تاثیر بتا-فروکتان استخراج شده از ریشه شنگ بر رشد بیفیدوباکتریوم بیفیدوم و اشرشیاکلی در شرایط آزمایشگاهی

Bifidogenic prebiotics fructans contain inulin, oligofructose and fructooligosaccharides. the aim of this study was to evaluate in vitro effectiveness, short chain b-fructans extracted from salsify root (scsf). effect of scsf on growth and activity of bifidobacterium bifidum and e.coli was evaluated in concentrations of 0.5, 1, 2, 3% (w/v) during the 48 hours incubation period and it was compared with commercial inulin (hp-inulin). the results indicated that utilization of b(2?1) fructans by bifidobacterium bifidum depended on the dp of fructo-oligomeric chains and these bacteria significantly utilized scsf with short chain (lower dp) better than hp-inulin with higher dp (p < 0.05). also, in the case of both bacteria growth, no differences were observed between medium containing 2% and 3% (w/v) hp-inulin and medium without hp-inulin (p > 0.05). therefore, it can be concluded that hp-inulin at concentrations 2% and 3% (w/v) was not fermented by these bacteria, whereas supplementation with 0.5% and 1% (w/v) hp-inulin was found to be effective on bacteria growth (p < 0.05). also, the effects of scsf (2% w/v) in growing of bifidobacterium bifidum were significantly higher than that for escherichia coli (p < 0.05).