Studies of new polysaccharides from lasallia pustulata (L.) Hoffm
- 28 March 2003
- journal article
- Published by Cambridge University Press (CUP) in The Lichenologist
- Vol. 35 (2) , 177-185
- https://doi.org/10.1016/s0024-2829(03)00015-x
Abstract
Polysaccharides from thalli of Lasallia pustulata were extracted and characterized. The major fractions were characterized as pustulan, a β-glucan-chitin complex and a β-(1→3)-glucan. Other polysaccharides, which are minor components (less than 5%) solubilized with water from the alkali extracts of thalli, were shown to be galactomannans with a backbone of α-(l→6)- mannose partially substituted at positions 2 by galactofuranose and/or mannopyranose side chains of variable length. The relationship between these polysaccharides and those obtained by the same method from free-living fungi is discussed. The proportion or composition of the different polysaccharides studied was not affected by seasonal environmental conditions over a 2-year period.Keywords
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