Halotolerant bacteria of the genus <Emphasis Type="Italic">Arthrobacter</Emphasis> degrading polycyclic aromatic hydrocarbons |
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Authors: | E G Plotnikova O V Yastrebova L N Anan’ina L V Dorofeeva V Ya Lysanskaya V A Demakov |
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Institution: | 1.Institute of Ecology and Genetics of Microorganisms, Ural Division,Russian Academy of Sciences,Perm,Russia;2.Skryabin Institute of Biochemistry and Physiology of Microorganisms,Russian Academy of Sciences,Pushchino, Moscow oblast,Russia |
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Abstract: | Eight strains of bacteria capable of degrading polycyclic aromatic hydrocarbons have been isolated from soils and bottom sediments
sampled in the region of Verkhnekamskoe potash deposit (Berezniki, Perm krai) and classified with the genus Arthrobacter on the basis of phylogenetic analysis (16S rRNA genes) and morphological and chemotaxonomic characters. According to the
results of 16S rDNA sequence alignment, strains B905, SMB11, SMB145, SF27, and DF14 show the highest sequence homology to
the type strain of A. crystallopoietes (99.7%), and strain SN17, to the type strain of A. arilaitensis (99.8%). The isolated strains are capable of growing on naphthalene and phenanthrene (as the sole sources of carbon and energy)
in the presence of 60 mg/l NaCl. Their cells contain large plasmids ranging in size from 85 to 130 kb. Plasmid elimination
from Arthrobacter sp. SF27 has proved to result in the loss of capacity for growing on naphthalene and phenanthrene, suggesting a plasmid localization
of genes responsible for degradation of these compounds. |
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