- International Journal of Systematic and Evolutionary Microbiology
- Volume 44, Issue 4
f Polyphasic Taxonomy of Rhizobia: Emendation of the Genus Sinorhizobium and Description of Sinorhizobium meliloti comb. nov., Sinorhizobium saheli sp. nov., and Sinorhizobium teranga sp. nov.
- Authors: PHILIPPE DE LAJUDIE, ANNE WILLEMS, BRUNO POT, DIRK DEWETTINCK, GLORIA MAESTROJUAN, MARC NEYRA, MATTHEW DAVID COLLINS, BERNARD DREYFUS, KAREL KERSTERS, MONIQUE GILLIS*
- * Corresponding author. Mailing address: Laboratorium voor Microbiologie, Universiteit Gent, K.-L. Ledeganckstraat, 35, B-9000 Ghent, Belgium. Phone: 32 9 264 5117. Fax: 32 9 264 5346. Electronic mail address: Moniek.Gillis@rug.ac.be.
- First Published Online: 01 October 1994, International Journal of Systematic and Evolutionary Microbiology 44: 715-733, doi: 10.1099/00207713-44-4-715
- Subject: Original Papers Relating To Systematic Bacteriology
- Issue Published:
A total of 80 bacterial strains isolated from different Sesbania and Acacia species growing in various sites in Senegal (West Africa) were compared with 35 reference strains of Rhizobium, Bradyrhizobium, Azorhizobium, and Agrobacterium species and with 33 representative strains of the different groups of Brazilian isolates described on the basis of the results of a numerical analysis of the whole-cell protein patterns obtained by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Fifty-two strains could be placed in three protein electrophoretic clusters, two of which were different from the clusters containing various reference or representative strains, while 30 other strains could not be placed in any group. The strains belonging to the three clusters were studied by determining their nodulation host ranges and their morphological, physiological, and auxanographic characteristics. Representative strains of the three clusters were also genotypically characterized by determining their DNA base compositions, by performing DNA-DNA and DNA-rRNA hybridization experiments, and by determining their 16S rRNA gene sequences. Our results showed that two of the clusters identified on the basis of SDS-PAGE data are genotypically and phenotypically distinct groups that belong on the Rhizobium meliloti-Rhizobium fredii rRNA branch. The third cluster is localized on the Rhizobium loti rRNA branch in the vicinity of Rhizobium huakuii and contains strains isolated in Africa, in Brazil, and in New Zealand from different leguminous species. On the basis of the results of the present study, we propose to emend the genus Sinorhizobium and to reclassify R. meliloti as Sinorhizobium meliloti comb. nov. In addition, two new species, Sinorhizobium saheli and Sinorhizobium teranga, are proposed for isolates from Senegal.
Copyright © 1994 International Union of Microbiological Societies | Published by the Microbiology Society
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