The transcription levels of DoTPS genes and synthesis of geraniol and linalool in D. officinale after MeJA treatment. (A) Effect of MeJA treatment on the expression of DoTPS genes. (B) Effect of MeJA treatment on the synthesis of geraniol. (C) Effect of MeJA treatment on the synthesis of linalool. Ten 10-month-old D. officinale seedlings exposed to 1 mM MeJA for 0, 12, 24, and 48 h were harvested. Heatmap was created using the TBtools software (https://github.com/CJ-Chen/TBtools), and gradient color from green to red was expressed as the log2-transformed expression levels of each DoTPS gene. Each bar represents the mean (±standard error, n = 3) of three independent biological replicates. Different letters above the bars indicated significant differences (p < 0.05, Duncan’s multiple range test). CK, control treatment without MeJA. MeJA, methyl jasmonate. The expression values of DoTPS genes in response to MeJA treatment are listed in Table S10.