Aerobic and anaerobic growth of rifampin-resistant denitrifying bacteria in soil

The growth and survival of several rifampin-resistant isolates of denitrifying bacteria were examined under anaerobic (denitrifying) and aerobic conditions. Two isolates added to nonsterile Bruno soil at densities of between 10(4) and 10(6) CFU g dry soil-1 exhibited an initial period of growth foll...

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Bibliographic Details
Published in:Applied and Environmental Microbiology 1990-02, Vol.56 (2), p.323-328
Main Authors: Murray, R.E. (University of Kentucky, Lexington, KY), Parsons, L.L, Smith, M.S
Format: Article
Language:English
Subjects:
Aerobiosis
ANAEROBIOSE
ANAEROBIOSIS
ANTIBIOTICOS
ANTIBIOTIQUE
BACTERIA
Bacteria - drug effects
Bacteria - genetics
Bacteria - growth & development
BACTERIE
Bacteriology
Biological and medical sciences
CRECIMIENTO
CROISSANCE
DENITRIFICACION
DENITRIFICATION
Drug Resistance, Microbial
FLORA DEL SUELO
FLORE DU SOL
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation, Bacterial
Genotype
Glucose - metabolism
MEDICAMENT
MEDICAMENTOS
Metabolism. Enzymes
Microbiology
MICROORGANISME
MICROORGANISMOS
Mutation
Nitrogen - metabolism
RESISTANCE AUX PRODUITS CHIMIQUES
RESISTENCIA QUIMICA
Rifampin - pharmacology
Soil Microbiology
SUPERVIVENCIA
SURVIE
TIPOS DE SUELO
TYPE DE SOL
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Summary:The growth and survival of several rifampin-resistant isolates of denitrifying bacteria were examined under anaerobic (denitrifying) and aerobic conditions. Two isolates added to nonsterile Bruno soil at densities of between 10(4) and 10(6) CFU g dry soil-1 exhibited an initial period of growth followed by a gradual decline in numbers. After 28 days, both isolates maintained viable populations of between 10(4) and 10(5) CFU g dry soil-1 under both denitrifying and aerobic conditions. One of the isolates consistently grew better under denitrifying conditions, and the other isolate consistently grew better under aerobic conditions. The relative pattern of denitrifying versus aerobic growth for each organism was not affected by the addition of glucose. The growth yields of the two isolates varied with soil type, but the relative pattern of denitrifying versus aerobic growth was consistent in three soils with greatly different properties. Five of nine isolates introduced into Bruno soil at low population densities (approximately 10(5) CFU g dry soil-1) exhibited better growth after 2 days under denitrifying conditions. It was not possible to predict the prevalence of the denitrifying or aerobic mode of growth in nonsterile soil from the growth characteristics of the isolates in pure cultures or sterile soil
ISSN:0099-2240
1098-5336
DOI:10.1128/aem.56.2.323-328.1990