| Title: | Improving flavor of summer Keemun black tea by solid-state fermentation using Cordyceps militaris revealed by LC/MS-based metabolomics and GC/MS analysis |
| Author(s): | Zhang YY; Zhang P; Le MM; Qi Y; Yang Z; Hu FL; Ling TJ; Bao GH; |
| Address: | "Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China. Research Center on Entomogenous Fungi, Engineering Research Center of Fungal Biotechnology Ministry of Education, Anhui Agricultural University, Hefei 230036, China. Electronic address: darlinglee@ahau.edu.cn. Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China. Electronic address: lingtj@ahau.edu.cn. Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China. Electronic address: baoguanhu@ahau.edu.cn" |
| DOI: | 10.1016/j.foodchem.2022.135172 |
| ISSN/ISBN: | 1873-7072 (Electronic) 0308-8146 (Linking) |
| Abstract: | "Cordyceps militaris (C. militaris) has been approved and widely used in healthy food. The present study aimed to improve the flavor of summer Keemun black tea (KBT) using C. militaris solid-state fermentation. Combined with sensory evaluation, the volatile and non-volatile components of solid-state fermentation of KBT (SSF-KBT) and KBT were analyzed. The results showed that after the solid-state fermentation, the contents of total polyphenol, total flavonoid, and total free amino acids were significantly reduced. Further non-targeted metabolomics analysis revealed that the contents of non-galloylated catechins and d-mannitol increased, while the galloylated catechins and flavonoid glycosides decreased as did the bitterness and astringency of KBT. Dihydro-beta-ionone and beta-ionone (OAV = 59321.97 and 8154.17) were the aroma-active compounds imparting woody and floral odors in SSF-KBT, respectively. Current study provides a new avenue to develop summer-autumn KBT" |
| Keywords: | "Tea/chemistry *Cordyceps Fermentation *Camellia sinensis/chemistry Flavonoids *Catechin/analysis Metabolomics (+)-gallocatechin (GC, PubChem CID65084) (-)-Epigallocatechin gallate (EGCG, PubChem CID65064) (-)-epicatechin (EC, PubChem CID72276) (-)-epicate;" |
| Notes: | "MedlineZhang, Yuan-Yuan Zhang, Peng Le, Miao-Miao Qi, Yan Yang, Zi Hu, Feng-Lin Ling, Tie-Jun Bao, Guan-Hu eng England 2022/12/13 Food Chem. 2023 May 1; 407:135172. doi: 10.1016/j.foodchem.2022.135172. Epub 2022 Dec 9" |
