Friend or Foe: Draft Genome Sequence of
            <i>Bradyrhizobium</i>
            sp. Strain SRS-191

Chauhan, Ashvini; Rathore, Rajesh; Agarwal, Meenakshi; Chauhan, Adi J.; Taywade, Aryan

doi:10.1128/mra.00753-22

Cited by 1 publication

(1 citation statement)

References 16 publications

(24 reference statements)

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“…IV 81033. The large variation in genome size of AIRs, which is consistent with previous studies [44][45][46][47][48][49][50][51][52], suggests a long evolutionary history, leading to divergence in genome size. Variations in mean genome size were observed among different classes of Bradyrhizobium.…”

Section: Genome Profilesupporting

confidence: 90%

Nodulating Aeschynomene indica without Nod Factor Synthesis Genes: In Silico Analysis of Evolutionary Relationship

Zhao,

Dong,

Zhang

et al. 2024

Agronomy

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Aeschynomene indica rhizobia (AIRs) are special classes of bacteria capable of nodulating without nodulation factors and have photosynthetic capacity. With an aim to characterize the structural variations in Bradyrhizobium genomes during its evolution, the genomes of AIRs and the reference Bradyrhizobium strains were compared utilizing molecular biology, bioinformatics, and biochemistry techniques. The presence of symbiotic nitrogen fixation (nif) genes and photosynthetic genes, as well as components of the T3SS (Type III secretion system) and T3CP (Type III chaperone) in the genome of AIRs, was also assessed. Additionally, the origin, evolutionary history, and genes associated with the NF-independent nodulation pattern in AIRs were explored. The results indicate that horizontal gene transfer events have occurred in AIRs, and three distinct origins of AIRs were estimated: early differentiated AIRs, non-symbiotic Bradyrhizobium, and non-AIRs. In contrast to the significant genetic transformations observed in the second and third groups, the first group of AIRs displays a rich evolutionary history, exhibits high species diversity, and primarily relies on vertical transmission of nitrogen fixation and photosynthetic genes. Overall, the findings provide a fundamental theoretical foundation for gaining a deeper understanding of the phylogeny and genealogy of AIRs.

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