Hydrogen-dependent dissimilatory nitrate reduction to ammonium enables growth of Campylobacterota isolates.

ABSTRACT: Dissimilatory nitrate reduction to ammonium (DNRA) is a key process used by diverse microorganisms in the global nitrogen cycle. For long, DNRA has been considered primarily as an organotrophic reaction, despite evidence that oxidation of inorganic electron donors also supports DNRA. Evidence of DNRA coupling with molecular hydrogen (H2) oxidation has been reported for several microbial isolates; however, the underlying physiology of the microbial process remains understudied. In this study, we report the isolation of two Campylobacterota strains, Aliarcobacter butzleri hDNRA1 and Sulfurospirillum sp. hDNRA2, which grow using H2 as the sole electron donor for DNRA, and physiological insights gained from a close examination of hydrogenotrophic DNRA in these isolates. In both batch and conti

SUBMITTER: Heo H 

PROVIDER: S-EPMC12286921 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature