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Abstract

Bradyrhizobial strains nodulate the native legume () in its natural habitat: the high-mountain ecosystem of Tenerife (Canary Islands), where nitrogen fixation is an essential activity in its N-poor soils. Three of these strains, SSUT18, SSUT77 and SSUT112, are representative of a major phylotype within the genus and the phylogenetic analysis of their 16S rRNA gene sequences showed that is their closest relative. Nevertheless, the multilocus sequence analysis and the genome analysis distinguished these strains from the type strain of and from the remaining species of the genus . The calculated Average Nucleotide Identity (blast) (ANIb) and digital DNA–DNA hybridization values between the genomes of the strains from the new species and were also lower than the threshold values proposed for species differentiation. These data, together with differences observed in chemotaxonomic and phenotypic characteristics, support the classification of the strains SSUT18, SSUT77 and SSUT112 into a new species of , for which we propose the name sp. nov. (type strain SSUT18=CECT 30998=LMG 33353).

Funding
This study was supported by the:
  • Fundación CajaCanarias (Award 2017REC13)
    • Principal Award Recipient: MilagrosLeón-Barrios
  • Consejería de Economía, Conocimiento y Empleo, Gobierno de Canarias (Award ProID2020010103)
    • Principal Award Recipient: MilagrosLeón-Barrios
  • Junta de Castilla y León and European Union (ERDF Europe drives our growth (Award CLU-2O18-04 and CLU-2019-05)
    • Principal Award Recipient: EncarnaVelázquez
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/content/journal/ijsem/10.1099/ijsem.0.007059
2026-02-03
2026-02-15

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