酢だいだい、辺塚だいだいが含有するフラボノイド類、クマリン類、シネフリン含量の特徴

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  • Characteristics of flavonoids, coumarins, and synephrine in sudaidai and hetsukadaidai
  • ス ダイダイ 、 ヘンズカ ダイダイ ガ ガンユウ スル フラボノイドルイ 、 クマリンルイ 、 シネフリン ガンリョウ ノ トクチョウ

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In this study, we examined the characteristics of flavonoids, courmarins, and synephrine in sudaidai and hetsukadaidai, the sour citrus fruits of local special products. The contents of the compounds in juice and peel of sudaidai (scientific name unclear), hetsukadaidai (unclear), daidai (Citrus aurantium) and natsudaidai (Citrus natsudaidai) were determined using HPLC, and the quantitative values were analyzed using principal component analysis. The characteristics of the compounds in the juice and peel of sudaidai resembled those of daidai, and those of hetsukadaidai were different from those of daidai and natsudaidai, based on the scatter diagrams of the score plots. The scientific name of sudaidai was suggested to be the same as daidai (<i>Citrus aurantium</i>). Auraptene, an antitumor compound, was found in the peel of hetsukadaidai, although it was not found in daidai and occurred at lower content than in natsudaidai. It was abundant in the flavedo (epicarp) of hetsukadaidai. Synephrine, an adrenergic phenethylamine, was found in sudaidai at level comparable with that in daidai, although it was found at lower content in hetsukadaidai than in daidai. The antioxidative activity of the peel and juice of daidai and sudaidai was significantly higher than that of hetsukadaidai and natsudaidai (p<0.05). The activity of the albedo (mesocarp) of hetsukadaidai was significantly higher than other regions of the fruit (p<0.05). The activity was shown to have a positive correlation with the content of the antioxidant neoeriocitrin and the correlation coefficient (R) was high (R>0.9).

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