Premium
The effect of Aspergillus oryzae fermentation extract on the growth of fungi and ciliate protozoa in the rumen
Author(s) -
Newbold C.J.,
Brock R.,
Wallace R.J.
Publication year - 1992
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.1992.tb00739.x
Subject(s) - rumen , aspergillus oryzae , biology , fermentation , protozoa , bacteria , microbiology and biotechnology , population , food science , digestion (alchemy) , botany , chemistry , demography , genetics , chromatography , sociology
When added to the diet of sheep, 2 g/d, Aspergillus oryzae fermentation extract (AO) stimulated total and cellulolytic bacterial numbers in rumen fluid by 34 and 90% respectively. AO had no effect on the numbers of protozoa or fungal zoospores. AO did not affect hydrogen production by the rumen fungi Neocallimastix frontalis (RE1), N. patriciarum (CX) or Piromonas communis (P) in pure culture or protozoal activity in vitro , estimated from the rate of breakdown of [ 14 C] leucine‐labelled Selenomonas ruminantium. It was concluded that increases in ruminal fibre digestion observed previously in animals fed AO, were most likely due to a stimulation of bacteria rather than eukaryotes in the rumen microbial population.