Next Article in Journal
Effects of the Starch Molecular Structures in Barley Malts and Rice Adjuncts on Brewing Performance
Next Article in Special Issue
Enhanced Production and Quantitative Evaluation of Nigericin from the Algerian Soil-Living Streptomyces youssoufiensis SF10 Strain
Previous Article in Journal / Special Issue
Biotransformation of Ganoderic Acid A to 3-O-Acetyl Ganoderic Acid A by Soil-isolated Streptomyces sp.
Open AccessArticle

Bioconversion of Kaempferol and Quercetin Glucosides from Plant Sources Using Rhizopus spp.

1
Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University—Campus Kortrijk, Graaf Karel de Goedelaan 5, 8500 Kortrijk, Belgium
2
Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
3
Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
*
Author to whom correspondence should be addressed.
Fermentation 2018, 4(4), 102; https://doi.org/10.3390/fermentation4040102
Received: 30 October 2018 / Revised: 29 November 2018 / Accepted: 3 December 2018 / Published: 7 December 2018
(This article belongs to the Special Issue Fermentation and Bioactive Metabolites)
Fermentation with filamentous fungi is known for the ability to convert bioactive compounds. The aim of this research was to investigate the metabolism of glycosidic derivatives of kaempferol and quercetin during fungal fermentation of extracts from cauliflower outer leaves and onion by Rhizopus oryzae and R. azygosporus. The highest release of kaempferol and quercetin was observed after 2 days and 1 day of fermentation with R. oryzae, respectively. It was proposed that glycosidic compounds were initially deglycosylated to form kaempferol-3-glucoside and quercetin-3-glucoside and then further metabolized into their aglycones. Clear differences in conversion efficiency towards the aglycones were observed between the two Rhizopus strains. Although both flavonoids only differ in one hydroxyl group, the metabolism of the glycosides towards their respective aglycones, kaempferol or quercetin, was different. It is concluded that the fermentation with R. oryzae and R. azygosporus could be considered as a way to produce kaempferol and quercetin aglycone from their glycosidic derivatives. View Full-Text
Keywords: fungi; bioconversion; kaempferol; quercetin; aglycone; flavonoids; vegetable by-products fungi; bioconversion; kaempferol; quercetin; aglycone; flavonoids; vegetable by-products
Show Figures

Graphical abstract

MDPI and ACS Style

Huynh, N.T.; Smagghe, G.; Gonzales, G.B.; Van Camp, J.; Raes, K. Bioconversion of Kaempferol and Quercetin Glucosides from Plant Sources Using Rhizopus spp.. Fermentation 2018, 4, 102.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop