ArticleApplied and environmental microbiology2010
Evolutionary dynamics of insertion sequences in relation to the evolutionary histories of the chromosome and symbiotic plasmid genes of Rhizobium etli populations.
Article in Applied and environmental microbiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 30 citations in OpenAlex.
- Impacts of Natural Selection on Evolution of Core and Symbiotically Specialized (International journal of molecular sciences · 2023Article
- Comparative Genomics across Three Ensifer Species Using a New Complete Genome Sequence of the Medicago SymbiontMicroorganisms · 2021Article
- Easy identification of insertion sequence mobilization events in related bacterial strains with ISCompare.G3 (Bethesda, Md.) · 2021Article
- Genetic characterization at the species and symbiovar level of indigenous rhizobial isolates nodulating Phaseolus vulgaris in Greece.Scientific reports · 2021Article
- A Functional Bacterium-to-Plant DNA Transfer Machinery of Rhizobium etli.PLoS pathogens · 2016Article
- Symbiosis island shuffling with abundant insertion sequences in the genomes of extra-slow-growing strains of soybean bradyrhizobia.Applied and environmental microbiology · 2015Article
- Complete Genome Sequence of the RmInt1 Group II Intronless Sinorhizobium meliloti Strain RMO17.Genome announcements · 2014Article
- Elucidation of insertion elements carried on plasmids and in vitro construction of shuttle vectors from the toxic cyanobacterium Planktothrix.Applied and environmental microbiology · 2014Article
- Genomic basis of symbiovar mimosae in Rhizobium etli.BMC genomics · 2014Article
- Replicon-dependent differentiation of symbiosis-related genes in Sinorhizobium strains nodulating Glycine max.Applied and environmental microbiology · 2014Article
- Characterization of Rhizobium grahamii extrachromosomal replicons and their transfer among rhizobia.BMC microbiology · 2014Article
- Narrow-host-range bacteriophages that infect Rhizobium etli associate with distinct genomic types.Applied and environmental microbiology · 2014Article
- Analysis of synonymous codon usage patterns in the genus Rhizobium.World journal of microbiology & biotechnology · 2013Article
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- Genomic lineages of Rhizobium etli revealed by the extent of nucleotide polymorphisms and low recombination.BMC evolutionary biology · 2011Article
- Genome sequence of Rhizobium etli CNPAF512, a nitrogen-fixing symbiont isolated from bean root nodules in Brazil.Journal of bacteriology · 2011Article
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Authors and funding
8 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Insertion sequences (IS) are mobile genetic elements that are distributed in many prokaryotes. In particular, in the genomes of the symbiotic nitrogen-fixing bacteria collectively known as rhizobia, IS are fairly abundant in plasmids or chromosomal islands that carry the genes needed for symbiosis. Here, we report an analysis of the distribution and genetic conservation of the IS found in the genome of Rhizobium etli CFN42 in a collection of 87 Rhizobium strains belonging to populations with different geographical origins. We used PCR to generate presence/absence profiles of the 39 IS found in R. etli CFN42 and evaluated whether the IS were located in consistent genomic contexts. We found that the IS from the symbiotic plasmid were frequently present in the analyzed strains, whereas the chromosomal IS were observed less frequently. We then examined the evolutionary dynamics of these strains based on a population genetic analysis of two chromosomal housekeeping genes (glyA and dnaB) and three symbiotic sequences (nodC and the two IS elements). Our results indicate that the IS contained within the symbiotic plasmid have a higher degree of genomic context conservation, lower nucleotide diversity and genetic differentiation, and fewer recombination events than the chromosomal housekeeping genes. These results suggest that the R. etli populations diverged recently in Mexico, that the symbiotic plasmid also had a recent origin, and that the IS elements have undergone a process of cyclic infection and expansion.
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