Effect of extracellular hydrogen on organic acid utilization by the ruminal bacterium Selenomonas ruminantium
| Autor: | Chung-Myeon Park, Scott A. Martin |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Fumaric acid
Rumen Carboxylic acid Malates Applied Microbiology and Biotechnology Microbiology chemistry.chemical_compound Fumarates Gram-Negative Bacteria Animals Selenomonas ruminantium Lactic Acid chemistry.chemical_classification Aspartic Acid General Medicine Metabolism Growth Inhibitors Lactic acid Culture Media chemistry Biochemistry Fermentation Lactates Malic acid Organic acid Hydrogen |
| Zdroj: | Current microbiology. 32(6) |
| ISSN: | 0343-8651 |
| Popis: | The objective of this study was to evaluate the effect of extracellular H2 on organic acid utilization by two lactate-utilizing strains of Selenomonas ruminantium (HD4, H18). Both strains were able to grow (optical density at 600 nm ≥ after 9 h) on either aspartate, fumarate, or malate in the presence of 1 atmosphere (atm) of H2. Succinate was the major end product produced in these fermentations. When cells were incubated with lactate plus 1 atm H2, growth was minimal and little lactate was fermented. The electron transport inhibitor, acriflavine, was a strong inhibitor of growth when either strain was incubated in the presence of organic acid plus H2. Compared with glucose- or lactate-grown cells, cellular carbohydrate levels were lower for both strains in cells grown on either organic acid plus H2. These results suggest that electron transport plays a role in organic acid utilization by S. ruminantium. |
| Databáze: | OpenAIRE |
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