Table 1 Relative abundance of lignin-derived compounds. 13C-IS py-GC–MS relative abundance of lignin-derived compounds of the lignified tissues of A. antarctica and P. australis, excluding p-hydroxyphenyl products also derived from aromatic amino acids. Corrected for relative response factors and the relative abundance of 13C structural analogues. Summed on the basis of structural classification according to Del Río et al. [45] and Van Erven et al. [46]. Average and standard deviation of technical triplicates
From: Profiling the cell walls of seagrasses from A (Amphibolis) to Z (Zostera)
Amphibolis antarctica | Posidonia australis | ||||
|---|---|---|---|---|---|
roots | rhizome | roots | rhizome | sheath | |
Lignin subunits (%) | |||||
G | 59.7 ± 1.0 | 55.0 ± 0.7 | 84.0 ± 0.5 | 84.0 ± 1.9 | 71.2 ± 3.0 |
S | 40.3 ± 1.0 | 45.0 ± 0.7 | 16.0 ± 0.5 | 16.0 ± 1.9 | 28.8 ± 3.0 |
S/G | 0.7 ± 0.0 | 0.8 ± 0.0 | 0.2 ± 0.0 | 0.2 ± 0.0 | 0.4 ± 0.0 |
Structural moieties (%) | |||||
Unsubstituted | 10.2 ± 0.4 | 8.9 ± 0.1 | 10.9 ± 0.5 | 10.6 ± 0.9 | 9.7 ± 0.5 |
Methyl | 5.3 ± 0.1 | 5.3 ± 0.2 | 6.6 ± 0.1 | 6.6 ± 0.1 | 7.6 ± 0.9 |
Vinyl | 29.6 ± 1.1 | 24.7 ± 0.3 | 33.5 ± 0.6 | 29.9 ± 0.7 | 30.9 ± 0.7 |
Cα-ox | 4.8 ± 0.1 | 5.1 ± 0.0 | 6.1 ± 0.1 | 6.0 ± 0.3 | 7.6 ± 0.1 |
Cβ-oxa | 1.6 ± 0.0 | 1.9 ± 0.0 | 2.4 ± 0.0 | 2.7 ± 0.5 | 4.4 ± 0.3 |
Cγ-ox | 38.0 ± 2.1 | 43.2 ± 0.8 | 30.9 ± 1.0 | 35.8 ± 3.5 | 28.1 ± 1.3 |
Miscellaneous | 10.6 ± 0.7 | 10.9 ± 0.2 | 9.6 ± 0.2 | 8.5 ± 1.0 | 11.6 ± 0.1 |
PhCγb | 49.7 ± 1.6 | 55.9 ± 0.6 | 41.9 ± 1.1 | 46.4 ± 2.5 | 43.4 ± 1.2 |