Fig. 4: Bacterial taxa associated with genes involved in methane (CH4) oxidation (pmoA) and denitrification (nirS and nirK) in 13C-CH4 amended microcosms.
From: Metabolic coupling between soil aerobic methanotrophs and denitrifiers in rice paddy fields
A Quantitative distribution of the pmoA, nirS and nirK genes in 18 fractions from each CsCl gradient, covering a buoyant density range from 1.69 to 1.74 g ml−1; B The relative abundance (Z-score standardized) of the top 25 genera within the 13C-heavy fractions. Gene reads are derived from the entire buoyant density gradient of DNA fractions extracted from the three typical soils incubated with 12CH4 and 13CH4 for 40 days. The error bar in (A) represents the standard error of the triplicate samples (n = 3), and data are presented as mean values ± standard error. * in (B) indicates operational taxonomic units (OTUs) that exhibited significant enrichment in the heavy fractions of the 13C-labeled treatment compared to the heavy fractions in the corresponding 12C control based on Z-score. Source data are provided as a Source Data file.
