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Fucoidan in Some Indian Brown Seaweeds Found along the Coast Gulf of Mannar

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Author(s): T. Eluvakkal | S.R. Sivakumar | K. Arunkumar

Journal: International Journal of Botany
ISSN 1811-9700

Volume: 6;
Issue: 2;
Start page: 176;
Date: 2010;
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Keywords: Tamilnadu | Rameswaram | bioactivity | L-fucose | Phaeophyceae | India

ABSTRACT
Fucoidan is a hetero-polymer of sulfated L-fucose extracted from brown seaweeds, sea urchin, sea cucumber etc. that display diverse bioactivity. In this investigation, yield, total carbohydrate, L-fucose and sulphate content of crude fucoidan extracted from 11 abundantly occurring brown seaweeds along the coast of Gulf of Mannar (Rameswaram regions), India were evaluated by adopting two different methods. A maximum amount of crude fucoidan was recorded from Sargassum wightii (7.15 % alga dry wt.) followed by Dictyota dichotoma, Turbinaria ornata, T. conoides, T. decurrens, Sargassum myriocystum, S. ilicifolium, S. marginatum, Padina boergesenii, P. gymnospora and Stoechospermum marginatum (2.13% alga dry wt.). Highest L-fucose content of 232.5 mg g-1 dry crude fucoidan (23.25% in crude fucoidan ) was extracted in Sargassum wightii among the 11 seaweeds studied. Maximum sulphate content of 98.7 mg g-1 dry crude fucoidan (9.87% in crude fucoidan ) was also recorded in Sargassum wightii. A method that yield maximum crude fucoidan constitute less L-fucose whereas the other method that extracted low crude fucoidan constitute high L-fucose content. Some of the brown seaweeds occurring along the coast of Gulf of Mannar contained potential yield of fucoidan. The yield and quality of fucoidan extracted from seaweeds were depending on the method followed for the extraction. The yield of fucoidan was varied among the brown seaweeds likely to be species specific.
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