Gelidimonas denitrificans gen. nov., sp. nov., and Gelidimonas diazotrophica sp. nov. psychrophilic bacteria involved in the nitrogen cycle in tundra soils of South Spitsbergen.
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| Main Authors: | , , , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
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Systematic and applied microbiology
2026
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| author | Grzesiak, Jakub Brzykcy, Julia Young, Peter Krakowska, Elvira Stasiuk, Robert Krakowski, Kamil Decewicz, Przemysław Kiedryńska, Alina Matlakowska, Renata Bartosik, Dariusz |
| author_facet | Grzesiak, Jakub Brzykcy, Julia Young, Peter Krakowska, Elvira Stasiuk, Robert Krakowski, Kamil Decewicz, Przemysław Kiedryńska, Alina Matlakowska, Renata Bartosik, Dariusz Grzesiak, Jakub Brzykcy, Julia Young, Peter Krakowska, Elvira Stasiuk, Robert Krakowski, Kamil Decewicz, Przemysław Kiedryńska, Alina Matlakowska, Renata Bartosik, Dariusz |
| collection | PubMed - marine biology |
| contents | Gelidimonas denitrificans gen. nov., sp. nov., and Gelidimonas diazotrophica sp. nov. psychrophilic bacteria involved in the nitrogen cycle in tundra soils of South Spitsbergen. Grzesiak, Jakub Brzykcy, Julia Young, Peter Krakowska, Elvira Stasiuk, Robert Krakowski, Kamil Decewicz, Przemysław Kiedryńska, Alina Matlakowska, Renata Bartosik, Dariusz Two Gram-negative, psychrophilic, denitrifying bacterial strains, D2 and D11, were isolated from ornithogenic soil collected at a breeding colony of the marine bird Alle alle on Spitsbergen Island, Svalbard (Norway; High Arctic). Complete genome sequencing revealed that each strain possesses a single circular chromosome (3.83 Mbp and 3.63 Mbp, respectively) with similar GC content (55.3% and 55.5%), as well as plasmids - one shared by both strains (26.3 kb) and one unique to strain D11 (16.3 kb). Despite their striking genetic similarity, the two strains exhibit distinct physiological characteristics. Strain D2 is a facultative chemolithoautotroph capable of using hydrogen as an energy source and assimilating carbon dioxide and dinitrogen, whereas strain D11 displays a strictly heterotrophic lifestyle. Although the 16S rRNA genes of D2 and D11 share a high level of sequence identity (99.6%), whole-genome comparative analyses, including digital DNA-DNA hybridization (dDDH) and average nucleotide identity (ANI), indicated that they represent two distinct species within the family Oxalobacteraceae (class Betaproteobacteria). Core proteome-based phylogenetic analysis of Oxalobacteraceae unambiguously placed both strains within the family; however, neither clustered with any currently described genus. We therefore propose that these strains represent a novel genus, Gelidimonas gen. nov., with type species Gelidimonas denitrificans sp. nov. (type strain D11) and a second species Gelidimonas diazotrophica sp. nov. (type strain D2). |
| format | Artículo científico |
| id | pubmed_42150376 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Systematic and applied microbiology |
| record_format | pubmed |
| spellingShingle | Gelidimonas denitrificans gen. nov., sp. nov., and Gelidimonas diazotrophica sp. nov. psychrophilic bacteria involved in the nitrogen cycle in tundra soils of South Spitsbergen. Grzesiak, Jakub Brzykcy, Julia Young, Peter Krakowska, Elvira Stasiuk, Robert Krakowski, Kamil Decewicz, Przemysław Kiedryńska, Alina Matlakowska, Renata Bartosik, Dariusz Gelidimonas denitrificans gen. nov., sp. nov., and Gelidimonas diazotrophica sp. nov. psychrophilic bacteria involved in the nitrogen cycle in tundra soils of South Spitsbergen. Grzesiak, Jakub Brzykcy, Julia Young, Peter Krakowska, Elvira Stasiuk, Robert Krakowski, Kamil Decewicz, Przemysław Kiedryńska, Alina Matlakowska, Renata Bartosik, Dariusz Two Gram-negative, psychrophilic, denitrifying bacterial strains, D2 and D11, were isolated from ornithogenic soil collected at a breeding colony of the marine bird Alle alle on Spitsbergen Island, Svalbard (Norway; High Arctic). Complete genome sequencing revealed that each strain possesses a single circular chromosome (3.83 Mbp and 3.63 Mbp, respectively) with similar GC content (55.3% and 55.5%), as well as plasmids - one shared by both strains (26.3 kb) and one unique to strain D11 (16.3 kb). Despite their striking genetic similarity, the two strains exhibit distinct physiological characteristics. Strain D2 is a facultative chemolithoautotroph capable of using hydrogen as an energy source and assimilating carbon dioxide and dinitrogen, whereas strain D11 displays a strictly heterotrophic lifestyle. Although the 16S rRNA genes of D2 and D11 share a high level of sequence identity (99.6%), whole-genome comparative analyses, including digital DNA-DNA hybridization (dDDH) and average nucleotide identity (ANI), indicated that they represent two distinct species within the family Oxalobacteraceae (class Betaproteobacteria). Core proteome-based phylogenetic analysis of Oxalobacteraceae unambiguously placed both strains within the family; however, neither clustered with any currently described genus. We therefore propose that these strains represent a novel genus, Gelidimonas gen. nov., with type species Gelidimonas denitrificans sp. nov. (type strain D11) and a second species Gelidimonas diazotrophica sp. nov. (type strain D2). |
| title | Gelidimonas denitrificans gen. nov., sp. nov., and Gelidimonas diazotrophica sp. nov. psychrophilic bacteria involved in the nitrogen cycle in tundra soils of South Spitsbergen. |
| url | https://pubmed.ncbi.nlm.nih.gov/42150376/ |