Potential of Inulin-Fructooligosaccharides Extract Produced from Red Onion (Allium cepa var. viviparum (Metz) Mansf.) as an Alternative Prebiotic Product

Red onion is a popular ingredient in many Thai dishes and has recently been promoted for commercial cultivation. In this study, inulin-fructooligosaccharides (inulin-FOSs) were extracted from red onions in a simplified extraction method. The extract contained 24.00 ± 0.38 g/L free glucose, fructose...

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Published in:Plants (Basel) 2021-11, Vol.10 (11), p.2401
Main Authors: Aisara, Jakkrit, Wongputtisin, Pairote, Deejing, Somkid, Maneewong, Chutamas, Unban, Kridsada, Khanongnuch, Chartchai, Kosma, Paul, Blaukopf, Markus, Kanpiengjai, Apinun
Format: Article
Language:English
Subjects:
Allium cepa viviparum
Bacteria
Batch culture
bifidogenic effect
Carbohydrates
Degree of polymerization
Enzymes
Feces
Fermentation
Fructooligosaccharides
Glucose
Inulin
Lactobacilli
Microorganisms
Mixed culture
Onions
Prebiotics
Probiotics
red onion
Sucrose
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Summary:Red onion is a popular ingredient in many Thai dishes and has recently been promoted for commercial cultivation. In this study, inulin-fructooligosaccharides (inulin-FOSs) were extracted from red onions in a simplified extraction method. The extract contained 24.00 ± 0.38 g/L free glucose, fructose and sucrose, while the level of FOSs was recorded at 74.0 ± 2.80 g/L with a degree of polymerization of 4.1. The extract was resistant to simulated gastrointestinal conditions, while selectively promoting probiotic lactobacilli. These outcomes resulted in inhibitory effects against various pathogenic bacteria. The in vitro batch culture fermentation of the extract by natural mixed culture indicated that an unknown sugar identified as neokestose was more rapidly fermented than 1-kestose and other longer-chain inulin-FOSs. Notably, neokestose selectively encouraged a bifidogenic effect, specifically in terms of the growth of Bifidobacteirum breve, which is an infant-type probiotic bacterium. This is the first report to state that neokestose could selectively enhance the bifidogenic effect. In summary, inulin-FOSs extract should be recognized as a multifunctional ingredient that can offer benefits in food and pharmaceutical applications.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants10112401