Download - Colorless Sulfur Bacteria
Colorless Sulfur Bacteria
José Rojas Echenique
Colorless Sulfur?Colorless:
Non-phototrophic
Sulfur:Sulfur oxidizing
Mats
O2
H2S
Thiovulum veilThanks Olivia!
Thiovulum at the gradientThanks Isabella!
Excellent swimmersSchulz and Jørgensen, 2001
Thiovulum slime threadThanks Isabella!
Business PlanStraddling the gradients
• Excellent swimming: stay at the optimal spot
• Slime threads: the veil makes a better interface
BeggiatoaThanks Olivia!!
BeggiatoaMubmann et al. 2007
Business PlanBeing in two places at the same time, and at two times in the same place
• Long filaments: sulfur and electron donor in different places
• Vacuole store: sulfur and electron donor at different times
• Gliding: two places at two times also works, they reach through the boundary layer
Enrichments
S2O32-
NO3-
S2O32-
O2
Gradient tubes
O2
H2S
2So + 3O2 + 2H2O 2SO42- + 4H+
Gradient tubes
From Aaron’s gradient tube
Gradient tubes
Anaerobic Thiosulfate Plates
S2O32-
NO3-
Anaerobic Thiosulfate Plates
S2O32- + 2H2O SO4
2- + H2S
Thiosulfate “Fermentation”(Desulfovibrio sulfodismutans, Desulfu ocapsa thiozymogenes)
Anaerobic Thiosulfate Plates
Thanks Katrin!
Aerobic Thiosulfate Plates
S2O32- O2
Aerobic Thiosulfate Plates
S2O32- + 2O2 + H2O SO4
2- + H2SO4
4S2O32- + O2 + 2H2O 2SO4
2- + 4OH-
2S2O32- + 7O2 + 6H2O
2SO42- + 6H2SO4
Aerobic Thiosulfate Plates
Thanks Veronica!
Colorless Sulfur Bacteria
Sulfur Cycle