Purple and green(Anoxygenic Phototrophic) Bacteria Purple sulfur bacteria deposit sulfur and oxidize it to sulfate, commonly found in anoxic zones of lakes as well as In sulfur springs, Ectothiorhodospira deposits sulfur externally, grows halophilically and at high ph, found in saline lakes, saltern, and bodies of water high in salt limited ability to utilize organic compounds as C source for phototrophic growth Thiocapsa grows chemoorganotrophically on acetate
Purple and Green (Anoxygenic Phototrophic) Bacteria Purple sulfur bacteria deposit sulfur and oxidize it to sulfate, commonly found in anoxic zones of lakes as well as in sulfur springs, Ectothiorhodospira deposits sulfur externally, grows halophilically and at high pH, found in saline lakes, saltern, and bodies of water high in salt, limited ability to utilize organic compounds as C source for phototrophic growth Thiocapsa grows chemoorganotrophically on acetate
Purple and green(Anoxygenic Phototrophic) bacteria Purple sulfur bacteria Thiospirillumjenense a Chromatiumokenii Thiopedia rosea 33 Thiocapsa ca 068 8
Purple and Green (Anoxygenic Phototrophic) Bacteria Purple sulfur bacteria Chromatium okenii Thiospirillum jenense Thiocapsa Thiopedia rosea
Chemolithotrophs: Nitrifying Bacteria Bacteria able to grow chemolithotrophically at the expense of reduced inorganic nitrogen compounds 1) Nitrosifying bacteria: NI3+02 NO2+H+H20 (2)Nitrifying bacteria: NO2+O2 NO3 No chemolithotroph is known that will carry out the complete oxidation of ammonia to nitrate (1)Nitrosomonas, Nitrosococcus, Nitrosospira (2) Nitrobacter, Nitrospira, Nitrococcus They are members of the purple bacteria
Chemolithotrophs: Nitrifying Bacteria Bacteria able to grow chemolithotrophically at the expense of reduced inorganic nitrogen compounds (1) Nitrosifying bacteria: NH3 + O2 NO2 - + H+ + H2O (2) Nitrifying bacteria: NO2 - + O2 NO3 - No chemolithotroph is known that will carry out the complete oxidation of ammonia to nitrate (1) Nitrosomonas, Nitrosococcus, Nitrosospira (2) Nitrobacter, Nitrospira, Nitrococcus They are members of the purple bacteria
Chemolithotrophs: Sulfur-and Iron-Oxidizing Bacteria Members of purple bacteria Have ability to grow chemolithotrophically on reduced sulfur compounds Only six genera: Thiobacillus, Thiosphaera Thiomicrospira, Thermothrix, Beggiatoa and Sulfolobus(Archaea) have been cultured Two groups: neutrophilic and acidophilic The acidophilic group can grow chemolithotrophically using ferrous iron as electron d onor Thiobacillus ferrooxidans has been used for leaching
Chemolithotrophs: Sulfur- and Iron-Oxidizing Bacteria Members of purple bacteria Have ability to grow chemolithotrophically on reduced sulfur compounds Only six genera: Thiobacillus, Thiosphaera, Thiomicrospira, Thermothrix, Beggiatoa and Sulfolobus (Archaea) have been cultured. Two groups: neutrophilic and acidophilic The acidophilic group can grow chemolithotrophically using ferrous iron as electron donor Thiobacillus ferrooxidans has been used for leaching
Chemolithotrophs: Hydrogen-Oxidizing bacteria Capable of growing with H, as sole electron donor and O2 as electron acceptor, Many of them can also grow autotrophically using Calvin cycle to fix CO2, All contain hydrogenase for binding H2 and use it to produce ATP, Can grow both chemoorganotrophs and chemolithotrophs Most are obligate aerobes, but prefer microaerobic conditions when growing chemolithotrophically on H2, Some can grow on CO, Best studied Alcaligenes eutrophus, or Ralstonia eutropha
Chemolithotrophs: Hydrogen-Oxidizing Bacteria Capable of growing with H2 as sole electron donor and O2 as electron acceptor, Many of them can also grow autotrophically using Calvin cycle to fix CO2, All contain hydrogenase for binding H2 and use it to produce ATP, Can grow both chemoorganotrophs and chemolithotrophs, Most are obligate aerobes, but prefer microaerobic conditions when growing chemolithotrophically on H2, Some can grow on CO, Best studied Alcaligenes eutrophus, or Ralstonia eutropha