Enhanced Nitrous Oxide Production in Denitrifying Dechloromonas aromatica Strain RCB Under Salt or Alkaline Stress Conditions.

ABSTRACT: Salinity and pH have direct and indirect impacts on the growth and metabolic activities of microorganisms. In this study, the effects of salt and alkaline stresses on the kinetic balance between nitrous oxide (N₂O) production and consumption in the denitrification pathway of Dechloromonas aromatica strain RCB were examined. N₂O accumulated transiently only in insignificant amounts at low salinity (≤0.5% NaCl) and circumneutral pH (7.0 and 7.5). As compared to these control conditions, incubation at 0.7% salinity resulted in substantially longer lag phase and slower growth rate, along with the increase in the amounts of transiently accumulated N₂O (15.8 ± 2.8 μmoles N₂O-N/vessel). Incubation at pH 8.0 severely inhibited growth and resulted

SUBMITTER: Han H 

PROVIDER: S-EPMC6593283 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature