O-Methylated mannogalactan from the microalga Coccomyxa mucigena, symbiotic partner of the lichenized fungus Peltigera aphthosa.
A structural study of the carbohydrates from Coccomyxa mucigena, the symbiotic algal partner of the lichenized fungus Peltigera aphthosa, was carried out. It produced an O-methylated mannogalactan, with a (1-->6)-linked beta-galactopyranose main-chain partially substituted at O-3 by beta-Galp, 3-OMe-alpha-Manp or alpha-Manp units. There were no similarities with polysaccharides previously found in the lichen thallus of P. aphthosa. Moreover, the influence of lichenization in polysaccharide production by symbiotic microalgae and the nature of the photobiont in carbohydrate production in lichen symbiosis are also discussed.
Cordeiro
Lucimara M C
LM
Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, CP 19.046, CEP 81.531-980 Curitiba, PR, Brazil.
Sassaki
Guilherme L
GL
Gorin
Phillip A J
PA
Iacomini
Marcello
M
D001203:Ascomycota / Q000502:physiology*; D002849:Chromatography, Gas; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D056890:Eukaryota / Q000737:chemistry* / Q000502:physiology; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D013559:Symbiosis