Folia Microbiologica

, Volume 20, Issue 4, pp 332–339 | Cite as

Cross-resistance ofEscherichia coli B/r tocis-platinum (II) diamminochloride, UV light and alkylating agents

  • S. Mátlová


Gradual transfers of the strainEscherichia coli B/r on M9 agar with increasing concentrations ofcis-platinum (II) diamminochloride (cis-Pt(II)) yielded a resistant strain SM 405 capable of growing on liquid M9 medium containing 250 μmcis-Pt(II). The parent strainEscherichia coli B/r is completely inhibited in both division and growth atcis-Pt(II) concentrations as low as 30 μM. The resistant mutant has a longer doubling time than the parent strain. No other differences were found between the two strains. To elucidate the nature of the resistance, the effect ofcis-Pt(II) on the survival of the two strains was compared with that of nitrogen mustard, UV light and ethyl methanesulphonate (EMS). The resistant strain SM 405 was found to be more hardened against the lethal action of UV light and nitrogen mustard but less so against EMS. It had also a higher ability of a host-cell reactivation of UV-irradiated phage T3. The different resistance of the B/r and SM 405 strains is probably due to a mutation increasing the effectiveness of the excision repair in the latter.


Parent Strain Nutrient Agar Excision Repair Nitrogen Mustard Recombination Repair 
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Copyright information

© Institute of Microbiology, Academy of Sciences of the Czech Republic 1975

Authors and Affiliations

  • S. Mátlová
    • 1
  1. 1.Department of Genetics, Microbiology and Biophysics, Faculty of SciencesCharles UniversityPrague 2

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