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The blood orange is a variety of orange (''Citrus × sinensis'') with crimson, almost-blood-colored flesh. The fruit is roughly the same size as an average orange, but sometimes can be smaller or larger; its skin is usually pitted, but can be smooth. The distinctive dark flesh color is due to the presence of anthocyanins, a family of antioxidant pigments common to many flowers and fruit, but uncommon in citrus fruits. Chrysanthemin (cyanidin 3-O glucoside) is the main compound found in red oranges.〔Influence of glucose on cyanidin 3-glucoside absorption in rats. Felgines C1, Texier O, Besson C, Vitaglione P, Lamaison JL, Fogliano V, Scalbert A, Vanella L and Galvano F, Mol Nutr Food Res., August 2008, volume 52, issue 8, pages 959-964, , 〕 The flesh develops its characteristic maroon color when the fruit develops with low temperatures during the night.〔 Sometimes there is dark coloring on the exterior of the rind as well, depending on the variety of blood orange. The skin can be tougher and harder to peel than that of other oranges. Blood oranges have a unique flavor profile compared to other oranges, being distinctly raspberry-like in addition to the usual citrus notes.〔 The blood orange is a natural mutation of the orange, which is itself a hybrid, probably between the pomelo and the tangerine, Within Europe, the ''Arancia Rossa di Sicilia'' (Red Orange of Sicily) has Protected Geographical Status. ==Cultivars== The three most common types of blood oranges are the Tarocco (native to Italy), the Sanguinello (native to Spain), and the Moro, the newest variety of the three. Other less common types include Maltese, Khanpur, Washington Sanguine, Ruby Blood, Sanguina Doble Fina, Delfino, Red Valencia, Burris blood Valencia orange, Vaccaro blood orange, Sanguine grosse ronde, Entre Fina blood orange and Sanguinello a pignu. The Maltese is known to be the sweetest. While also pigmented, Cara cara navels and Vainiglia Sanguignos have pigmentation based on lycopene, not anthocyanins like blood oranges.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Blood orange」の詳細全文を読む スポンサード リンク
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