Akademik Veri Yönetim Sistemi
Turkish Journal of Fisheries and Aquatic Sciences, cilt.26, sa.8, 2026 (SCI-Expanded, Scopus)
Polysaccharides from brown algae are valuable bioactive compounds with diverse structures and antioxidant potential. Environmental factors strongly influence their properties. However, studies on how ecological conditions shape the biochemical characteristics of algal polysaccharides are limited. This study aimed to examine the structural and antioxidant properties of polysaccharides from the brown alga Colpomenia sinuosa collected from Izmir (Aegean Sea, Türkiye) and Canakkale (Canakkale Strait, Türkiye). FTIR, ¹H NMR, XRD, and HPLC analyses showed clear structural differences between the samples. The Izmir extract (PSI) had a branched, amorphous structure, with higher levels of D-glucose and L-fucose contents(p<0.05). The Canakkale extract (PSC) was crystalline and chain-condensed. DPPH scavenging activities were similar (20.40±0.12% in PSI and 20.10±0.31% in PSC; p>0.05). PCA and correlation heatmap analyses showed that salinity correlated positively with glucose (r=0.9988) and antioxidant activity. These results demonstrate that environmental conditions, salinity, affect the biochemical properties of C. sinuosa. Our results showed that the amorphous PSI extract may be suitable for antioxidant or pharmaceutical use, while the crystalline PSC extract can be used for structural applications. Future studies should investigate the effects of seasonal and environmental conditions on the polysaccharide composition of this species.