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KMID : 1134820080370121535
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Journal of the Korean Society of Food Science and Nutrition
2008 Volume.37 No. 12 p.1535 ~ p.1541
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Antioxidant Activities of Methanol Extracts from Prunella vulgaris
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Lee Soo-Jung
Sung Nak-Ju
Jeong Hye-Gwang
Shin Jung-Hye
Chung Young-Chul
Seo Jong-Kwon
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Abstract
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The aim of the present study was to investigate the antioxidant activities of methanol extracts from whole plant, flower talk and stem of Hagocho (Prunella vulgaris). Content of total phenolic compound was the highest in flower stalk (77.1 mg/100 g) and those of others were below 54.0 mg/100 g. Flavonoid contents was the highest in stem (36.1 mg/100 g) compared to other samples. Electron donating ability of Prunella vulgaris was activated at over 70% in all samples at 500 μg/mL concentration, especially, the activity was the highest (92.1%) in flower stalk extracts. Reducing power showed similar tendency to electron donating ability, which was significantly higher flower stalk (0.3～1.9), whole plant (0.2～1.6) and stem (0.2～1.5). Hydroxyl radical was scavenged over 80% in 100 μg/mL concentration and was not significantly different between parts. Antioxidant activity in β-carotene-linoleic acid system was 47.5～84.6% when 1,000 g/mLmethanol extracts was added to reaction mixtures, and flower stalk showed the highest activity. Ability of ABTs cation decolorization from Prunella vulgaris was activated over 50% in all samples when 250 μg/mLof methanol extracts was added to reaction mixtures and 500 μg/mL were the most suitable concentrationfor its activation. Nitric oxide scavenging activity was lower under 20%, but its activity was significantlyhigher in flower stalk than other parts. The results indicate that flower stalk from Prunella vulgaris has potent antioxidant activities.
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KEYWORD
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Hagocho (Prunella vulgaris), antioxidant activities
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