ArticleMarine biotechnology (New York, N.Y.)2026
Application of Seaweed-Derived Polysaccharides in Biocrust Technology: Ultrasound-Assisted Fucoidan Extraction from Laminaria digitata.
Article in Marine biotechnology (New York, N.Y.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Fucoidan, a polysaccharide derived from brown seaweed, exhibits significant potential as a natural ingredient with a multitude of health benefits due to its non-toxic properties, biodegradability, and extensive range of applications. This study aimed to optimize the extraction of fucoidan from brown seaweed (Laminaria digitata) and its application as a structural support for enhanced biocrust establishment. Ultrasound-assisted extraction of fucoidan was carried out using a 0.1 M hydrochloric acid. The extraction conditions were optimized using a Box–Behnken design with three parameters. The extraction time of 6.3 min, extraction temperature of 50 °C, and a liquid-to-solid ratio of 15 mL/g were obtained as the optimal conditions. Under these optimal conditions, the yield of fucoidan was 5.20 ± 0.32 g/100 g dry matter. The proposed isolation procedure proved to be more effective compared to conventional extraction where the fucoidan yield was 2.92 ± 0.11 g/100 g dry matter. The viscosity-average molecular weight of fucoidan isolated using ultrasound-assisted extraction was approximately 289.01 kDa with a sulfate content of 19%, whereas conventional extraction yielded a higher molecular weight (420.25 kDa) but lower sulfate content (17%). The results of the hydration properties and biocrust growth suggest that fucoidan could be used to significantly enhance cyanobacterial biomass production and provide structural support for development of the biocrusts. This highlights its potential as a practical tool for accelerating restoration of degraded soils and the preventing erosion.
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