Abstract
DNA homologies at 65°C in 0.14 phosphate buffer, pH 6.8, were determined between 24 strains ofRhizobium capable of nodulatingLeucaena leucocephala and fourRhizobium reference strains. Twenty-one strains (88%) were placed in one of four DNA homology groups. The mean relative homology within a group was 65%, while the mean relative homology between groups was 20%. Thermal melting points for reassociated DNA (ΔTm(e) values) were also measured. The lack of DNA homology between groups indicates that several very different populations of bacteria are capable of nodulating and fixing nitrogen with leucaena.
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Jarvis, B.D.W. Genetic diversity ofRhizobium strains which nodulateLeucaena leucocephala . Current Microbiology 8, 153–158 (1983). https://doi.org/10.1007/BF01568849
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DOI: https://doi.org/10.1007/BF01568849