Fig. 4
Terpene Synthase Gene Family Phylogeny and Gene Expression. Gene labels in red are putative O. harringtonii terpene synthases as identified by a pHMM (labeled with TRINITY) based on sequences from van Shie et al. 2007, which are shown in black. The seven TPS subfamilies a-g are indicated on the tree; note that O. harringtonii transcripts fall into two clades within subfamily b, represented by b1 and b2. All TPS subfamilies are supported by BS > 95; full support values can be found in Additional file 5. Relative expression for tissue-specific libraries (SS = stigma/style; S = stamens; P = petals; H = hypanthium; B = bud; L = leaf) for each O. harringtonii transcript is shown on the right, including its cluster number (CL) if the gene was differentially expressed. Putative (R)-(−)-linalool synthase transcripts are indicated with arrows