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Volume 59, Issue 12

sp. nov., a symbiotic bacterium isolated from (Širj.) Vassilcz. Free

Abstract

Isolated from root nodules of (Širj.) Vassilcz. grown in Tibet, China, cells of the bacterial strains CCBAU 85039 and CCBAU 85027 were Gram-negative, aerobic, motile, non-spore-forming rods that formed colonies that were semi-translucent and opalescent on yeast extract-mannitol agar. In numerical taxonomy, SDS-PAGE analysis of whole-cell proteins and DNA–DNA hybridization, the two strains were very similar and were different from reference strains of defined species. In the phylogeny based on 16S rRNA gene sequences, they were most similar to CFN 42 (98.2 % similarity) and USDA 2370 (97.6 %). Sequence analyses of the housekeeping genes , and and the 16S–23S rRNA intergenic spacer, phenotypic characteristics and cellular fatty acid profiles strongly suggested that these two strains represented a novel species within . Cross-nodulation tests and sequencing of and genes showed that these two strains were symbiotic bacteria that nodulated , , , , and . Based on the results, the novel species sp. nov. is described to accommodate the two strains. The type strain is CCBAU 85039 (=LMG 24453 =CGMCC 1.7071). The DNA G+C content of this strain is 59.7 mol% ( ).

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2009-12-01
2024-04-19
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Rhizobium tibeticum sp. nov., a symbiotic bacterium isolated from Trigonella archiducis-nicolai (Širj.) Vassilcz.
Int J Syst Evol Microbiol 59, 3051 (2009); https://doi.org/10.1099/ijs.0.009647-0
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[PDF file of Supplementary Figs S1 and S2](82 KB)

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Electrophoretic protein patterns showing the relationships among strains CCBAU 85039 and CCBAU 85027 and reference strains of phylogenetically related species. Only strain CCBAU 85039 was used to construct the dendrogram, because strain CCBAU 85027 had an almost identical protein profile.

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[PDF file of Supplementary Tables S1 and S2](73 KB)

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