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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 76, Issue 1

sp. nov. and sp. nov., new aerobic anoxygenic phototrophs isolated from a Manitoban marsh Open Access

Abstract

A peach-pigmented strain FW153 and a yellow-pigmented FW199 were isolated from marsh water located at Fort Whyte, Manitoba, Canada. Both produce an anoxygenic photosynthetic apparatus, with a reaction centre encircled by a light-harvesting I complex containing bacteriochlorophyll . They do not produce RuBisCo and do not grow anaerobically or autotrophically, supporting the classification of both as aerobic anoxygenic phototrophs. Sequencing of the 16S rRNA gene showed similarity to (99.93%), (98.73%) and (98.52%) for FW153, while for FW199, it was (97.47%), (97.44%) and (97.08%). Polyphasic analysis identified differences in physiology and cellular fatty acid composition, as well as within the genome, with average nucleotide identity (<95%) and digital DNA–DNA hybridization values (<70%) between each strain and their closest relatives supporting species designation. Therefore, we propose that FW153 (=NCIMB 15610=DSM 120042) and FW199 (=NCIMB 15611=DSM 120043) be classified as the type strains of new species with the names sp. nov. and sp. nov., respectively.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): aerobic anoxygenic phototrophs , bacteriochlorophyll a , marsh , Rhizorhabdus , Sphingomonadaceae and Sphingomonas
Funding
This study was supported by the:
  • Wilson Enhancement Fund for Applied Research in Science at Bellevue University
    • Principal Award Recipient: JohnA Kyndt
  • Natural Sciences and Engineering Research Council of Canada (Award 1501)
    • Principal Award Recipient: VladimirYurkov
© 2026 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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2026-01-09
2026-01-13

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Rhizorhabdus antheiae sp. nov. and Sphingomonas eleionomae sp. nov., new aerobic anoxygenic phototrophs isolated from a Manitoban marsh
Int J Syst Evol Microbiol 76, 007018 (2026); https://doi.org/10.1099/ijsem.0.007018
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