The effect of a methanogen, Methanobrevibacter smithii, on the growth rate, organic acid production, and specific ATP activity of three predominant ruminal cellulolytic bacteria.
Three predominant ruminal cellulolytic organisms, Fibrobacter succinogenes S85, Ruminococcus albus 8, and R. flavefaciens FD-1, were cultured with a methanogen, Methanobrevibacter smithii. Growth rates, bacterial protein, organic acids, and methane production were measured. When grown in diculture with the methanogen, a fermentative advantage was observed with F. succinogenes S85 as seen by an increase in specific rate of ATP production and organic acid concentration. The introduction of the methanogen did not improve the growth rate, organic acid yield, or specific rate of ATP production for R. albus 8. The growth rate and amount of organic acid end products increased when R. flavefaciens FD-1 was cultured with the methanogen; however, the specific activity of ATP production did not increase.
Rychlik
J L
JL
Molecular Biology Program, Department of Animal and Range Sciences, P.O. Box 30003, Campus Box 3I, New Mexico State University, Las Cruces, NM 88003-0003, USA.
May
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D000255:Adenosine Triphosphate / Q000378:metabolism*; D000818:Animals; D001419:Bacteria / Q000254:growth & development* / Q000378:metabolism; D002455:Cell Division; D002482:Cellulose / Q000378:metabolism*; D018920:Coculture Techniques; D005227:Fatty Acids / Q000378:metabolism*; D008697:Methane / Q000378:metabolism; D017013:Methanobacteriaceae / Q000254:growth & development* / Q000378:metabolism; D012417:Rumen / Q000382:microbiology; D013997:Time Factors
D005227:Fatty Acids; D000255:Adenosine Triphosphate; D002482:Cellulose; D008697:Methane