Estimated timeline for the evolution of symbiotic nitrogen fixing Paraburkholderia
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View abstract on PubMed
Summary
This summary is machine-generated.The evolutionary history of beta-rhizobia, specifically the Paraburkholderia genus, reveals their origins over 2.7 billion years ago. Their diversification is linked to major geological and environmental shifts, influencing their current distribution.
Area Of Science
- Microbiology
- Evolutionary Biology
- Genomics
Background
- Beta-rhizobia, nitrogen-fixing symbionts of legumes, are primarily found in the genera Paraburkholderia, Trinickia, and Cupriavidus.
- The evolutionary history of nodulation in the predominant beta-rhizobial genus, Paraburkholderia, is not well-characterized.
Purpose Of The Study
- To investigate the evolutionary history of nodulation in Paraburkholderia.
- To estimate divergence dates and ancestral nodulation states within beta-rhizobia.
- To understand environmental factors shaping beta-rhizobia distribution.
Main Methods
- Phylogenetic analysis of over 800 proteobacterial genomes.
- Molecular dating using BEAST and APE software.
- Estimation of divergence dates and ancestral states.
Main Results
- The most recent common ancestor of extant beta-rhizobial species emerged 2744–1752 million years ago.
- Major diversification phases of rhizobial Paraburkholderia occurred during the Permian-Triassic, Jurassic, and Cretaceous-Paleogene periods.
- Nodulation loci were acquired from different sources between 103 and 48 million years ago.
Conclusions
- The study elucidates the deep evolutionary history of rhizobial Paraburkholderia.
- Understanding past environmental factors explains current geographical distribution.
- Identifies potential locations for discovering novel beta-rhizobia.
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