Open AccessBrown seaweed Cystoseira schiffneri as a promising source of sulfated fucans: Seasonal variability of structural, chemical, and antioxidant properties
Author(s) -
Benslima Abdelkarim,
Sellimi Sabrine,
Hamdi Marwa,
Nasri Rim,
Jridi Mourad,
Cot Didier,
Li Suming,
Nasri Moncef,
Zouari Nacim
Publication year - 2021
Publication title -
food science and nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 27
ISSN - 2048-7177
DOI - 10.1002/fsn3.2130
Subject(s) - fucoidan , fucose , brown algae , brown seaweed , monosaccharide , polysaccharide , sulfation , algae , sugar , antioxidant , fucales , chemistry , galactose , sulfate , botany , food science , biology , biochemistry , organic chemistry
A fucoidan, sulfated polysaccharide, was extracted from the brown seaweed Cystoseira schiffneri during 4 harvest periods (December, April, July, and September) and studied for its structural and chemical properties. The Cystoseira schiffneri fucoidan (CSF) showed important variation in sulfate content ranging from 7.8% in December to 34.8% in July. This was confirmed by Fourier transform infrared and nuclear magnetic resonance spectroscopies showing characteristic signals of sulfated polysaccharides. Molecular mass of the CSF varied as a function of season from 3,745 in December to 26,390 Da in July. Gas chromatography–mass spectroscopy showed that CSF fractions were “mannogalactofucans” composed mainly of mannose, fucose, and galactose with low levels of other monosaccharides. Moreover, interesting in vitro antioxidant activities that depend on the harvest season were noted for CSF. Thus, the present work might contribute to establish criteria for extracting bioactive fucoidans from an endemic Tunisian seaweed C. schiffneri .