POLYSACCHARIDES FROM THE GREEN SEAWEED CODIUM DECORTICATUM. STRUCTURE AND CELL WALL DISTRIBUTION

PAULA V. FERNÁNDEZ; M. PAULA RAFFO ; JOSEFINA ALBERGHINA; MARINA CIANCIA

CARBOHYDRATE POLYMERS

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2015 vol. 117 p. 836 - 844

0144-8617

The cell wall polysaccharides from Codium decorticatum and their assembly were studied and these resultswere compared with those obtained previously for this genus. The water soluble polysaccharides are:(i) Pyruvylated and sulfated 3- and 6-linked -d?galactans with sulfate mainly on C-4 and also on C-6.Pyruvate ketals are linked to O-3 and O-4 of terminal -d-galactose or O-4 and O-6 of 3-linked -d-galactose. (ii) Sulfated 3-linked -l-arabinans substituted on C-2 or C-2 and C-4 predominantly withsulfate, but also with single stubs of arabinose, and (iii) 4-linked -d-mannans with a low degree ofsulfation on C-2. The whole polysaccharide system comprises 6.9% of sulfated polysaccharides and 32.9%of fibrillar polysaccharides, mostly insoluble mannans. By in situ localization it was possible to detect twosimilar fibrillar layers separated by a zone rich in charged polymers. Besides, arabinogalactan proteinsco-localized with the fibrillar components.