Biotechnology Bulletin ›› 2015, Vol. 31 ›› Issue (6): 144-150.doi: 10.13560/j.cnki.biotech.bull.1985.2015.06.023

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Effects of Galactooligosaccharide on Exopolysaccharide Produced by Intestinal Probiotics

Xin Yueqiang, Liang Rongrong, Wang Ruiming   

  1. Department of Biotechnology,Qilu University of Technology,Key Laboratory for Microbial Engineering in Shandong Province,Ji'nan 250353
  • Received:2014-10-19 Online:2015-06-19 Published:2015-06-20

Abstract: The aim of the study is to investigate the effects of galactooligosaccharide on the yield of exopolysaccharides produced by intestinal probiotics. Using galactooligosaccharide, glucose, galactose and lactose as carbon sources, the utilization of carbon sources, the yield and varieties of exopolysaccharides and the adhesion of harmful bacteria were studied. Results indicated that galactooligosaccharide not only promoted reproduction of Bifidobacterium longum and Lactobacillus plantarum, but also improved the yield of exopolysaccharides with 208.78 μg/mL and 192.78 μg/mL respectively. Varieties of exopolysaccharides produced while using galactooligosaccharide as carbon source were more than other 3 ones, and the adhesion to harmful bacteria such as Escherichia coli was obvious. It is proved that galactooligosaccharide could promote B. longum and L. plantarum to produce more exopolysaccharides compared with the other 3 carbon sources.

Key words: galactooligosaccharide, exopolysaccharide, intestinal probiotics

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