Some growth and metabolic characteristics of monensin-sensitive and monensin-resistant strains of Prevotella (Bacteroides) ruminicola
Article Abstract:
The effects of monensin on two monensin-sensitive and two monensin-resistant strains of Prevotella ruminicola were examined to evaluate the possible effects of monensin in ruminants. Monensin resistance did not confer a univeral resistance to other ionophores. Logarithmic cultures of monensin-sensitive strains were not inhibited by the same concentration of monensin as freshly inoculated cultures. The rate of glucose utilization as well as protein yields decreased in both types of strains upon monensin challenge. Except for one resistant strain, challenge with monensin raised succinate production at the expense of acetate and propionate.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1992
User Contributions:
Comment about this article or add new information about this topic:
Glycogen formation by the ruminal bacterium Prevotella ruminicola
Article Abstract:
The ratio of glycogen to protein in the ruminal bacteria Prevotella ruminicola was found to be relatively low during exponential growth. However, when cell growth slowed during the transition to the stationary phase, the ratio increased. Glycogen accumulation in glucose-grown cells was threefold lower than that in maltose-grown cells. In continuous cultures provided with maltose, much less glycogen was synthesized at high than at low dilution rates, where maltose was limiting. These findings show that glycogen synthesis was stimulated at low growth rates and was also affected by the growth substrate.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Role of phosphorolytic cleavage in cellobiose and cellodextrin metabolism by the ruminal bacterium Prevotella ruminicola
Article Abstract:
The phosphorolytic cleavage of cellobiose and cellodextrin is studied to determine its role in the bacterial metabolism by the ruminal bacterium Prevotella ruminicola. Results show that phosphorolytic cleavage of cellobiose and cellodextrin leads to the formation of phosphorylated glucosyl molecules without the investment of ATP. The data also suggest that cellobiose hydrolytic cleavage activity is threefold greater than phosphorolytic cleavage activity.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Isolation and characterization of a variety of microcystins from seven strains of the cyanobacterial genus Anabaena
- Abstracts: Phenotypic and molecular characterization of SerD, a dominant allele of the Drosophila gene Serrate. The enhancer of split complex and adjacent genes in the 96F region of Drosophila melanogaster are required for segregation of neural and epidermal progenitor cells
- Abstracts: Isolation and characterization of an acidophilic, heterotrophic bacterium capable of oxidizing ferrous iron. Enumeration and characterization of acidophilic microorganisms isolated from a pilot plant stirred-tank bioleaching operation
- Abstracts: Comparison of contact angles and adhesion to hexadecane of urogenital, dairy, and poultry Lactobacilli: effect of serial culture passages