Enrichment and characterization of a nitric oxide-reducing microbial community in a continuous bioreactor.

ABSTRACT: Nitric oxide (NO) is a highly reactive and climate-active molecule and a key intermediate in the microbial nitrogen cycle. Despite its role in the evolution of denitrification and aerobic respiration, high redox potential and capacity to sustain microbial growth, our understanding of NO-reducing microorganisms remains limited due to the absence of NO-reducing microbial cultures obtained directly from the environment using NO as a substrate. Here, using a continuous bioreactor and a constant supply of NO as the sole electron acceptor, we enriched and characterized a microbial community dominated by two previously unknown microorganisms that grow at nanomolar NO concentrations and survive high amounts (>6 µM) of this toxic gas, reducing it to N₂ with little to non-detectable produ

SUBMITTER: Garrido-Amador P 

PROVIDER: S-EPMC10390337 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature