Cultivation and genomic characterization of novel methanogens from arid desert biocrust.
Fuente:
PubMed
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
ISME communications
2026
|
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1868266084880089089 |
|---|---|
| author | Tian, Weitao Petrová, Eva Sakai, Sanae Nweze, Julius Eyiuche Daebeler, Anne Angel, Roey |
| author_facet | Tian, Weitao Petrová, Eva Sakai, Sanae Nweze, Julius Eyiuche Daebeler, Anne Angel, Roey Tian, Weitao Petrová, Eva Sakai, Sanae Nweze, Julius Eyiuche Daebeler, Anne Angel, Roey |
| collection | PubMed - marine biology |
| contents | Cultivation and genomic characterization of novel methanogens from arid desert biocrust. Tian, Weitao Petrová, Eva Sakai, Sanae Nweze, Julius Eyiuche Daebeler, Anne Angel, Roey Methanogens are strictly anaerobic archaea capable of energy conservation by methane production, yet their presence in oxic and arid environments challenges existing paradigms. In this study, we enriched and genomically characterized seven methanogenic cultures from desert biocrusts, affiliated with the genera , , and . Six of these new enrichment cultures represent new species. Nonetheless, phylogenomic analyses revealed close genetic relationships with organisms from anoxic environments, indicating the absence of an evolutionary distinction. Comparative genomics exposed diverse though non-unique repertories of antioxidant (e.g. catalase, superoxide dismutase and desulfoferrodoxin), and desiccation-resistance genes (including genes for maintaining osmotic pressure and repair of cell wall and membrane), with spp possessing the lowest gene abundance and diversity for oxygen and desiccation tolerance. Nevertheless, the occurrence of a Class I methanogen such as in arid soils challenges the notion that members of this class are less oxygen tolerant than Class II. Pangenome analysis further uncovered unique genes enriched in membrane-associated functions and potentially non-functional stress-related genes. Via a global metagenomic survey we find that methanogens are underdetected in dryland soils, likely due to sequencing depth limitations. Our findings highlight previously overlooked methanogen diversity and ecological plasticity in oxic and desiccated habitats, and emphasize the need for further studies to elucidate their survival strategies. |
| format | Artículo científico |
| id | pubmed_41696028 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | ISME communications |
| record_format | pubmed |
| spellingShingle | Cultivation and genomic characterization of novel methanogens from arid desert biocrust. Tian, Weitao Petrová, Eva Sakai, Sanae Nweze, Julius Eyiuche Daebeler, Anne Angel, Roey Cultivation and genomic characterization of novel methanogens from arid desert biocrust. Tian, Weitao Petrová, Eva Sakai, Sanae Nweze, Julius Eyiuche Daebeler, Anne Angel, Roey Methanogens are strictly anaerobic archaea capable of energy conservation by methane production, yet their presence in oxic and arid environments challenges existing paradigms. In this study, we enriched and genomically characterized seven methanogenic cultures from desert biocrusts, affiliated with the genera , , and . Six of these new enrichment cultures represent new species. Nonetheless, phylogenomic analyses revealed close genetic relationships with organisms from anoxic environments, indicating the absence of an evolutionary distinction. Comparative genomics exposed diverse though non-unique repertories of antioxidant (e.g. catalase, superoxide dismutase and desulfoferrodoxin), and desiccation-resistance genes (including genes for maintaining osmotic pressure and repair of cell wall and membrane), with spp possessing the lowest gene abundance and diversity for oxygen and desiccation tolerance. Nevertheless, the occurrence of a Class I methanogen such as in arid soils challenges the notion that members of this class are less oxygen tolerant than Class II. Pangenome analysis further uncovered unique genes enriched in membrane-associated functions and potentially non-functional stress-related genes. Via a global metagenomic survey we find that methanogens are underdetected in dryland soils, likely due to sequencing depth limitations. Our findings highlight previously overlooked methanogen diversity and ecological plasticity in oxic and desiccated habitats, and emphasize the need for further studies to elucidate their survival strategies. |
| title | Cultivation and genomic characterization of novel methanogens from arid desert biocrust. |
| url | https://pubmed.ncbi.nlm.nih.gov/41696028/ |