Abstract
The ability of microbial degraders of polycyclic aromatic hydrocarbons to grow at 24°C in liquid mineral medium supplemented with oil as the sole source of carbon and energy was studied. Growth characteristics (CFU) and the level of oil destruction by plasmid-bearing and plasmid-free strains were determined after seven days of cultivation. The presence of catabolic plasmids in the degrader strains, including rhizosphere pseudomonads, was shown to increase cell growth and enhance the level of oil degradation. Strain Pseudomonas chlororaphis BS1391 bearing plasmid pBS216 was found to be the most effective oil degrader.
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