Fructooligosaccharides and Xylooligosaccharides Utilization Properties of Lactic Acid Bacteria

Abstract:

The study investigated the preference，generation time and acid production rate of 35 lactic acid bacteria（LAB） using fructooligosaccharide（FOS） and xylooligosaccharide（XOS） in vitro. None of the strains of Lactobacillus rhamnosus，L. acidophilus and Streptococcus thermophilus were able to utilize FOS and XOS in bromocresol purple plate. Eight strains of L. plantarum could take advantage of FOS/XOS，while FOS/XOS could be selectively used by L. brevis，L. casei，L. fermentum，L. casei，L. reuteri and Bifidobacteria. The generation time and acid production rate of LAB were also detected when using FOS or XOS as the sole carbon source. The growth rate of the strains was positively correlated with the acid production rate. The acidification rate of Lactobacillus was generally higher than that of Bifidobacteria. These results demonstrated that the utilization of oligosaccharides by LAB had strain specificity and regularity.