Β-glucooligosaccharides derived from barley β-glucan promote growth of lactic acid bacteria and enhance nisin Z secretion by Lactococcus lactis. (March 2020)

• Record Type: Journal Article
• Authors: Lee, Jong Min; Jang, Won Je; Lee, Eun-Woo; Kong, In-Soo
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 122(2020)
• Publication Date: 2020-03
• Subjects: β-glucooligosaccharides -- Barley β-glucan -- Prebiotics -- Synbiotics -- Nisin; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2020.109014
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: The present study assessed the effects of β-glucooligosaccharides (β-GOS) derived from barley β-glucan on the proliferation and antimicrobial activity of probiotics. All cocci examined in this study and several species of Lactobacilli and bifidobacteria were able to utilize β-GOS as a sole carbon source. In addition, the absence of significant growth of certain pathogens on β-GOS compared to prebiotics fructo-oligosaccharide (FOS) and inulin substrates demonstrates the probiotic specificity of β-GOS metabolism. Increased anti-microbial activities were observed in Lactococcus lactis subsp. lactis, Lactobacillus reuteri, and Pediococcus acidilactici grown in media with β-GOS as the sole carbon source over glucose. β-GOS enabled sustained L . lactis subsp. lactis growth in the exponential phase, resulting in an approximately 25% increase in nisin Z production compared with glucose. These results suggest that β-GOS can selectively modulate probiotic growth in particular cocci, and antimicrobial activity, with important implications for future research in nutrition as well as industrial applications. Highlights: Hydrolysates of barley β-glucan, β-GOS, are composed of tri- and tetraose. β-GOS was the preferred substrate for certain probiotics but not for pathogens. β-GOS culture increased nisin Z productivity in L. lactis subsp. lactis by 25%.