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The blood orange is a variety of orange (Citrus × sinensis) with crimson, almost blood-colored flesh.
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. The flesh develops its characteristic maroon color when the fruit develops with low temperatures during the night. Sometimes, dark coloring is seen 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 compared to other oranges, being distinctly raspberry-like in addition to the usual citrus notes.A ripe blood orange
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. In the Land of Valencia, it was introduced in the second half of the 19th century.Contents
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', 'Vaccaro', 'Sanguine grosse ronde', 'Entre Fina', 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.Moro
The 'Moro' is the most colorful of the blood oranges, with a deep red flesh and a rind with a bright red blush. The flavor is stronger and the aroma is more intense than a normal orange. This fruit has a distinct, sweet flavor with a hint of raspberry. This orange is more bitter than the 'Tarocco' or the 'Sanguinello'. The 'Moro' variety is believed to have originated at the beginning of the 19th century in the citrus-growing area around Lentini (in the Province of Siracusa in Sicily) as a bud mutation of the "Sanguinello Moscato". The 'Moro' is a "deep blood orange", meaning that the flesh ranges from orange-veined with ruby coloration, to vermilion, to vivid crimson, to nearly black.Tarocco Immature 'Moro' blood orange fruit – 7 months from flowering
The name 'Tarocco' is thought to be derived from an exclamation of wonder expressed by the farmer who was shown this fruit by its discoverer. It is a medium-sized fruit and is perhaps the sweetest and most flavorful of the three types. The most popular table orange in Italy, it is thought to have derived from a mutation of the 'Sanguinello'. It is referred to as "half-blood", because the flesh is not accentuated in red pigmentation as much as with the 'Moro' and 'Sanguinello' varieties. It has thin orange skin, slightly blushed in red tones. The 'Tarocco' is one of the world's most popular oranges because of its sweetness (Brix to acid ratio is generally above 12.0) and juiciness. It has the highest vitamin C content of any orange variety grown in the world, mainly on account of the fertile soil surrounding Mount Etna, and it is easy to peel. The 'Tarocco' orange is seedless.
The University of California, Riverside Citrus Variety Collection has delineated three subcultivars of 'Tarocco'. The 'Bream Tarocco', which was originally donated by Robert Bream of Lindsay, California, is of medium to large fruit with few to no seeds. 'Tarocco #7', or 'CRC 3596 Tarocco', is known for its flavor, but has a rind with little to no coloration. The 'Thermal Tarocco' was donated by A. Newcomb of Thermal Plaza Nursery in Thermal, California.Sanguinello A glass of Sanguinello juice
The 'Sanguinello' /sæŋɡwɪˈnɛloʊ/, also called 'Sanguinelli' in the US (the plural form of its name in Italian), discovered in Spain in 1929, has a reddish skin, few seeds, and a sweet and tender flesh. 'Sanguinello', the Sicilian late "full-blood" orange, is close in characteristics to the 'Moro'. Where grown in the Northern Hemisphere, it matures in February, but can remain on trees unharvested until April. Fruit can last until the end of May. The peel is compact, and clear yellow with a red tinge. The flesh is orange with multiple blood-colored streaks.History and background A slice of blood orange upside-down cake Jars of blood orange marmalade
Blood oranges may have originated in either China or the southern Mediterranean, where they have been grown since the 18th century. They are now the primary orange grown in Italy. The anthocyanins which give the orange its distinct maroon color will only develop when temperatures are low at night, as during the Mediterranean fall and winter. Blood oranges cultivated in the United States are in season from December to March (Texas), and from November to May (California).As a food
Blood oranges' red pigment anthocyanin is an antioxidant. The pigments begin accumulating in the vesicles at the edges of the segments and at the blossom end of the fruit, and continue accumulating in cold storage after harvest. Due to its pigments, the blood orange contain greater amounts of antioxidants than other oranges.
Some blood orange juice may be somewhat tart, while other kinds are sweet while retaining the characteristic blood orange taste. The oranges can also be used to create marmalade, and the zest can be used for baking. A popular Sicilian winter salad is made with sliced blood oranges, sliced bulb fennel, and olive oil. The oranges have also been used to create gelato, sorbet, and Italian soda. Blood oranges are also popular in vinaigrette-style dressings, and are sometimes used to flavor niche-market beer.
Blood oranges are a source of vitamin C like all citrus fruits. Oranges can also be a valuable source of folate, calcium, and thiamine. It is also sometimes used in a cocktail called SPRITZ, with Prosecco and Aperol.References