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The Core Role of Bacillus subtilis and Aspergillus fumigatus in Pile-Fermentation Processing of Qingzhuan Brick Tea
- Source :
- Indian Journal of Microbiology. 59:288-294
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- To identify the microorganisms responsible for the formation of the main quality components of Qingzhuan brick tea (QZBT) during solid-state fermentation (SSF), predominant thermoduric strains were isolated from the tea leaves collected during SSF. According to their capability of releasing cellulase, pectase, protease, and polyphenol oxidase, four strains were selected as starter cultures to ferment sun-dried tea leaves during artificially inoculated SSF. According to the major enzymatic activities and quality components content (tea polyphenols, catechins, amino acids, soluble sugar, and theabrownin), it was found that Aspergillus fumigatus M1 had a significant effect on the transformation of polyphenols and Bacillus subtilis X4 could enhance the ability of bioconversion of strain M1. Strain X4 and M1 may be the core microbes responsible for developing these biochemical components of QZBT, as the values of quality components of tea leaves fermented by these two strains for 6 days was very close to that of the sample naturally fermented for 35 days in the tea factory. The results could be significant in developing industrial starters for the manufacture of QZBT and stabilizing the product quality of different batches.
- Subjects :
- 0106 biological sciences
0303 health sciences
biology
030306 microbiology
Bioconversion
Chemistry
food and beverages
Bacillus subtilis
Cellulase
biology.organism_classification
01 natural sciences
Microbiology
Polyphenol oxidase
Aspergillus fumigatus
03 medical and health sciences
Polyphenol
010608 biotechnology
biology.protein
Fermentation
Food science
Sugar
Subjects
Details
- ISSN :
- 09737715 and 00468991
- Volume :
- 59
- Database :
- OpenAIRE
- Journal :
- Indian Journal of Microbiology
- Accession number :
- edsair.doi...........f382df1b2f746f9f675b800c9479b22b