Impact of Various Microbial-Fermented Methods on the Chemical Profile of Dark Tea Using a Single Raw Tea Material
文献类型： 外文期刊
作者： Shi, Jiang 1 ; Ma, Wanjun 1 ; Wang, Chuanpi 3 ; Wu, Wenliang 1 ; Tian, Jun 5 ; Zhang, Yue 1 ; Shi, Yali 1 ; Wang, Jiatong 1 ;
作者机构： 1.Chinese Acad Agr Sci, Tea Res Inst, Key Lab Tea Biol & Resource Utilizat, Minist Agr, Hangzhou 310008, Peoples R China
2.Chinese Acad Agr Sci, Grad Sch, Beijing 100081, Peoples R China
3.Greentown Agr Testing Technol Co Ltd, Hangzhou 310052, Peoples R China
4.Hunan Acad Agr Sci, Tea Res Inst, Changsha 410125, Peoples R China
5.Kunming Colourful Yunnan King Shine Tea Ind Co Lt, Kunming 650501, Yunnan, Peoples R China
关键词： dark tea; Camellia sinensis; widely targeted metabolomics; metabolic profile; microbial fermentation; glycosylated flavonoid
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：4.192； 五年影响因子：4.289 ）
ISSN： 0021-8561
年卷期： 2021 年 69 卷 14 期
页码：
收录情况： SCI
摘要： In the present study, we produced Pu-erh, Liubao, Qingzhuan, and Fuzhuan teas using a single raw tea material and applied widely targeted metabolomics to study the impact of various microbial-fermented methods on the chemical profile of dark tea. The contents of catechins and free amino acids decreased drastically, whereas the contents of gallic acid and theabrownins increased significantly during microbial fermentation. Pu-erh tea had the highest content of theabrownins (11.82 +/- 0.49%). Moreover, MS-based metabolomics analysis revealed that the different types of dark teas were significantly different from their raw material. A total of 85 differential metabolites were screened among 569 metabolites identified referring to self-compiled database. Glycosylated, hydroxylated, methylated, and condensed and oxidated products originating from microbial bioconversion of their corresponding primitive forms were significantly increased in dark teas. These results suggest that various microbial-fermented methods greatly affect the metabolic profile of dark tea, which can provide useful information for dark tea biochemistry research.
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