Population dynamics of hydrocarbon-oxidizing yeasts introduced into oil-contaminated soils
- Institute of Microbiology, Moscow (Russian Federation)
- Moscow State Univ. (Russian Federation)
A pure culture of the yeastlike fungus Candida lipolytica, able to actively degrade crude oil, was isolated. In preliminary trials, an optimal dose for its introduction was adjusted (10{sup 8} cells/g soil) to ensure its predominance in contaminated soil. Laboratory incubation experiments in which the population dynamics of the introduced species and indigenous soil bacteria and the dynamics of soil respiration activity were followed showed that active proliferation of the introduced species in soil is accompanied by its elimination as a result of grazing by microfauna. The most favorable conditions for the development of introduced yeasts were found to be provided in gray and gray forest soil, whereas in soddy-podzolic soil, their growth and oil degradation were retarded. The obtained results indicate that introduction of the tested culture can significantly increase the rate of oil degradation. In uncontaminated soil, the introduced species is rapidly eliminated. 9 refs., 5 figs.
- OSTI ID:
- 146509
- Journal Information:
- Microbiology (New York), Vol. 64, Issue 5; Other Information: PBD: Sep-Oct 1995; TN: Translated from Mikrobiologiya; 64: No. 5, 668-673(1995)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Biodegradation of aromatic hydrocarbons in an extremely acidic environment
Differential sensitivity of aerobic gram-positive and gram-negative microorganisms to 2,4,6-trinitrotoluene (TNT) leads to dissimilar growth and TNT transformation: Results of soil and pure culture studies