Mixotrophic cyanobacteria are critical active diazotrophs in polychlorinated biphenyl-contaminated paddy soil.

ABSTRACT: Biological nitrogen fixation by diazotrophs is a crucial biogeochemical process in global terrestrial ecosystems, especially in nitrogen-limited, organic-contaminated soils. The metabolic activities of diazotrophs and their ability to supply fixed nitrogen may facilitate the transformation of organic pollutants. However, the active diazotrophic communities in organic-contaminated soils and their potential metabolic functions have received little attention. In the current study, the relationship between biological nitrogen fixation and polychlorinated biphenyl (PCB) metabolism was analyzed in situ in paddy soil contaminated with a representative tetrachlorobiphenyl (PCB52). ¹⁵N-DNA stable isotope probing was combined with high-throughput sequencing to identify active diazo

SUBMITTER: Hu W 

PROVIDER: S-EPMC11924043 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature