column shows the number of significantly changed metabolites (P < 0.05, ANOVA) with respect to the previous growth year for group B, group C and group DBack to article page