数種アブラナ科スプラウトの抗酸化成分含量および抗酸化能に及ぼす照射光強度の影響(普及・教育・利用)  [in Japanese] Effects of Irradiated Light Intensity on the Amount of Antioxidants and Antioxidative Capacity in Cruciferous Sprouts(Human Issues & Methodology in Horticulture)  [in Japanese]

数種アブラナ科野菜の高機能性スプラウト生産技術を確立するため,抗酸化活性成分含量および抗酸化活性に及ぼす照射光強度の影響について検討した.その結果,栽培中の光強度を高めることで,スプラウトの胚軸長は短くなるものの,フラボノール,アントシアニンおよび総ポリフェノール含量の増加が認められ,抗酸化能(DPPHラジカル補足活性,スーパーオキシド消去活性)も高まった.これらのことから,光を強めた環境で栽培することにより抗酸化活性が高いスプラウトの生産が可能であることが分かった.

This study investigated the effects of irradiated light intensity on the amount of antioxidants and antioxidative capacity in broccoli, mustard, kale, and red cabbage sprouts. Antioxidant concentrations were estimated by quantitating total polyohenol, flavonol, and anthocyanin concentration. Antioxidative capacity was evaluated by measuring DPPH radical absorbing capacity and superoxide scavenging ability. Polyphenol and flavonol concentrations were significantly increased in accordance with the light intensity. Antioxidative activity was also increased with light intensity. However, the lengths of sprout hypocotyls were decreased by strong light. These results indicate that the contents of polyphenol including flavonol are increased by strong light and consequently the antioxidative ability becomes stronger. These findings suggest that strong light irradiation should be useful for producing sprouts with higher antioxidative capacity.