Leibniz Institute of Vegetable and Ornamental Crops, Theodor‑Echtermeyer‑Weg 1, 14979 Großbeeren, Germany.
Institute of Food Chemistry, Hamburg School of Food Science, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany.
Food Chem. 2018 Nov 30;267:376-386. doi: 10.1016/j.foodchem.2017.11.043. Epub 2017 Nov 11.
Amaranth species are globally grown food crops. However, knowledge about the composition of their secondary metabolites is insufficient. Here, selected hydroxycinnamic acid derivatives, flavonoid glycosides, carotenoids and chlorophylls in the leaves of 14 genotypes from six different amaranth species were identified and quantified. For the first time, caffeic acid esters of isocitric and several aldaric acids were isolated and quantified in a leafy food matrix. High concentrations of hydroxycinnamic acid derivatives and chlorophylls, and moderate amounts of flavonoids and carotenoids were detected. A hierarchical clustering method of the metabolic profiles followed by Random Amplification of Polymorphic DNA (RAPD)-PCR fingerprinting was used to group the genotypes. Using this combined approach, three main groups of amaranth species were assigned. The information provided in this study increases the attractiveness of the amaranth genus as a food crop due to its strong diversity of plant secondary metabolites that are associated with numerous health-promoting benefits.
苋菜属植物是全球广泛种植的粮食作物。然而，人们对其次生代谢产物的组成知之甚少。本研究中，对来自六个不同苋菜属种的 14 个基因型的叶片中的选定羟基肉桂酸衍生物、类黄酮糖苷、类胡萝卜素和叶绿素进行了鉴定和定量分析。首次在叶类食物基质中分离和定量了异柠檬酸和几种醛酸的咖啡酸酯。检测到高浓度的羟基肉桂酸衍生物和叶绿素，以及中等浓度的类黄酮和类胡萝卜素。采用代谢图谱的层次聚类方法，随后进行随机扩增多态性 DNA（RAPD）-PCR 指纹图谱分析，对基因型进行分组。使用这种组合方法，将苋菜属植物分为三个主要组。本研究提供的信息增加了苋菜属作为粮食作物的吸引力，因为其具有丰富的植物次生代谢产物多样性，与许多促进健康的益处有关。
