Uncultured Nitrospina-like species are major nitrite oxidizing bacteria in oxygen minimum zones.

ABSTRACT: Oxygen minimum zones (OMZs) are marine regions where O₂ is undetectable at intermediate depths. Within OMZs, the oxygen-depleted zone (ODZ) induces anaerobic microbial processes that lead to fixed nitrogen loss via denitrification and anammox. Surprisingly, nitrite oxidation is also detected in ODZs, although all known marine nitrite oxidizers (mainly Nitrospina) are aerobes. We used metagenomic binning to construct metagenome-assembled genomes (MAGs) of nitrite oxidizers from OMZs. These MAGs represent two novel Nitrospina-like species, both of which differed from all known Nitrospina species, including cultured species and published MAGs. Relative abundances of different Nitrospina genotypes in OMZ and non-OMZ seawaters were estimated by mapping metagenomic reads to newly cons

SUBMITTER: Sun X 

PROVIDER: S-EPMC6776041 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature