Advertisement

Current Microbiology

, Volume 47, Issue 2, pp 0129–0133 | Cite as

Direct Detection and Quantification of Horizontal Gene Transfer by Using Flow Cytometry and gfp as a Reporter Gene

  • Søren J. Sørensen
  • Anders H. Sørensen
  • Lars H. Hansen
  • Gunnar Oregaard
  • Duncan Veal

Abstract

A new cultivation-independent method for studying conjugal gene transfer between bacteria was evaluated. The method was based on direct detection and enumeration of donor and transconjugant bacterial cells by flow cytometry. Specific detection of transconjugants was obtained by using a conjugative plasmid tagged with a reporter gene (gfp) encoding green fluorescent protein. A chromosomal encoded repressor (lacI q1 ) repressed expression of GFP in the donor bacteria. Enumeration of the donor cells was performed after induction of GFP expression by the addition of inducer isopropyl-thio-β-D-galactoside (IPTG). The method presented here provided simple and precise quantification of horizontal gene transfer between both Escherichia coli and Pseudomonas putida strains. RID=”” ID=”” <E5>Correspondence to: </E5>S. J. S&oslash;rensen; <E5>email:</E5> SJS&commat;MERMAID.MOLBIO.KU.DK

Keywords

Escherichia Coli Flow Cytometry Green Fluorescent Protein Pseudomonas Gene Transfer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag New York Inc. 2003

Authors and Affiliations

  • Søren J. Sørensen
    • 1
  • Anders H. Sørensen
    • 1
  • Lars H. Hansen
    • 1
  • Gunnar Oregaard
    • 1
  • Duncan Veal
    • 2
  1. 1.Department of General Microbiology, Institute of Molecular Biology, University of Copenhagen, Sølvgade 83 H, DK 1307, Copenhagen, DenmarkDK
  2. 2.Centre for Fluorimetric Applications in Biotechnology, Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, AustraliaAU

Personalised recommendations