Table III. Lignin composition.
The determination of thioacidolysis monomers released from extract-free stems of wild-type and CAD1-deficient poplar lines is shown. The data represent means ± sd from individually analyzed plants (n = 5). Thioacidolysis yields are expressed in µmol g−1 KL. Boldface or underlined values indicate significantly increased or decreased values, respectively, as compared with those of the wild type (Dunnett’s adjusted Student’s t test, P < 0.05).
| Line | Main H, G, and S Monomers: Total Yield and Relative Molar % |
Monomers from Aldehyde Units |
Total Lignin-Derived Monomers (Relative % of the Wild Type) | |||||
|---|---|---|---|---|---|---|---|---|
| H + G + S | H | G | S | Coniferaldehyde End Groups | Sinapaldehyde-Derived Indene | Syringaldehyde End Groups | ||
| µmol g−1 KL | % | µmol g−1 KL | µmol g−1 KL | |||||
| Wild type | 2,535 ± 78 | 0.6 ± 0.2 | 35.0 ± 1.1 | 64.4 ± 1.0 | 5.2 ± 0.3 | 4.2 ± 0.3 | 6.1 ± 0.2 | 2,572 ± 66 (100) |
| hpCAD4 | 1,821 ± 31 | 0.5 ± 0.0 | 40.0 ± 0.4 | 59.6 ± 0.4 | 3.3 ± 0.0 | 154.0 ± 10.7 | 100.5 ± 2.5 | 2,093 ± 39 (81) |
| hpCAD19 | 1,805 ± 13 | 0.5 ± 0.1 | 40.1 ± 0.3 | 59.3 ± 0.3 | 3.4 ± 0.5 | 139.8 ± 12.6 | 80.1 ± 17.1 | 2,039 ± 42 (79) |
| hpCAD24 | 1,876 ± 111 | 0.5 ± 0.1 | 39.4 ± 0.3 | 60.1 ± 0.2 | 3.6 ± 0.2 | 141.8 ± 5.4 | 70.3 ± 3.7 | 2,105 ± 106 (81) |