Fig. 2

Identification of differentially accumulated metabolites in petals of different rhododendron varieties (NW and YJ) at the same developmental stage. a Volcano plot of differentially accumulated metabolites in the NW1 vs. YJ1 comparison group, as detected by GC–TOF–MS. b Volcano plot of differentially accumulated metabolites in the NW1 vs. YJ1 comparison group, as detected by LC–MS (POS). c Volcano plot of differentially accumulated metabolites in the NW1 vs. YJ1 comparison group, as detected by LC–MS (NEG). d Venn diagram of common differentially accumulated metabolites detected by GC–TOF–MS. e Venn diagram of common differentially accumulated metabolites detected by LC–MS (POS). f Venn diagram of common differentially accumulated metabolites detected by LC–MS (NEG)