Table 7.
Comparisons of EST abundance of genes related to lignin biosynthesis in different wood development stages.
| Gene | EST abundance in EW and LW | EST abundance in JW and MW | ||||
| EW a | LWb | P-value e | JW c | MW d | P-value e | |
| CCoAOMT | 16 | 13 | > 0.05 | 9 | 12 | 0.04 |
| C4H | 10 | 8 | > 0.05 | 4 | 4 | > 0.05 |
| 4CL | 10 | 6 | > 0.05 | 8 | 5 | > 0.05 |
| CAD | 6 | 3 | 0.07 | 1 | 4 | 0.04 |
| C3H | 7 | 2 | > 0.05 | 2 | 3 | > 0.05 |
| COMT | 2 | 6 | > 0.05 | 3 | 3 | > 0.05 |
| CCR | 1 | 1 | > 0.05 | 2 | 0 | > 0.05 |
| PAL | 0 | 2 | > 0.05 | 2 | 0 | > 0.05 |
| Peroxidase | 11 | 5 | 0.08 | 0 | 7 | 0.001 |
| Laccase | 16 | 20 | > 0.05 | 16 | 10 | > 0.05 |
| SAMS | 15 | 31 | 0.05 | 19 | 11 | > 0.05 |
| Dirigent-like | 4 | 3 | > 0.05 | 3 | 1 | > 0.05 |
| Cytochrome c oxidase | 7 | 7 | > 0.05 | 10 | 0 | 0.01 |
a: The number of ESTs for the combined earlywood (EW) libraries. Total ESTs in the combined earlywood libraries from juvenile, transition and mature age are 2,790;
b: The number of ESTs for the combined latewood (LW) libraries. Total ESTs in the combined latewood libraries from juvenile, transition and mature age are 3,169;
c: The number of ESTs for the combined juvenile wood (JW) libraries. Total ESTs in the combined JW libraries from earlywood and latewood tissues are 2,902;
d: The number of ESTs for the combined mature wood (MW) libraries. Total ESTs in the combined MW libraries from earlywood and latewood tissues are 1,564;
e: Statistical significance according to Audic and Claverie 1997 [79].