文献类型： 外文期刊

作者： Zhou, Jinping ¹ ; Chen, Laifeng ¹ ; Zhang, Fan ² ; Foo, Hooiling ³ ; Cao, Zhenhui ⁵ ; Lin, Qiuye ¹ ;

作者机构： 1.Yunnan Agr Univ, Coll Food Sci & Technol, Kunming 650201, Peoples R China

2.Hunan Acad Agr Sci, Tea Res Inst, Changsha 410125, Peoples R China

3.Univ Putra Malaysia, Fac Biotechnol & Biomol Sci, Dept Bioproc Technol, UPM Serdang 43400, Selangor, Malaysia

4.Univ Putra Malaysia, Inst Biosci, Res Lab Probiot & Canc Therapeut, UPM MAKNA Canc Res Lab CANRES, Upm Serdang 43400, Selangor, Malaysia

5.Yunnan Agr Univ, Fac Anim Sci & Technol, Kunming 650201, Peoples R China

关键词： pickled tea; taste quality; physiochemical; antioxidant activity; metabolomics

期刊名称：FOODS （ 影响因子：5.1； 五年影响因子：5.6 ）

ISSN：

年卷期： 2025 年 14 卷 5 期

页码：

收录情况： SCI

摘要： The present study investigated the dynamics changes in physicochemical properties and non-volatile metabolites during Bulang pickled tea fermentation. A combination of artificial sensory evaluation, chemical-physical analysis, ultra performance liquid chromatography coupled with quadrupole/time-of-flight mass spectrometry (UPLC-QTOF-MS), and multivariate statistical analysis were employed to examine the differences among four fermentation stages of Bulang pickled tea. The bitterness, astringency, sweetness after taste, sourness and fermentation taste tended to increase with fermentation. The highest lactic acid bacteria, aerobic bacteria, total titratable acidity, total soluble sugar, total polyphenols, and total flavonoids were recorded at the second month of fermentation, while fungi, total free amino acids, total antioxidant capacity and hydroxyl free radical scavenging capacity increased with fermentation. Mantel test demonstrated significant associations between lactic acid bacteria /fungal communities and taste characteristics. UPLC-QTOF-MS analysis led to the identification of 35 differential non-volatile metabolites, predominantly comprising heterocyclic compounds, organic acids with their derivatives, and flavonoids. Nine non-volatile metabolites are related to antioxidant activity, and morin, malvidin and 7-methylxanthine exhibit relatively strong antioxidant activity. This study provides comprehensive insights into the non-volatile metabolites and antioxidant function of Bulang pickled tea.