Sweet potato (Ipomoea batatas L.) leaves as nutritional and functional foods
2014
Sun, Hongnan | Mu, Taihua | Xi, Lisha | Zhang, Miao | Chen, Jingwang
In this study, the nutritional compositions of leaves from 40 sweet potato (Ipomoea batatas L.) cultivars were assessed. The correlations between antioxidant activity and crude protein, crude fat, crude fiber, carbohydrate, and polyphenol contents were determined. The crude protein, crude fiber, crude fat, carbohydrate and ash contents ranged between 16.69–31.08, 9.15–14.26, 2.08–5.28, 42.03–61.36, and 7.39–14.66g/100gdryweight(DW), respectively. According to the index of nutritional quality, sweet potato leaves are good sources of protein, fiber, and minerals, especially K, P, Ca, Mg, Fe, Mn, and Cu. The correlation coefficient between antioxidant activity and total polyphenol content was the highest (0.76032, p<0.0001), indicating that polyphenols are important antioxidants in sweet potato leaves. Sweet potato leaves, which contain several nutrients and bioactive compounds, should be consumed as leafy vegetables in an attempt to reduce malnutrition, especially in developing countries.
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