Fig. 4

Expression of genes with putative functions in secondary cell wall synthesis. Most of the lignin biosynthetic genes (a) and cellulose synthase and cellulose synthase-like genes (b) are assigned in cluster 10 (red), but some lignin and cellulose synthetic genes are assigned in cluster 1 (green). Cinnamyl alcohol dehydrogenase (CAD); cinnamoyl CoA reductase (CCR); hydroxycinnamoyl CoA shikimate:quinate hydroxycinnamoyl transferase (HCT); L-phenylalanine ammonia-lyase (PAL); 4-coumaroyl CoA ligase (4CL); ferulic acid/ coniferaldehyde/ coniferyl alcohol 5-hydroxylase (F5H); coumaroylshikimate 3′-hydroxylase (C3′H); caffeoyl CoA 3-O-methyl transferase (CCOAOMT); caffeic acid/5-hydroxyferulic acid 3-O-methyltransferase (COMT)