Nutritional quality of some wild leafy vegetables in South Africa
Nutritional quality of some wild leafy vegetables in South Africa
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DOI：
10.1080/09637480701777928
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发表时间：
2009-01-01
影响因子：
3.9
通讯作者：
Jimoh, F. O.
中科院分区：
文献类型：
--
作者：
Afolayan, A. J.;Jimoh, F. O.
野生蔬菜在世界不同地区居民的饮食中发挥着重要作用。南非的野菜有藜、桑葚、龙葵和荨麻。对这些植物的叶子的营养价值、抗营养成分和多酚含量进行了分析。其叶片的蛋白质含量为13.25%至26.44%，纤维和矿物质（灰分）含量分别为16.08-23.08%和13.0-27.75%。 U. urens 含有最高浓度的钙、钾、磷和锌。在 S. asper 中观察到高含量的铁。研究发现这些值与菠菜、生菜和卷心菜等常用蔬菜的值相当或更高。总酚含量范围为4.58至10.53mg/g。从抗营养原理来看，所有蔬菜的植酸、生物碱和皂苷含量均较低。考虑到蔬菜中可用矿物元素的含量，这些植物可能对南非人民的饮食有宝贵且重要的贡献。
Wild vegetables play an important role in the diet of inhabitants of different parts of the world. Among the wild vegetables of South Africa are Chenopodium album, Sonchus asper, Solanum nigrum and Urtica urens. The leaves of these plants were analysed for their nutritive value, anti-nutritive components and polyphenolic contents. The protein contents of their leaves ranged between 13.25% and 26.44%, while the fibre and mineral (ash) contents were 16.08-23.08% and 13.0-27.75%, respectively. U. urens contained the highest concentrations of calcium, potassium, phosphorus and zinc. A high level of iron was observed in S. asper. These values were found to be comparable with or higher than those of commonly used vegetables such as spinach, lettuce and cabbage. The total phenolic contents ranged between 4.58 and 10.53 mg/g. In terms of anti-nutritional principles, all the vegetables had comparatively lower concentrations of phytate, alkaloids and saponins. Considering the amount of available mineral elements in the vegetables, these plants could be valuable and important contributors to the diets of the people in South Africa.