Go to Top Go to Bottom
Asian-Australas J Anim Sci > Volume 5(3); 1992 > Article
Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1992;5(3): 511-517.
DOI: https://doi.org/10.5713/ajas.1992.511    Published online September 1, 1992.
Necessity of ready electron disposal and interspecies hydrogen transfer for the utilization on ethanol by rumen bacteria
T. Hino, H. Mukunoki, K. Imanishi, K. Miyazaki
Abstract
Ethanol was utilized by mixed rumen microbes, but addition of pentachlorophenol (25 mg/l), a methanogen inhibitor, suppressed the utilization of ethanol. Carbon monoxide (50% of the gas phase), a hydrogenase inhibitor, more strongly suppressed the utilization of ethanol, propanol, and butanol. These results suggest that the major ethanol utilizers are H2 producers. Ethanol utilization was depressed at low pH (below 6.0). Since methanogens were shown to be relatively resistant to low pH, it appears that ethanol utilizers are particularly sensitive to low pH. Ruminococcus albus and R. flavefaciens in mono-culture of these bacteria with methanogens resulted in the utilization of ethanol, i.e., when H2 was rapidly converted to CH4, R. albus and R. flavefaciens utilized ethanol. These results suggest that ethanol is utilized when the electrons liberated by the oxidation of ethanol are rapidly removed, and ready electron disposal in ethanol-utilizing, H2-producing bacteria is accomplished by the interspecies transfer of H2.
Keywords: Rumen Microbes; Ethanol; Interspecies Hydrogen Transfer
TOOLS
METRICS Graph View
  • 11 Crossref
  •  0 Scopus
  • 1,964 View
  • 11 Download
Related articles


Editorial Office
Asian-Australasian Association of Animal Production Societies(AAAP)
Room 708 Sammo Sporex, 23, Sillim-ro 59-gil, Gwanak-gu, Seoul 08776, Korea   
TEL : +82-2-888-6558    FAX : +82-2-888-6559   
E-mail : jongkha@hotmail.com               

Copyright © 2019 by Asian-Australasian Journal of Animal Sciences. All rights reserved.

Close layer
prev next