数字农科院2.0

The relationship between bacterial dynamics, phenols and antioxidant capability during compressed white tea storage

文献类型： 外文期刊

作者： Zhihui Wang;Zhihua Wang;Weidong Dai;Yan Huang;Fuming Lin;Haomin Dai;Zhe Zhou;Xingchen Lin;Zhi Lin;Weijiang Sun

作者机构：

关键词： Antioxidant;Bacterial community;Compressed white tea;Long-term storage;Polyphenol

期刊名称： LWT

ISSN： 0023-6438

年卷期： 2023 年 174 卷

页码：

收录情况： SCIE（2023版） ; ; EI（2023版）

摘要： The quality and efficacy of compressed white tea (CWT) can be affected by the bacterial community during its long-term storage. However, it is not clear how bacteria affect the CWT storage process. In this study, 16S rDNA was used to identify the composition and dynamic changes of bacterial community during CWT storage, and chemometrics methods were used to evaluate the relationship between the bacterial community and phenol/antioxidant indices. A total of 31 bacterial phyla and 764 bacterial genera were identified during CWT storage, and their diversity decreased significantly at first and then increased significantly (P < 0.05). The 10th year of storage was the key period for changes in bacterial diversity and dominant phyla and genera. The prediction of phenotype and function revealed that these changes were dominated by aerobic bacteria, which could involved in 264 metabolic pathways, including flavonoids metabolism. Chemometric analysis verified that seven core functional bacteria promoted the decline of eight phenols during CWT storage, thus reducing antioxidant capability. In conclusion, this study reveals that the bacteria in CWT affect its antioxidant capability by altering the phenol content during storage. In addition, 29 biomarkers during CWT storage were screened, which accumulated uniquely in different storage years.

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