Fig. 7

Platycodin D-related synthesis pathway under salt stress. (a) The proposed metabolic pathway is based on the literature and network. The metabolites in red color were the differentially abundant metabolites detected in this study. The metabolites in black color were not detected. The red italics and small icons represent genes, whereas purple color represents downregulation and red represents upregulation; (b) Salt-induced Platycodin D concentration relatively changed compared with the control