Response surface analysis of the effects of pH and dilution rate on Ruminococcus flavefaciens FD-1 in cellulose-fed continuous culture

Article Abstract:

The effects of pH and dilution rate (D) on the growth of Ruminococcus flavefaciens FD-1 in continuous culture were studied using response surface analysis. Growth yield and cellulose digestion were concomitantly affected by pH and D. Cellulose consumption was more affected by D than by pH. Effects on cell yield showed that the effect of pH increased with increasing D. Soluble sugar concentrations were higher at lower Ds suggesting increased production due to longer retention time. Fermentation products consisted primarily of acetate, succinate and formate. Acetate production effects paralleled those of cellulose consumption and soluble sugar concentration.

Usage, Rumen fermentation, Response surfaces (Statistics)

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Utilization of individual cellodextrins by three predominant ruminal cellulolytic bacteria

Article Abstract:

A study was conducted on the cellodextrin utilization patterns of various cellulolytic species. Fibrobacter succinogenes S85, Ruminococcus flavefaciens FD-1 and Ruminococcus albus 7 were grown in Balch-type anaerobic tubes to determine the utilization patterns. Ruminococcus flavefaciens was found to have the greatest capacity to compete for low concentrations of the cellodextrins.

Bacteria, Dextrins

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Identification of Ruminococcus flavefaciens as the predominant cellulolytic bacterial species of the equine cecum

Article Abstract:

Researchers used oligonucleotide probes to show that Ruminococcus flavefaciens is the most common bacterium in the equine intestinal system that can degrade and ferment plant cellulose. Fibrobacter succinogenes and Ruminococcus albus were also present.

Physiological aspects, Horses, Gastrointestinal system

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