Hultman, Jenni


Publications
3

Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics

Citation
Pessi et al. (2023).
Names
“Sivonenia alaskensis”
Abstract
AbstractBenthic microbial mats dominated by Cyanobacteria are important features of polar lakes. Although culture-independent studies have provided important insights into their diversity, only a handful of genomes of polar Cyanobacteria have been sequenced to date. Here, we applied a genome-resolved metagenomics approach to data obtained from Arctic, sub-Antarctic, and Antarctic microbial mats. We recovered 22 unique metagenome-assembled genomes (MAGs) of Cyanobacteria, most of which are only d

Candidatus Nitrosopolaris, a genus of putative ammonia-oxidizing archaea with a polar/alpine distribution

Citation
Pessi et al. (2022). FEMS Microbes 3
Names
Nitrosopolaris Nitrosopolaris wilkesensis Ts “Nitrosopolaris nunavutensis” “Nitrosopolaris kilpisjaerviensis” “Nitrosopolaris rasttigaisensis”
Abstract
Abstract Ammonia-oxidizing archaea (AOA) are key players in the nitrogen cycle of polar soils. Here, we analyzed metagenomic data from tundra soils in Rásttigáisá, Norway, and recovered four metagenome-assembled genomes (MAGs) assigned to the genus ‘UBA10452’, an uncultured lineage of putative AOA in the order Nitrososphaerales (‘terrestrial group I.1b’), phylum Thaumarchaeota. Analysis of other eight previously reported MAGs and publicly available amplicon sequencing data reveale

Candidatus Nitrosopolaris, a genus of putative ammonia-oxidizing archaea with a polar/alpine distribution

Citation
Pessi et al. (2021).
Names
Abstract
AbstractAmmonia-oxidizing archaea (AOA) are key players in the nitrogen cycle. Here, we report four novel metagenome-assembled genomes (MAGs) assigned to the genus “UBA10452”, an uncultured lineage of putative AOA in the family Nitrososphaeraceae. Analysis of other eight previously reported MAGs and publicly available amplicon sequencing data revealed that the UBA10452 lineage is predominantly found in acidic polar and alpine soils. We propose a novel Candidatus genus, Ca. Nitrosopolaris, with f