Article Figures & Data
Figures
- Fig. 1.
Growth parameters of D. oxyclinae in anaerobic chemostat culture and under 1% oxygen in the incoming gas grown on 20 mM lactate. (Upper) Protein concentration (■), cell numbers (□), dissolved oxygen (DO; ○, solid line); (Lower) concentrations of sulfide (□), sulfate (▴), and dissolved oxygen (○). Arrowheads indicate initiation of oxygen supply.
- Fig. 2.
Initial cell aggregation in a response to exposure to oxygen, based on changes in turbidity in cell suspension of D. oxyclinae after addition of oxygen to an anaerobically grown culture. Introduction of oxygen is marked by arrowheads. (a) Response to a single pulse of 87.3 μM oxygen; (b) response to continuous input of 5% oxygen. AU, arbitrary units.
- Fig. 3.
Confocal laser scanning in situ hybridization with fluorescein-labeled probe SRB385 (green) and autofluorescence of cyanobacteria (purple) in a horizontal transect of a Solar Lake cyanobacterial mat at a depth of 500 μm. (A) Clump of unicellular SRB; (B) filamentous Desulfonema-like SRB. Note additional scattered unicellular SRB.
- Fig. 4.
Phosphor imaging of a two-dimensional pattern of sulfate reduction obtained in a Solar Lake cyanobacterial mat by the silver foil technique, correlated to profiles of oxygen (○), sulfide (●), pH (•), and oxygenic photosynthesis rate (bars) as obtained by specific microelectrodes. The horizontal line indicates area of O2 and H2S overlap.
Tables
- Table 1.
Growth parameters of D. oxyclinae grown on 20 mM lactate in anoxic chemostat culture and under gassing with 1% oxygen
Stage Flow (h) Mean ± SD Reduction rate (μmol min−1cell−1 [10−11]) MPN (108 ml−1) Dissolved oxygen (μM) Sulfate consumed (mM) Residual sulfide (μM) Protein (mg liter−1) Cells (108ml−1) Protein Oxygen respiration rate (μmol of O2 min−1 cell−1[10−11]) SO42−, calculated (mean ± SD) S2O32−, measureda Per cell (mg [10−11]) Per mol of SO42− consumed (mg mol−1) Calculated Measureda I 122–436 0.0 9.8 ± 0.1 129 ± 11 22.2 ± 2.6 4.1 ± 0.3 57.9 ± 5 2.4 ± 0.1 1.9 2.0 ± 0.2 1.2 3.1 (0.8–3.6b) II 436–478 0.7 ± 0.2 5.8 ± 0.4 65 ± 13 23.4 ± 0.5 3.8 ± 0.6 61.2 ± 9.9 3.4 ± 0.8 3.3 ± 0.5 NDc 1.6 ± 0.4 ND 2.5 (0.8–2.8) III 478–575 0.5 ± 0.1 9.4 ± 0.3 69 ± 6 32.8 ± 3.9 3.6 ± 0.3 82.7 ± 18.6 4.4 ± 1.2 9.7 ± 1.2 3.4 1.7 ± 0.5 2.2 3.9 (1.3–4.5) IV 575–742 0.7 ± 0.5 9.3 ± 0.4 97 ± 11 60.1 ± 19.2 6.4 ± 2.1 97.2 ± 20.4 6.5 ± 2.3 6.0 ± 2.3 1.7 1.4 ± 0.5 6.3 13.6 (4.5–15.6)
