Article Figures & Data
Figures
- FIG 1
Corrosion and methanogenesis in the cultures of the soil microbial community with Fe(0) granules. (A) Generation of CH4 was monitored during the incubation of a paddy soil microbial community in the presence (filled triangles) and absence (filled diamonds) of Fe(0) granules. The data of the abiotic controls (inoculated with sterilized soil) are also shown (open circles). Data are presented as the means of the results of three independent cultures, and error bars represent standard deviations. mmoll−1, millimoles per liter. (B and C) The photographs were taken after 50 days of incubation of the abiotic control (B) and paddy soil microbial community (C) in the presence of Fe(0) granules.
- FIG 2
Metabolites generated in the enrichment cultures. (A) Generation of Fe(II) from Fe(0) granules by the enrichment cultures and in the abiotic controls. (B) Generation of H2 in the abiotic controls with Fe(0) granules. The approximation curve estimated by the least-squares method is given. (C and D) Acetate, CH4, and H2 production in the Fe(0) (C) and Fe(0)+BES (D) enrichments. The dashed lines represent the abiotic corrosion rate calculated from the abiotic H2 production rate shown in panel B. Data are presented as the means of the results of three independent cultures, and error bars represent standard deviations.
- FIG 3
Phylogenetic distribution of bacterial (A) and archaeal (B) 16S rRNA gene clones recovered from the H2, Fe(0), and Fe(0)+BES enrichments.
- FIG 4
Acetate (A) and Fe(II) (B) production from Fe(0) granules by pure cultures of acetogenic bacteria. The dashed line in panel A represents the abiotic corrosion rate calculated from the abiotic H2 production rate shown in Fig. 2B. Data are presented as the means of the results of three independent cultures, and error bars represent standard deviations.
Additional Files
Supplemental material
Files in this Data Supplement:
- Supplemental file 1 -
Metabolic profiles of the H2 enrichments with H2 gas as the sole electron donor (Fig. S1) and bacterial (Table S1) and archaeal (Table S2) phylotypes detected in the enrichment cultures.
PDF, 37K
- Supplemental file 1 -
