Paraburkholderia youngii sp. nov. and 'Paraburkholderia atlantica' - Brazilian and Mexican Mimosa-associated rhizobia that were previously known as Paraburkholderia tuberum sv. mimosae

Lazarus Mavima, Chrizelle W. Beukes, Marike Palmer, Sofie E. De Meyer, Euan K. James, Marta Maluk, Eduardo Gross, Fabio Bueno Dos Reis Junior, Juanita R. Avontuur, Wai Y. Chan, Stephanus N. Venter, Emma T. Steenkamp

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4 Citations (Scopus)


Previous studies have recognized South and Central/Latin American mimosoid legumes in the genera Mimosa, Piptadenia and Calliandra as hosts for various nodulating Paraburkholderia species. Several of these species have been validly named in the last two decades, e.g., P. nodosa, P. phymatum, P. diazotrophica, P. piptadeniae, P. ribeironis, P. sabiae and P. mimosarum. There are still, however, a number of diverse Paraburkholderia strains associated with these legumes that have an unclear taxonomic status. In this study, we focus on 30 of these strains which originate from the root nodules of Brazilian and Mexican Mimosa species. They were initially identified as P. tuberum and subsequently placed into a symbiovar (sv. mimosae) based on their host preferences. A polyphasic approach for the delineation of these strains was used, consisting of genealogical concordance analysis (using atpD, gyrB, acnA, pab and 16S rRNA gene sequences), together with comparisons of Average Nucleotide Identity (ANI), DNA G+C content ratios and phenotypic characteristics with those of the type strains of validly named Paraburkholderia species. Accordingly, these 30 strains were delineated into two distinct groups, of which one is conspecific with 'P. atlantica' CNPSo 3155T and the other new to Science. We propose the name Paraburkholderia youngii sp. nov. with type strain JPY169T (= LMG 31411T; SARCC751T) for this novel species.

Original languageEnglish
Article number126152
Number of pages12
JournalSystematic and Applied Microbiology
Issue number1
Early online date28 Oct 2020
Publication statusPublished - Jan 2021


  • Bacterial Typing Techniques
  • Base Composition
  • Brazil
  • Burkholderiaceae/classification
  • DNA, Bacterial/genetics
  • Genes, Bacterial
  • Mexico
  • Mimosa/microbiology
  • Phylogeny
  • RNA, Ribosomal, 16S/genetics
  • Root Nodules, Plant/microbiology
  • Sequence Analysis, DNA
  • Symbiosis
  • South America
  • Central America
  • Average nucleotide identity
  • Rhizobia
  • Genealogical concordance
  • Burkholderia legume


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