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KMID : 1134820100390010099
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Journal of the Korean Society of Food Science and Nutrition
2010 Volume.39 No. 1 p.99 ~ p.104
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Physiological Activities of Suaeda japonica Extracts on Harvest Season
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Choi Jong-Il
Kim Yeon-Joo
Kim Jae-Hun
Kwon Joong-Ho
Ahn Dong-Huyn
Chun Byung-soo
Lee Ju-Woon
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Abstract
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This study was conducted to investigate the physiological activities of extracts from Suaeda japonica harvested in different season for its possibility as a functional material in food or cosmetic composition. The total mineral content of S. japonica harvested in summer was about 89.8 g/㎏, and it comprised a little more content than one in winter (86.7 g/㎏). The Na content of S. japonica did not show a remarkable contrast on harvest season whereas the K and Ca contents of summer were decreased to half or increased to double in winter. In addition, the antioxidative activity of each extract from S. japonica changed depending on harvest season. For S. japonica harvested in summer, the ethyl acetate extract showed the highest DPPH radical scavenging activity, but in winter the butanol extract fraction had the highest value. However, FRAP values were the highest in butanol extracts from S. japonica harvested in summer and winter. Total phenolic contents in the extracts were in proportion to the antioxidative activities. From the tyrosinase inhibition assay and melanogenesis with B16BL6, the hexane extracts from both seasons had shown the highest whitening effects. These results suggest that the extraction methods should be optimized depending on harvest season to utilize the S. japonica as functional component source.
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KEYWORD
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Suaeda japonica, physiological activity, seasonal variation, mineral, whitening effect
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