MYC2a, SmMYC2a suppressed hairy roots. MYC2b, SmMYC2b suppressed hairy roots. AACT, acetyl-CoA C-acetyltransferase; CDP-ME, 4-(cytidine 5’-diphospho)-2-C-methyl- D-erythritol; CDP-ME2P, 2-phospho-4-(cytidine 5’-diphospho)-2-C-methyl-D-erythritol; CMK, 4-(cytidine 5’-diphospho)-2-C-methyl- D-erythritol kinase; CPS, copalyl diphosphate synthase; DMAPP, dimethylallyl diphosphate; DXP, 1-deoxy-D-xylulose 5-phosphate; DXR, 1-deoxy-D-xylulose 5-phosphate reductoisomerase; DXS, 1-deoxy-D-xylulose 5-phosphate synthase; FPP, farnesyldiphosphate; FPPS, farnesyl diphosphate synthase; G3P, glyceraldehyde 3-phosphate; GA, gibberellin; GGPP, geranylgeranyl diphosphate; GGPPS, geranylgeranyldiphosphate synthase; GPP, geranyl diphosphate; GPPS, geranyl diphosphate synthase; HDR, 4-hydroxy-3-methylbut-2-enyl diphosphate reductase; HDS,4-hydroxy-3-methylbut-2-enyl diphosphate synthase; HMBPP, 4-hydroxy-3-methylbut-2-enyl diphosphate; HMG-CoA, 3-Hydroxy-3-methylglutary l-CoA; HMGR, hydroxymethylglutaryl-CoA reductase; HMGS, hydroxymethylglutaryl-CoA synthase; IDI, isopentenyl diphosphate isomerase; IDS, isoprenyl diphosphate synthase; IPP, isopentenyl diphosphate; KS, kaurene synthase; KSL, kaurene synthase-like; MCT, 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase; MDC, mevalonatepyrophosphate decarboxylase; MDS, 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase; ME-cPP, 2-C-methyl-D-erythritol 2,4-cyclodiphosphate; MeJA, methyljasmonate; MEP, 2-C-methyl-D-erythritol 4-phosphate; MK, mevalonate kinase; MVA, mevalonate; MVAP, mevalonate-5-phosphate; MVAPP, mevalonate-5-diphosphate; PMK, 5-phosphomevalonate kinase; CYP76AH1, cytochrome P450 monooxygenase 76AH1. Red indicated enhanced expression or production; blue indicated repressed expression or production; white indicated the expression of control; darker color indicated more significant change. All the values were ratios of average gene expression level or compounds content in MYC2-RNAi hairy roots to control.