Table I.

Comparison of cell wall polysaccharide composition in various barley tissues

Note the relatively low levels of xyloglucans and pectin in these walls, particularly those from grain. ND, Not detected.

TissueCellulose(1,3;1,4)-β-GlucanHeteroxylanXyloglucanPectin
Starchy endosperm3%70%20%TraceND
Aleurone2%26%71%NDND
Coleoptile (4 d)35%10%32%10%12%
Young leaf63%16%11%Trace5%
Stem65%5%28%NDND