Qi Shunyao, Zeng Tiexin, Wu Peiling, Sun Le, Dong Zhengqi, Xu Lijia, Xiao Peigen
Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Food Chem X. 2024 May 7;22:101446. doi: 10.1016/j.fochx.2024.101446. eCollection 2024 Jun 30.
The bitter and astringent taste and miscellaneous smell of vine tea prevent its further development. In this study, we used a processing technology that mimics yellow tea to improve the flavor of vine tea and revealed its internal reasons through metabolomics. Sensory evaluation showed the yellowing process for 6-12 h reduced the bitterness and astringency significantly, and enriched the aroma. The improvement of taste was mainly related to the down-regulation of anthocyanins (54.83-97.38%), the hydrolysis of gallated catechins (34.80-47.81%) and flavonol glycosides (18.56-44.96%), and the subsequent accumulation of d-glucose (33.68-78.04%) and gallic acid (220.96-252.09%). For aroma, increase of total volatile metabolite content (23.88-25.44%) and key compounds like geraniol (239.32-275.21%) induced the changes. These results identified the positive effects of yellowing process on improvements in vine tea flavor and the key compounds that contribute to these changes.
藤茶的苦涩味和杂味阻碍了其进一步发展。在本研究中,我们采用了模拟黄茶的加工工艺来改善藤茶的风味,并通过代谢组学揭示其内在原因。感官评价表明,6 - 12小时的闷黄过程显著降低了苦涩味,并丰富了香气。口感的改善主要与花青素下调(54.83 - 97.38%)、没食子酰化儿茶素(34.80 - 47.81%)和黄酮醇苷(18.56 - 44.96%)的水解以及随后d - 葡萄糖(33.68 - 78.04%)和没食子酸(220.96 - 252.09%)的积累有关。对于香气,总挥发性代谢物含量增加(23.88 - 25.44%)以及香叶醇等关键化合物增加(239.32 - 275.21%)引发了这些变化。这些结果确定了闷黄过程对藤茶风味改善的积极作用以及促成这些变化的关键化合物。