Table 2.
Lignin Content and Composition in the Wild Type and the fra2 Mutant
| Klason Lignina
|
Lignin Composition (mg/g Cell Wall)b
|
||||
|---|---|---|---|---|---|
| Plant | % of Cell Wallc | % of Wild-Type Klason Lignin | Guaiacyl Ligninc | Syringyl Ligninc | S/Gd |
| Wild type | 15.8 ± 0.4 | 100 | 34.0 ± 0.3 (100%) | 15.6 ± 1.4 (100%) | 0.46 |
| fra2 | 14.4 ± 0.6 | 91 | 14.2 ± 4.2 (42%) | 10.2 ± 3.6 (65%) | 0.72 |
a
Klason lignin was assayed according to Kirk and Obst (1988).
b
Lignin monolignol composition was analyzed accroding to Akin et al. (1993).
c
Each data point is the mean ±se of two separate assays. Data in parentheses are guaiacyl or syringyl lignin units taken as either 100 in the wild type or a percentage of the wild type in fra2.
d
G (guaiacyl) is the sum of vanillin, acetovanillin, and vanillic acid; S (syringyl) is the sum of syringaldehyde, acetosyringaldehyde, and syringic acid.