1887

Abstract

The relationships between and the rhizobia that nodulate and (goat's rue) and recognized species of and were investigated by using deoxyribonucleic acid (DNA)-DNA hybridization, legume nodulation tests, and phage typing. The strains formed a distinct DNA homology group which could be divided into two subgroups. The mean levels of relative homology at 65°C of 11 strains of with reference strains USDA 208 and USDA 191 were 86 and 80%, respectively. These values were significantly higher (Student's test, < 0.001) than the mean levels of relative homology with DNAs from other groups of rhizobia. The -nodulating rhizobia also formed a distinct DNA homology group. The mean levels of relative homology at 65°C of DNAs from 11 strains with DNAs from reference strains gall and galNW3, which effectively nodulate , were 79 and 85%, respectively. These values were also significantly higher (Student's test, < 0.001) than the values obtained with DNAs from other groups of rhizobia. These results correlated with cross-inoculation and phage-typing results and indicated that the two groups are genetically distinct. Genomic DNA was used as a probe in a modified colony hybridization autoradiographic procedure for the identification of DNAs from , and sp. () in colonies and from nodules.

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/content/journal/ijsem/10.1099/00207713-36-4-550
1986-10-01
2019-10-18
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http://instance.metastore.ingenta.com/content/journal/ijsem/10.1099/00207713-36-4-550
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