Structure and effect on<i>Bifidobacterium longum</i>of exopolysaccharide produced by<i>Weissella cibaria</i>using cost-effective substrates

Abstract Maize straw, an abundant agricultural residue, has potential as eco-friendly resource. The aim of this study was to investigate the structure and effect on Bifidobacterium longum exopolysaccharide produced by Weissella cibaria using maize straw a carbon source. In work, exopolysaccharide-producing strain isolated from vegetable juice, which identified W. cibaria. Our results demonstrated that is linear glucan containing α-1,6 glycosidic bond with molecular weight 9462 Da. addition, scanning electron microscopy revealed flake structures. vitro assays showed ability stimulate proliferation B. its metabolism produce acetic acid. This work provides scientific reference for application new insight into source exopolysaccharide.