Transcription factors involved in regulation of wood formation and lignin biosynthesis. (A) Number of contigs found in A. auriculiformis and A. mangium corresponding to five major wood-related transcription factor families (E-value ≤ 1E-10); (B) Phylogenetic tree of R2R3-MYBs of A. auriculiformis, A. mangium and other plant species that are involved in secondary cell wall formation. The neighbour-joining tree was obtained with MEGA 5.0 software and ClustalW2 alignments of full length amino acid sequences. Bootstrap values > 50% are shown. The bar indicates an evolutionary distance of 0.1. Ath: Arabidopsis thaliana, Am: Anthirinum majus, Zm: Zea mays, Pt: Pinus taeda, Ptr: Populus trichocarpa, Eg: Eucalyptus gunnii, Aau: A. auriculiformis, Amg: A. mangium.