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Advisor(s)
Abstract(s)
Four types of purified xylooligosaccharides (XOS) from several lignocellulosic materials, showing different
structural features (including chain length, branching, and linkage types), obtained from different feedstocks
(Eucalyptus globuluswood, rice husks,wheat bran or barley wastes), were assessed (using fructooligosaccharides
as reference substrate) for their effects on the growth of six different probiotic Lactobacillus strains in basal MRS
media and survival in different simulated gastrointestinal tract (GIT) conditions. The hydrophobicity of bacterial
cells, which measures their potential for epithelial adhesion, was also evaluated. Improved growth of Lactobacillus
strains was observed for media containing XOS as the single source of carbohydrate, confirming their role as
prebiotics. These oligosaccharides also led to improvement in the resistance of the target Lactobacillus to the
simulated GIT environment. The enhancement of the survival rates depended on the type of oligosaccharide.
This is the first comparative study of the effects in lactobacilli involving four types of XOS obtained from different
lignocellulosic materials. The obtained results show that these oligosaccharides manufactured from alternative
sources could be interesting prebiotic substrates with different structures in comparison with the available
commercially and with interesting potential towards the development of synbiotic products.
Description
Keywords
Prebiotic Lactobacillus Synbiotic Oligosaccharides Lignocellulosic materials Gastrointestinal tract
Pedagogical Context
Citation
GULLÓN, Patrícia ...[et al.] - Effects of hemicellulose-derived saccharides on behavior of Lactobacilli under simulated gastrointestinal conditions. Food Research International. ISSN 0963-9969. Vol. 64 (2014), p. 880–888
Publisher
Elsevier