Fig. 4
Analysis of genes involved in benzaldehyde and phenylacetaldehyde biosynthesis and metabolic pathway. A Genes involved in benzaldehyde and phenylacetaldehyde biosynthesis and metabolic pathway with heatmaps showing the relative expression levels in flowers from three flowering stages, leaves, and stems. TPMs were obtained from the mean values of three replicates (Additional file 7). Gene expression levels are normalised and represented as log2(TPM + 1). Blue, low expression levels; red, high expression levels. B Protein neighbour-joining tree of PAAS genes in f M. paniculata and C. maxima with outgroups of RhybPAAS (Rosa hybrid; Uniprot entry: Q0ZS27), PhybPAAS (Petunia hybrida; Uniprot entry Q0ZQX0), and AthaPAAS (A. thaliana; Uniprot entry: Q8RY79) constructed with 1000 bootstrap replicates. C Gene collinearity analysis between Me2G_2379, Me2G_2381, and Me2G_2382 in M. paniculata and Cg1g029630, Cg1g029640 in C. maxima. D Overview of LTR insertions upstream PAAS genes Cg1g029630 and Cg1g029640 in C. maxima. Black line represents genome sequence; green bold arrow represents length and orientation of CDS; red bold arrow represents length and orientation of LTR fragment. TSS: transcription start site; TTS: transcription termination site