From: Polysaccharide compositions of collenchyma cell walls from celery (Apium graveolens L.) petioles
Polysaccharides | Composition mol %a | Â | ||||||
---|---|---|---|---|---|---|---|---|
HEPES | Cell walls | CDTA | Na2CO3 | 1Â M KOH | 4Â M KOH | Residue | Glycosyl linkages | |
HG | 6.8 (5.8) | 18 | 68.4 | 48.0 | 9.3 | 5.7 | 5.8 | 4-, 4,6-, t-GalpA |
RG-I backbone | 5.2 (4.0) | 3.0 | 7.0 | 15.7 | 6.2 | 5.2 | 0.9 | 2-, 2,4-Rhap; 4-GalpA |
Arabinan (RG-I) | 6.7 (7.1) | 2.7 | 8.7 | 12.8 | 5.2 | 3.3 | 0.4 | 3-, 5-, 3,5-, t-Araf |
(Arabino) galactans (RG-I) | 1.1 (1.2) | 1.4 | 2.0 | 4.3 | 1.6 | 1.8 | 0.8 | 4-, t-Galp |
RG-II | 0.8 (1.2) | 1.9 | 9.0 | 8.7 | 1.7 | 1.3 | 0.9 | 2,4-, 3,4-, t-GalpA; t-Fucp; t-Araf; 2,4-, t-Galp; t-Rhap |
Type II Arabinogalactans (AG-II) | 18.9 (20.0) | 1.0 | 1.4 | 3.4 | 1.9 | 1.8 | 0.7 | 3-, 6-, 3,6-, 3,4,6-, t-Galp; t-Araf; t-Arap; 4-, t-GlcpA; t-Rhap |
HXs | 47.9 (43.4) | 4.2 | 0.5 | 1.1 | 36.9 | 5.5 | 0.2 | 4-, 2,4-, 2,3,4-, t-Xylp; 4-, t-GlcpA; t-Araf |
XGs | 4.5 (10.5) | 7.5 | - | - | 23.1 | 52.0 | 0.8 | 2-, t-Xylp; 4-, 4,6-Glcp; 2-, t-Galp; t-Fucp |
HMs | 2.5 (1.9) | 4.8 | 0.8 | 1.7 | 10.3 | 15.6 | 1.8 | 4-, 4,6-Manp; 4-, 4,6-Glcp; 2-, t-Galp |
Cellulose | - | 51.3 | - | - | - | - | 84.9 | 4-Glcp |
Otherb | 5.7 (5.0) | 4.1 | 2.2 | 4.3 | 3.9 | 7.9 | 2.7 | 4-, 2,4-, 3,4-, 4,6-, 3,4,6-, 2,3,4,6-, t-Glcp; t-Xylp; 4-, t-GlcpA; |