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Lecture14 - Rumen Bacteria Click HERE to display a larger...

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Rumen Bacteria Click HERE to display a larger version of the table, which can be printed
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Rumen Bacteria Most common cellulose digesting bacteria include: Bacteroides succinogenes – possesses an extracellular cellulase which is released from the cell and diffuses in the rumen fluid. Ruminococcus flavenfaciens (C, HC) Ruminococcus albus (C, HC) – the cellulase produced by this bacteria is a complex of several enzymes with specific function in the stepwise degradation of cellulose to glucose Butyrivibrio fibrisolvens (C, HC, P, NH3 Prod.) Cellulose Utilizers
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Rumen Bacteria Most common hemicellulose digesting bacteria include: Butyrivibrio fibrisolvens (C, HC, P, NH3 Prod.) possesses an extracellular pectinolytic enzyme which is an exopectate lyase. This enzyme cleaves the pectin chain at the terminal end. Bacteroides ruminicola (HC, S, P, NH3 Prod.) Ruminococcus spp. (C,HC) Hemicellulose Utilizers
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Rumen Bacteria Most common amylolytic (starch) digesting bacteria include: Bacteroides amylophilus (S,P) Streptococcus bovis (S,P) Succinimonas amylolytica Bacteroides ruminicola (HC, S, P, NH3 Prod.) These bacteria usually tend to predominate in the rumen when high starch diets are fed, except those such as Bacteroides ruminicola which degrade other substrates. The degradation of starch by these bacteria involves an extracellular alpha -amylase which cleaves randomly along the starch chain. Amylolytic (Starch) Utilizers
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Rumen Microbiology Intermediate Acid-Utilizing Bacteria Carry out secondary fermentation of the end-products of other rumen bacteria.
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