Fig. 2: Expansion and diverged expression patterns of triterpenoid saponin biosynthesis (TBS)-related genes in P. grandiflorus.

a, b Phylogeny of the GGPS (a) and bAS (b) gene families in P. grandiflorus. Phylogenetic trees were constructed using the maximum likelihood (ML) method. c Expression profiles of TBS-related genes in P. grandiflorus. Data represent log2 FPKM values of RNA-Seq data generated from eight different tissues, including root, leaf, stem, seed, and four flowers, of plants treated with methyl jasmonate (MJ) for 12, 24, and 48 h (MJ 12 h, MJ 24 h, and MJ 48 h, respectively); CT 12 h indicates the control