Citation: LU Xu, ZHANG Yi, WU Xiao-Ting, GUO Ze-Bin, LIN Shan, ZHENG Bao-Dong. Effect of Specific Structure of Lotus Seed Oligosaccharides on the Production of Short-chain Fatty Acids by Bifidobacterium adolescentis[J]. Chinese Journal of Structural Chemistry, ;2015, 34(4): 510-522. doi: 10.14102/j.cnki.0254-5861.2011-0521
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In order to study the structure of lotus (Nelumbo nucifera Gaertn) seed oligosaccharides and their effect on the proliferation of Bifidobacterium adolescentis, we extracted the oligosaccharides from seeds collected from Jianning County, China. We preliminarily characterized the groups, molecular weights, molecular formulae, component monosaccharides and glycosidic bonds using mass spectrometry (MS) and nuclear magnetic resonance (NMR) after isolation and purification. The lotus seed oligosaccharides contained glycosidic bonds Manp-(1→), Galp-(1→), α(1→6)-Glup and α(1→6)-Manp; and mannose was the chief component monosaccharide. NMR analyses showed that α-glycosidic bonds and pyranoid rings were predominant in the oligosaccharides. The MS analyses showed that lotus seed oligosaccharides consisted of three oligosaccharides of different polymerization degree, with relative molecular weights of 342, 504 and 666 Da, and corresponding molecular formulae C12H22O11, C18H32O16 and C24H42O21. Research on the effect of lotus seed oligosaccharides on the proliferation of B. adolescentis showed that they effectively promoted the production of acetic, propionic and butyric acids by B. adolescentis through fermentation, and their effect was stronger than that of fructo-, xylo- and isomalto-oligosaccharides. Lotus seed oligosaccharides have potential as a new functional probiotic and lotus seeds should be further explored and utilized as a source of oligosaccharides.
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