Functional compounds in fermented buckwheat sprouts. Biosci Biotechnol Biochem
ABSTRACT Fermented buckwheat sprouts (FBS) are used as multifunctional foods. Their production process includes fermentation with lactic acid bacteria. The major strains were found to include Lactobacillus plantarum, Lactobacillus brevis, Lactobacillus pentosus, Lactococcus lactis subsp. lactis, and Pediococcus pentosaceus in an investigation of the lactic acid bacteria. We searched for the functional components, and nicotianamine (NA) and 2″-hydroxynicotianamine (HNA) were identified as angiotensin I-converting enzyme (ACE) inhibitors. NA and HNA increased during fermentation. Indole-3-ethanol was identified as an antioxidant (a SOD active substance), and may have been generated from tryptophan during fermentation because it was not contained in green buckwheat juice. A safety test demonstrated that FBS contained were safe functional food components, showing negative results in buckwheat allergy tests. Any buckwheat allergy substances might have been degraded during the fermentation process.
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ABSTRACT: In this study, the impact of fermentation of Fagopyrum esculentum (buckwheat) by Lactobacillus delbrueckii subsp. lactis was investigated. The interaction between starter culture and buckwheat dough matrix was evaluated with respect to microbial count, final pH, organic acids, total phenolic content and antioxidant potential. An increase of one log cycle from 8.76 to 9.92 log CFU(Colony Forming Unit)/g was observed during fermentation. Lactic acid content increased up to 1350 μg/g within 24 h of fermentation. The most significant result of this study was an observed increase in the total phenolic content of the dough, from 2.73 to 7.64 mg GAE(Gallic Acid Equivalence)/g. Antioxidant potential of fermented buckwheat also showed an increased percentage of 2,2-diphenyl-2-picrylhydrazyl scavenging activity from 44.32% to 88.98% and ferric reducing antioxidant power potential increased from 14.43 to 25.68 μM Fe(II)/g after 72 h of fermentation. We conclude that lactic acid fermentation of buckwheat dough has a potential to be a functional food, with enhanced antioxidant activity.International Journal of Food Sciences and Nutrition 07/2012; DOI:10.3109/09637486.2012.710891 · 1.20 Impact Factor
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ABSTRACT: The purpose of this study was to investigate the effects of yeast polysaccharide (YPS) on growth and flavonoid accumulation in sprout cultures of Fagopyrum tataricum (tartary buckwheat). Without obvious change in the appearance of the sprouts, the exogenous YPS notably stimulated the production of functional metabolites in F. tataricum sprouts, and the stimulation effect was concentration-dependent. With 400 mg/L of YPS applied to the sprout cultures on day 6, the total rutin and quercentin content was effectively increased to 42.8 mg/gdw, or about 1.4-fold in comparison with the control of 31.2 mg/gdw. Feeding with 800 mg/L of YPS on day 9, the sprouts biomass was increased by about 8% compared to the control culture (0.99 gdw/100 sprouts versus 0.92 gdw/100 sprouts). Moreover, the present study revealed that the accumulation of these bioactive metabolites resulted from the stimulation of the phenylpropanoid pathway by YPS treatment. It could be an effective strategy for improving the functional quality of the F. tataricum sprouts provided with YPS.Molecules 12/2012; 17(10):11335-45. DOI:10.3390/molecules171011335 · 2.42 Impact Factor
- Edible Medicinal And Non-Medicinal Plants, 01/2013: pages 459-493; , ISBN: 978-94-007-5652-6