Polyphenolic Profile, Sugar Consumption and Organic Acids Generation along Fermentation of Infusions from Guava (Pisidium guajava) by the Kombucha Consortium
MARTHA ROCO MORENO-JIMNEZ, NURIA ELIZABETH ROCHA-GUZMN, JOSGUADALUPE RUTIAGA-QUIONES, DANIELA MEDRANO-NEZ, JUAN ANTONIO ROJAS-CONTRERAS, RUBN FRANCISCO GONZLEZ-LAREDO, JOSALBERTO GALLE
The kombucha beverage is usually prepared from black tea, with sucrose, inoculated with previously fermented liquid broth and/or tea fungus pellicle, and incubated. Alternative sources have been used for kombucha beverages. Guava leaves have been used for a long time as traditional medicine. It is found in many commercially available botanical supplements in the form of decoction, milled and used as comprises. They are rich in polyphenolic compounds. Several changes are produced during the fermentation of the beverages. The main objective of the present work is to characterize the fermentation process of guava leaves infusions by kombucha and studying possible chemical changes in their polyphenolic profile. Infusions from guava leaves were prepared and fermented by the kombucha consortium. The pH, titrable acidity, polyphenolic compounds, sugar consumption, organic acid along the fermentation was made by UPLC-ESI-MS. Kombucha from Camellia sinensis (CS) was made as a control. A higher rate of sucrose consumption was observed for Kombucha made with CS; also, higher production of organic acids (acetic and succinic acid) was observed too. Both behaviors were related to the content of glucose. The flavan-3-ols were diminishing along the fermentation time, with the exception of epigallocatechin in Camellia sinensis, Flavan-3-ol content in Guava leaves was low. Higher content of dicaffeoyl quinnic acid was observed for both systems in special for CS, falling after a maximum peak; minor constituents of hydroxycinnamic acids were stable along the fermentation for both systems.
Keywords: fermentation, guava leaves, kombucha, polyphenols
Citation: Recent Research in Science and Technology , 10: 16-22doi: 10.25081/rrst.2018.10.3399http://updatepublishing.com/journal/index.php/rrst/
Study Mailing Address:
Facultad de Ingeniera en Tecnologa de la Madera. Universidad Michoacana de San Nicols de Hidalgo. Apartado Postal 580. 58000 Morelia, Michoacn. Mxico
Date Updated: March 12, 2020