CONVERSION OF C14-LABELED SUBSTRATES TO VOLATILE FATTY ACIDS BY RUMEN MICROBIOTA

  • 1 January 1966
    • journal article
    • research article
    • Vol. 14  (6) , 1004-+
Abstract
The fermentation of uniformly labeled glucose-C14, glucose-l-C14, -2-C14, and -6-C14 xylose-l-C14, cellulose-l-C14, -2-c14, and -6-C14, and lactate-2-C14 by rumen fluids from cows fed all-hay, hay and concentrate (50:50), and all-concentrate diets was investigated. The results obtained suggested that the Embden-Meyerhof glycolytic pathway is the major pathway of hexose utilization, that the major pathway of xylose fermentation involves hexose synthesis, and that the contributions of the nonrandomizing (acrylate) pathway of pro-pionate formation during glucose, xylose, and cellulose fermentations are 4.5, 8.0, and 10.5%, and 24.6, 25.8, and 17.2%, respectively, by rumen fluids from the cows fed all-hay and all-concentrate rations.

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