Antonie van Leeuwenhoek

, Volume 68, Issue 3, pp 225–229 | Cite as

Chromosome-encoded inducible copper resistance inPseudomonas strains

  • Eréndira Vargas
  • Sergio Gutiérrez
  • Ma. Elena Ambriz
  • Carlos Cervantes
Research Papers


NinePseudomonas strains were selected by their high copper tolerance from a population of bacteria isolated from heavy-metal polluted zones. Copper resistance (Cu r ) was inducible by previous exposure of cultures to subinhibitory amounts of copper sulfate. All nine strains possessed large plasmids, but transformation and curing results suggest that Cu r is conferred by chromosomal genes. Plasmid-lessPseudomonas aeruginosa PAO-derived strains showed the same level of Cu r as environmental isolates and their resistance to copper was also inducible. Total DNA from the environmentalPseudomonas, as well as fromP. aeruginosa PAO strains, showed homology to a Cu r P. syringae cop probe at low-stringency conditions but failed to hybridize at high-stringency conditions.

Key words

copper resistance Pseudomonas 


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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Eréndira Vargas
    • 1
  • Sergio Gutiérrez
    • 1
  • Ma. Elena Ambriz
    • 1
  • Carlos Cervantes
    • 1
  1. 1.Instituto de Investigaciones Químico-BiológicasUniversidad MichoacanaMorelia, Mich.México

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