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Seasonal variations of the composition and structural characteristics of polysaccharides from the brown alga Costaria costata

“…those obtained previously for Alaria fistulosa [24] in which the highest amount of fucoidan accumulated in reproductive organs, sporophyllae. An increase of fucoidan level during maturation of sporangiae was also observed in L. japonica [5]. Comparison of the monosaccharide composition of the fucoidans of FLM 5 and FLM 6fert ( Table 2) showed that the dominant monosaccharides in the fucoidan became fucose and galactose with the constant mole ratio 1:0.27-0.29 as the plants transitioned to spore setting.…”

Monthly changes in the content and monosaccharide composition of fucoidan from Undaria pinnatifida (Laminariales, Phaeophyta)

“…Several studies have indicated that variations in the fucoidan content and their structural characteristics seem to be differentiated according to the seaweed species, season of collection (Honya et al 1999), and age of the plants (Zvyagintseva et al 2003). Different parts of a single algal thallus have been shown to have varying amounts of fucoidans, as in the case of Alaria fistulosa Postels and Ruprecht (Usov et al 2005).…”

Biological Activities of Fucose-Containing Polysaccharide Ascophyllan Isolated from the Brown AlgaAscophyllum nodosum

“…Laminaran and especially fucoidan are drawing increasing attention from medical and food supplement areas for their potential biological activities. Although the composition of these polysaccharides, molecular sizes, and entire structures vary depending on the algal species, the extraction procedure, and even the season of harvest and local climate conditions, 1) the polysaccharides have a common structural feature. Fucoidan is basically a sulphated fucan containing fucose as a main component and sometimes containing uronic acids, galactose, and xylose as minor compositions.…”

“…Fucoidan is basically a sulphated fucan containing fucose as a main component and sometimes containing uronic acids, galactose, and xylose as minor compositions. 2) Laminaran is composed of (1,3)--glucan with (1,6) branching, 3) and alginate is composed of mannuronic and guluronic acid with (1,4)-linkages. 4) In addition to the well-known anticoagulant and antithrombotic activity, fucoidans act on the inflammation and immune systems and have antitumor and antiviral activities and antiproliferative and antiadhesive effects on cells, and can interfere with the mechanisms involved in fertilization.…”