Expression patterns of lignin and flavonoid biosynthesis related transcripts. The abbreviations in the upper half of the box correspond to the enzymes involved in lignin and flavonoid biosynthesis, the numbers in the lower half, separated by slash, correspond to the expression levels shown in FPKM at 0 h, 2 h and 24 h respectively. Different colors mean different expression levels. PAL: phenylalanine ammonia-lyase, EC: 4.1. 1.5. C4H: cinnamate 4-hydroxylase, EC: 184.108.40.206. 4CL: 4-hydroxycinnamoyl-CoA ligase, EC: 220.127.116.11. CHS: chalcone synthase, EC: 18.104.22.168. CHI: chalcone isomerase, EC: 22.214.171.124. F3H: flavanone 3-hydroxylase, EC: 126.96.36.199. HCT: hydroxycinnamoyl transferase, EC: 188.8.131.52. C3H: 4-coumarate 3-hydroxylase, EC: 184.108.40.206. CCoAOMT: caffeoyl-CoA O-methyl transferase, EC: 220.127.116.11. COMT: caffeic acid o-methyl transferase, EC: 18.104.22.168. F5H: ferulate 5-hydroxylase, EC:1.14.-.-. CCR: cinnamoyl-CoA reductase, EC: 22.214.171.124; CAD: cinnamyl-alcohol dehydrogenase, EC: 126.96.36.199; LACC: laccase, EC: 1.10. 3.2.