1887

Abstract

SUMMARY Ten isolates belonging to the genus and two each of and an unidentified sp. were isolated from high dilutions of rumen fluid from sheep conditioned to low-protein teff hay. The butyrivibrios solubilized between io and 37 % of the -cellulose of the hay (average 21 %). The two isolates of degraded 43 and 56 % of the -cellulose and the two of 39 and 66 %, while the two Clostridium cultures achieved only 10 % degradation. Hemicellulose degradation by the Butyrivibrio isolates was between 25 and 67 % (mean 48 %) and that by the four Ruminococcus cultures between 47 and 65 %. One of the Clostridium cultures solubilized 21 % and the other 51 % of die hemicellulose. The butyrivibrios appear capable of contributing a greater share towards cellulose digestion in ruminants on low-protein hay than has been inferred from qualitative tests for cellulolysis, using refined cellulose preparations; they are probably less active than the ruminococci.

Loading

Article metrics loading...

/content/journal/micro/10.1099/00221287-55-3-459
1969-03-01
2021-07-28
Loading full text...

Full text loading...

/deliver/fulltext/micro/55/3/mic-55-3-459.html?itemId=/content/journal/micro/10.1099/00221287-55-3-459&mimeType=html&fmt=ahah

References

  1. Bryant M. P., Small N. 1956; The anaerobic monotrichous butyric acid-producing curved rod-shaped bacteria of the rumen. J. Bact 72:16
    [Google Scholar]
  2. Dehority B. A., Scott H. W. 1967; Extent of cellulose and hemicellulose digestion in various forages by pure cultures of rumen bacteria. J. Dairy Sci 50:1136
    [Google Scholar]
  3. Gilchrist F. M. C., Kistner A. 1962; Bacteria of the ovine rumen. I. The composition of the population on a diet of poor teff hay. J. agric. Sci., Camb 59:77
    [Google Scholar]
  4. Gouws L., Kistner A. 1965; Bacteria of the ovine rumen. IV. Effect of change of diet on the predominant type of cellulose-digesting bacteria. J. agric. Sci., Camb 64:51
    [Google Scholar]
  5. Hungate R. E. 1966 The Rumen and its Microbes, 1st ed. New York and London: Academic Press;
    [Google Scholar]
  6. Kistner A., Gouws L. 1964; Cellulolytic cocci occurring in the rumen of sheep conditioned to lucerne hay. J. gen. Microbiol 34:447
    [Google Scholar]
  7. Shane B. S., Gouws L., Kistner A. 1968; Cellulolytic bacteria occurring in the rumen of sheep conditioned to low-protein teff hay. In the Press
    [Google Scholar]
  8. van Gylswyk N. O. 1968 The Cellulolytic Rumen Bacteria of Sheep Fed Supplemented Hay Diets M.Sc. thesis University of Pretoria:
    [Google Scholar]
  9. Wise L. E., Murphy M., D’Addieco A. A. 1946; Chlorite holocellulose, its fractionation and bearing on summative wood analysis and on studies on the hemicelluloses. Paper Trade J 122:35
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journal/micro/10.1099/00221287-55-3-459
Loading
/content/journal/micro/10.1099/00221287-55-3-459
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error