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KMID : 0861020150300010011
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Korea Journal of Herbology
2015 Volume.30 No. 1 p.11 ~ p.18
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Antioxidant Activity and Component Change of Steaming-Drying and Fermented Gastrodiae Rhizoma
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Doh Eun-Soo
Yoo Ji-Hyun
Kill Ki-Jung
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Abstract
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Objectives : The objective of this study is to evaluate antioxidant activity and the main component content change of steaming-drying fermented Gastrodiae rhizoma extract.
Methods : The antioxidant activities were determined for total polyphenol, flavonoid contents, SOD-like activity, electron donating activity, nitrite scavenging ability and major functional components(gastrodin and 4-hydroxybenzyl alcohol content) were also measured.
Results : The polyphenol content of fermented Gastrodiae rhizoma by S. cerevisiae were higher than those of fermented Gastrodiae rhizoma by A. oryzae, and when the fermentation period is extended. SOD like activity of fermented Gastrodiae rhizoma showed to be increased by fermentation with S. cerevisiae than fermentation by A. oryzae. Electron donating activity of fermented Gastrodiae rhizoma were increased at almost parallel level as vitamin C, by fermentation. Notably, fermentation by A. oryzae was moderately better than fermentation by S. cerevisiae. Flavonoid content of Gastrodiae rhizoma showed to increasing by fermentation, particularly fermentation by S. cerevisiae was proven to be more effective than by A. oryzae. The more steaming-drying or increased period of fermentation would be resulted in more gastrodin contents but under the same conditions, 4-hydroxybenzyl alcohol content of fermentation by A. oryzae in case of steaming and drying 1 time and 3 time was higher than control.
Conclusions : These results has strongly hint the possible applicability of fermentation might be effective to improve the diverse biological activities of Gastrodiae rhizoma and may further supports to develop a functional food materials.
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KEYWORD
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Gastrodiae rhizoma, Fermentation, Stem-dried, Antioxidation, Components
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