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Effects of Eurotium cristatum Fermentation on Tartary Buckwheat Leaf Tea: Sensory Analysis, Volatile Compounds, Non-Volatile Profile and Antioxidant Activity.
- Source :
- Fermentation (Basel); Jul2024, Vol. 10 Issue 7, p369, 17p
- Publication Year :
- 2024
-
Abstract
- Background: Eurotium cristatum (E. cristatum) is the probiotic fungus in Fu-brick tea, with which fermentation brings a unique flavor and taste and health-promoting effects. Tartary buckwheat leaves are rich in functional active substances such as flavonoids and phenolic compounds, yet are not effectively utilized. Methods: Tartary buckwheat leaves were processed into raw green tea first and subsequently fermented with E. cristatum to develop a novel fermented leaf tea. The tea quality was evaluated by the aspects of the sensory scores by E-tongue, the volatile compounds by HS-SPME-GC-MS, the non-volatile profile by biochemical and UPLC-MS/MS methods and the antioxidant activity by the colorimetric assay. Results: Fermented leaf tea displayed a golden yellow color, a unique "flower" aroma and a dark-tea taste, with an improved sensory acceptability. Fermentation raised the content of volatile heterocyclic and aromatic compounds, alkenes and other aromatic components, which produced a unique floral flavor. The proportion of sour, bitter and astringency accounting non-volatile compounds such as phenolic acids and amino acids decreased, while the proportion of umami and sweet accounting substances such as responsible amino acids increased. Fermented leaf tea displayed a relative stronger total antioxidant activity against ABTS. Conclusion: E. cristatum fermentation exerted positive effects on Tartary buckwheat leaf tea quality. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23115637
- Volume :
- 10
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Fermentation (Basel)
- Publication Type :
- Academic Journal
- Accession number :
- 178693764
- Full Text :
- https://doi.org/10.3390/fermentation10070369