文章基本信息

标题：Nutritional Metabolites of Red Pigmented Lettuce ( Lactuca sativa) Germplasm and Correlations with Selected Phenotypic Characters
本地全文：下载
作者：Awraris Derbie Assefa ; On-Sook Hur ; Bum-Soo Hahn 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2021
卷号：10
期号：10
DOI：10.3390/foods10102504
语种：English
出版社：MDPI Publishing
摘要：Lettuce is an important dietary source of bioactive phytochemicals. Screening and identification of the health beneficial metabolites and evaluating the relationships with phenotypic characters can help consumers adjust their preferences for lettuce plant types. Thus, we explored the major health-beneficial individual metabolites and antioxidant potential of 113 red pigmented lettuce leaf samples. A UV–Vis spectrophotometer and UPLC-DAD-QTOF/MS (TQ/MS) instruments were used for the identification and quantification of metabolites and antioxidant activity accordingly. The metabolites were quantified against their corresponding external standards. The contents of metabolites varied significantly among lettuce samples. Cyanidin 3- O-(6″- O-malonyl)glucoside (4.7~5013.6 μg/g DW), 2,3-di- O-caffeoyltartaric acid (337.1~19,957.2 μg/g DW), and quercetin 3- O-(6″- O-malonyl)glucoside (45.4~31,121.0 μg/g DW) were the most dominant in red pigmented lettuce samples among anthocyanins, hydroxycinnamoyl derivatives, and flavonols, respectively. Lettuces with dark and very dark red pigmented leaves, circular leaf shape, a strong degree of leaf undulation, and highly dense leaf incisions were found to have high levels of flavonoids and hydroxycinnamoyl derivatives. Principal component analysis was used to investigate similarities and/or differences between samples, and the partial least square discriminant analysis classified them into known groups. The key variables that contributed highly were determined. Our report provides critical data on the bioactive constituents of red pigmented lettuce to breeders developing varieties with enhanced bioactive compounds and to nutraceutical companies developing nutrient dense foods and pharmaceutical formulations.
关键词：enLactuca sativa;UPLC-DAD-QTOF/MS;phenolic compounds;anthocyanins;hydroxycinnamoyl derivatives;flavones;flavonols;PCA;PLS-DA;phenotypic characters