Seasonal variation in non-volatile flavor substances of fresh tea leaves (Camellia sinensis) by integrated lipidomics and metabolomics using UHPLC-Q-Exactive mass spectrometry
文献类型: 外文期刊
作者: Chen, Le;Zhang, Shan;Feng, Yuning;Jiang, Yongwen;Yuan, Haibo;Shan, Xujiang;Zhang, Qianting;Niu, Linchi;Wang, Shengnan;Zhou, Qinghua;Li, Jia
作者机构:
关键词: Fresh tea leaves;Seasonal variation;Lipidomics;Metabolomics;Black tea;Flavor quality
期刊名称: FOOD CHEMISTRY
ISSN: 0308-8146
年卷期: 2024 年 462 卷
页码:
收录情况: SCIE(2024版) ; ; EI(2024版)
摘要: Harvest season exerts great influence on tea quality. Herein, the variations in non-volatile flavor substances in spring and summer fresh tea leaves of four varieties were comprehensively investigated by integrating UHPLC-Q-Exactive based lipidomics and metabolomics. A total of 327 lipids and 99 metabolites were detected, among which, 221 and 58 molecules were significantly differential. The molecular species of phospholipids, glycolipids and acylglycerolipids showed most prominent and structure-dependent seasonal changes, relating to polar head, unsaturation and total acyl length. Particularly, spring tea contained higher amount in aroma precursors of highly unsaturated glycolipids and phosphatidic acids. The contents of umami-enhancing amino acids and phenolic acids, e.g., theanine, theogallin and gallotannins, were increased in spring. Besides, catechins, theaflavins, theasinensins and flavone/flavonol glycosides showed diverse changes. These phytochemical differences covered key aroma precursors, tastants and colorants, and may confer superior flavor of black tea processed using spring leaves, which was verified by sensory evaluation.
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