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KMID : 1024420150190040403
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Food Engineering Progress
2015 Volume.19 No. 4 p.403 ~ p.407
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The Effect of High Pressure Hormesis on Pterostilbene Content and Biological Activity in Blueberries
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Kim Tae-Eun
Hong Ji-Young
Cho Yong-Jin
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Abstract
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This study was performed to investigate the enrichment of pterostilbene content and improvement of biological activity in harvested blueberries through the modulation of metabolism with high pressure treatment at hormetic doses. After harvested blueberries were pressurized under 2, 10, and 20 MPa for 5 min at 25 oC along with a set of control, pterostilbene content and induction of quinone reductase activity were observed. As a result, the content of pterostilbene in high pressure treated blueberries was enriched up to 1.33 times while quinone reductase activity was improved compared to the untreated sample. These results suggest that a mild high pressure treatment can enrich pterostilbene content and improve biological activity in harvested blueberries according to hormetic response.
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KEYWORD
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high pressure , hormesis , blueberry , pterostilbene , biological activity
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