Fig. 5

The biosynthetic pathway of polyphyllin and the identified PBGs. (a) The putative biosynthetic pathway. (b) The number of PBGs. (c) The expression profile of differentially expressed PBGs. The green star represents the PBGs identified in the target modules of co-expression network analysis. The yellow start represents the PBGs determined in the above spatiotemporal expression pattern. The scale bar on the bottom represents gene expression levels. Blue and red denotes the low-level expression and high-level expression of the related genes