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Legume Symbiotic Nitrogen Fixation byβ-Proteobacteria Is Widespread inNature
- Wen‐Ming Chen, L. Moulin, C. Bontemps, P. Vandamme, G. Béna, C. Boivin-Masson
- BiologyJournal of bacteriology
- 15 December 2003
Findings suggest that beta-rhizobia evolved from diazotrophs through multiple lateral nod gene transfers, strongly supporting the hypothesis of the unique origin of common nod genes.
Legumes Symbioses: Absence of Nod Genes in Photosynthetic Bradyrhizobia
It is shown by complete genome sequencing of two symbiotic, photosynthetic, Bradyrhizobium strains, BTAi1 and ORS278, that canonical nodABC genes and typical lipochito-oligosaccharidic Nod factors are not required for symbiosis in some legumes.
Phylogenetic analyses of symbiotic nodulation genes support vertical and lateral gene co-transfer within the Bradyrhizobium genus.
Genetic diversity of Mimosa pudica rhizobial symbionts in soils of French Guiana: investigating the origin and diversity of Burkholderia phymatum and other beta-rhizobia.
- R. Mishra, P. Tisseyre, L. Moulin
- Biology, Environmental ScienceFEMS microbiology ecology
- 1 February 2012
Phylogenies of nodA, nodC and nifH genes showed a monophyly of symbiotic genes for beta-rhizobia isolated from Mimosa spp.
Ribosomal External and Internal Transcribed Spacers: Combined Use in the Phylogenetic Analysis of Medicago (Leguminosae)
The phylogeny obtained in Medicago suggests that none of the three subsections included in the study is monophyletic, and ETS appears to be a valuable source of information for solidifying ITS plant phylogeny.
Molecular phylogeny supports the morphologically based taxonomic transfer of the “medicagoid”Trigonella species to the genus Medicago L.
- G. Béna
- BiologyPlant Systematics and Evolution
- 1 November 2001
Using criteria of monophyly and support, it was concluded that the medicagoids are better joined in Medicago rather than placed in a new genus.
Methylobacterium nodulans sp. nov., for a group of aerobic, facultatively methylotrophic, legume root-nodule-forming and nitrogen-fixing bacteria.
The present study includes additional genotypic and phenotypic characterization of this novel Methylobacterium species, i.e. nifH gene sequence, morphology, physiology, enzymic and carbon source assimilation tests and antibiotic resistance.
Mesorhizobium metallidurans sp. nov., a metal-resistant symbiont of Anthyllis vulneraria growing on metallicolous soil in Languedoc, France.
Comparative analysis of nearly full-length 16S rRNA gene sequences showed that these Gram-negative bacteria belonged to the genus Mesorhizobium and that they were related most closely to Mes orhizOBium tianshanense ORS 2640(T).
Emended description of the genus Phyllobacterium and description of four novel species associated with plant roots: Phyllobacterium bourgognense sp. nov., Phyllobacterium ifriqiyense sp. nov.,…
Four novel species of gram-negative bacteria were isolated from the rhizoplane of Brassica napus in France and from root nodules of Argyrolobium uniflorum, Astragalus algerianus and Lathyrus numidicus growing in the infra-arid zone of southern Tunisia and four novel species are proposed.
Diversity analyses of Aeschynomene symbionts in Tropical Africa and Central America reveal that nod-independent stem nodulation is not restricted to photosynthetic bradyrhizobia.
A newly identified cluster of strains that lacked canonical nod genes and efficiently stem-nodulated A.’indica, but were not photosynthetic were identified, and the phenotypic properties of this new cluster of bacteria were reflected by their phylogenetical position, as being intermediate in distance between classical root- nodulatingBradyrhizobium spp.