ABSTRACT

Studies proving the food properties of some vegetable species are still incipient. Aiming to obtain deeper knowledge about the nutritional potentials, the scope of this work was to characterise the food compounds of interest, present in vegetables known as unconventional, in Brazil, and to group these species according to their chemical and nutritional similarities. Eight nutritional characteristics were evaluated in 10 species of unconventional vegetables, and representative samples of leaves, flowers and flower buds were collected. All species studied presented varying levels of nutritional compounds of interest, such as antioxidant activity, vitamin C, phenolics, proteins, lipids, and carbohydrates. There was great variation in the nutritional composition among the structures, species, and varieties analysed, which were organised into groups of nutritional similarities. The species Tropaeolum majus (leaves), Amaranthus hybridus and Stachys byzantina presented the highest values for antioxidant activity, phenolics, vitamin C, caloric value, carbohydrates and proteins, and, therefore, were characterised as an isolated group in a dendrogram.

摘要

证明某些蔬菜的食品特性的研究仍处于初期阶段。为了更深入地了解营养潜力，这项工作的范围是表征巴西非常规蔬菜中存在的目标食物化合物，并根据其化学和营养相似性对这些物种进行分组。在10种非常规蔬菜中评估了8种营养特性，并收集了叶子，花朵和花蕾的代表性样品。所有研究的物种均表现出不同水平的目标营养化合物，例如抗氧化活性，维生素C，酚类，蛋白质，脂质和碳水化合物。在所分析的结构，物种和品种之间，营养成分差异很大，它们被组织成营养相似的组。种类Tropaeolum majus（叶），Amaranthus hybridus和Stachys byzantina呈现出最高的抗氧化活性，酚类，维生素C，热值，碳水化合物和蛋白质值，因此被表征为树状图中的一个独立基团。