Fig. 3

a Maximum Likelihood (ML) phylogenetic tree based on amino acid sequences of the conserved pyridoxal-dependent decarboxylase domain. The alignment includes the deduced protein sequences of the UN13591 and UN15671 unigenes of L. williamsii, A. thaliana aromatic aldehyde synthase (ATAAS), and P. somniferum tyrosine/DOPA decarboxylases (TYDC1 and TYDC2). Branch numbers represent the robustness of the three analyzed by approximate likelihood-ratio test (aLRT). b Expression patterns of L. williamsii unigenes in buttons and roots derived from RNA-seq analysis. RNA-seq data are shown as relative frequency values