Mineral composition of blueberries (Vaccinium corymbosum) cultivated in the northeast region of Argentina
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Asociación Iberoamericana de Tecnología Postcosecha, S.C.
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Essential mineral elements for the human body are present in the fruits. Its content varies between countries and is affected by climatic conditions, soil conditions and agricultural practices. In Argentina, one of the crops that has gained interest is the blueberry. However, little is known about its mineral content. Contents of mineral nutrients were evaluated from eight blueberry varieties (Vaccinium corymbosum) from Northeast Argentinian Region and analyze the contribution of these fruits in Dietary Reference Intakes (DRIs), recommended by the Food and Drug Administration. The evaluated minerals were: calcium, magnesium, potassium, iron, zinc, copper, and manganese in the varieties Jewel, Misty, Star, Emerald, Snowchaser, O'Neal, Springhigh and San Joaquín. The content of each mineral depended on the variety. The concentration range of calcium was 54.738-206.104 mg/100 g; magnesium, 31.527-63.025 mg/100 g; potassium, 417.650-1073.058 mg/100 g; iron, 3.274-7.518 mg/100 g; zinc, 1.245-2.761 mg/100 g; copper, 0.470-1.137 mg/100 g and manganese, 0.656-5.163 mg/100 g. The contribution of these minerals to the DRIs for adults was for calcium 4.2-15.8 %, magnesium 7.5-15.0 %; potassium 8.9-22.8 %; iron 18.2-41.8 %; zinc 11.3-25.1 %; copper 52.2-127.3 % and manganese 28.5-224.5 %. In conclusion, the blueberries could be nutritionally qualified as an excellent source of manganese, iron and copper and a valuable source of zinc, potassium, magnesium and calcium.
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