Abstract
One hundredFrankia strains isolated from variousAlnus species in a single alder stand were tested for plasmid presence. Plasmid DNA was observed in five of the frankiae strains and was analyzed. We found that plasmids with a similar molecular weight exhibited in fact minor divergences in restriction patterns. The genetic diversity among the five isolates which contained plasmids and seven isolates which contained no plasmid DNA were examined by using restriction endonucleas digestions, Southern hybridization ofnifHDK,nifAB genes, andFrankia cryptic DNA fragments determined ‘at random’. Results indicate that genomic DNA digestion patterns and Southern hybridizations to anifHDK probe were not able to discriminate between closely related frankiae. On the other hand, plasmid presence, Southern hybridization to anifAB proble or to a crypticFrankia probe allowed us to delineate groupings of these isolates.
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Simonet, P., Thi Le, N., Moiroud, A. et al. Diversity ofFrankia strains isolated from a single alder stand. Plant Soil 118, 13–22 (1989). https://doi.org/10.1007/BF02232786
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DOI: https://doi.org/10.1007/BF02232786