Fig. 4

The expression profiles of putative genes encoding enzymes involved in terpene backbone biosynthesis. a The three squares indicate the gene expression levels (log2 FPKM) in C. goeringii flowers on the stage of A, B, and C, which are shown by a color gradient from orange to grey to green. b and c Expression levels of putative genes in the cytosol mevalonate (MVA) pathway (b) and plastidial methylerythritol phosphate (MEP) pathway (c). The abbreviated names of enzymes in each catalytic step are in bold. The putative unigenes contained the full-length open reading frames (ORFs) are shown in bold. The intermediate compounds in both pathways are listed by alphabetical order: CDP-ME, 4-diphosphocytidyl-2-C-methylerythritol; CDP-MEP, 4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate; DXP, 1-deoxy-D-xylulose 5-phosphate; G3P, glyceraldehyde-3-phosphate; HMBPP, 4-hydroxy-3-methyl-but-2-enyl pyrophosphate; HMG-CoA, S-3-hydroxy-3-methylglutaryl-CoA; MVP, mevalonate-5-phosphate; MVPP, mevalonatediphosphate; ME-cPP, 2-C-methyl-D-erythritol 2,4-cyclodiphosphate