Comparison of Biological Activities in Sargassum siliquanstrum Fermented by Isolated Lactic Acid Bacteria

다국어 초록 (Multilingual Abstract)

Brown alga Sargassum siliquanstrum was fermented by isolated lactic acid bacteria including Weissella sp. SH-1, Lactobacillus sp. SH-1, Leuconostoc sp. SH-1, and Streptococcus sp. SH-1, which could efficiently utilize its biologically active materials. Total polyphenol contents, total flavonoid contents and angiotensin converting enzyme inhibitory activities were measured after confirmation of pH and 2,2-diphenylpicrylhydrazyl (DPPH) radical scavenging activities. pH and DPPH radical scavenging activities plateaued after 2 days fermentation for each bacterium. Fermentation without algal debris showed better biological activities than fermentation with debris.
Fermentation increased DPPH radical scavenging activities from 3.13% to 16.85% compared with non-fermented condition, with Lactobacillus sp. SH-1 being the most efficient. Weissella sp. SH-1 and Leuconostoc sp. SH-1 increased total polyphenol contents by 18.43% and total flavonoid contents by 5.70%, respectively, compared with non-fermented condition. Fermentation by Lactobacillus sp. SH-1 showed the highest angiotensin converting enzyme inhibitory activity (73.93%). Biological activities of S. siliquanstrum were upgraded by isolated lactic acid bacteria, which might be exploited in the development of functional materials or healthy drink products.

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