Abstract

This study was conducted to evaluate and compare the antioxidant and anti-inflammatory effects of Allium hookeri grown in an outfield and those grown in a plant factory using different lights (FL, fluorescent light; LED-R, red light-emitting diode (LED); LED-B, blue LED; LED-R+B, red+blue LED). The antioxidant effects were determined by measuring the total phenolic content (TPC), DPPH and ABTS radical scavenging activities, and superoxide dismutase (SOD) and catalase (CAT) activities. The anti-inflammatory effects were determined by measuring the inhibition of nitric oxide (NO) production. The results showed that extracts of the leaves of A. hookeri grown in the outfield had the highest TPC value. The A. hookeri leaves grown in the plant factory showed higher antioxidant effects compared to those grown in the outfield as evaluated by the DPPH and ABTS radical scavenging activities and SOD activity. The highest CAT activity was found in the extract of leaves exposed to LED-R+B lights. The viability of RAW264.7 cells cultured with all the extracts of A. hookeri leaves was over 100% compared to that of the media control, and there was no cytotoxicity observed in any of the extracts. The NO production was significantly reduced in all the groups and the inhibitory effects of the A. hookeri leaves were dose-dependent. These results showed that the antioxidant and anti-inflammatory effects of A. hookeri grown in the plant factory using artificial lights are as good as those of the same plants grown in the outfield. Thus, artificial lights may be used to improve the functional characteristics of A. hookeri.

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