Archives of Microbiology

, Volume 153, Issue 3, pp 235–240 | Cite as

Identification of Frankia strains in nodules by hybridization of polymerase chain reaction products with strain-specific oligonucleotide probes

  • P. Simonet
  • P. Normand
  • A. Moiroud
  • R. Bardin
Original Papers


A set of oligonucleotides has been developed to study the competitivity of two Frankia strains in the nodulation of the roots of two host plant species: Alnus glutinosa and Alnus incana. Two 20 mer-oligonucleotides, complementary to highly conserved sequences inside the nifH gene, were used as primers for the polymerase chain reaction (PCR) system in order to amplify microsymbiont DNA extracted from actinorhizae. PCR products were analyzed using two strain-specific 15-mer oligonucleotides identified in the amplified region. Hybridization data indicate that strain ACoN24d is more competitive than train ArI3 in the nodulation of both hosts.

Key words

Amplification Competitivity Frankia Hybridization NifNodulation 


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • P. Simonet
    • 1
  • P. Normand
    • 2
  • A. Moiroud
    • 1
  • R. Bardin
    • 1
  1. 1.Laboratoire de Biologie des Sols, U. A. CNRS 697Université Lyon 1VilleurbanneFrance
  2. 2.Centre de Recherches en Biologie ForestièreUniversité LavalCanada

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