Fig. 1

Gene expression profiles related to three metabolic pathway modules of ginsenoside biosynthesis of P. ginseng. a, the profiles in ginseng roots of 1–5 years old. b, the profiles in different ginseng tissues of 5 years old. MEP, the MEP pathway. MVA, the MVA pathway. Skeleton, the triterpene skeleton biosynthesis pathway. Ginsenoside, the late steps for ginsenoside biosynthesis pathway. R1-R5, ginseng root samples of 1–5 years old. Rc, root cores. Rt, lateral roots. Rh, rhizomes. St, stems, Lf, leaves. For the calculation of the gene expression levels of each pathway module of each sample, all the TPM values of the expressed gene annotated to the enzymes of this module of that sample were summarized together. The heatmap was drawn with R package geneplotter and gplots