MBIO 3280 Lecture Notes - Lecture 12: Cyanobacteria, Nitrosomonas, Sulfur

• School: University of Manitoba
• Department: Microbiology
• Course: MBIO 3280
• Professor: Vladimir Yurkov

Document Summary

Forms of carbon and transformations: methanogenesis, methanotrophs, carbon fixation, respiration. Many use the calvin cycle to fix co2. Litho = rock (inorganic electron source: key enzyme is rubisco, ribulose 1,5 bisphosphate carboxylase/oxygenase, converts co2 + e- to hexoses and glyceraldehyde-3-phosphate. Examples include: nitrifying bacteria, nitrosomonas and nitrobacter spp, sulfide oxidizers, thiobacillus and beggiatoa. Iron oxidizers: gallionella spp, hydrogen bacteria, hydrogenomonas spp, acetogens (acetyl-coa pathway, acetobacterium spp, sufate reducers (acetyl-coa pathway, desulfobacterium spp, methanogens (acetyl-coa pathway, methanobacterium spp. Either oxygenic (produce o2 as biproduct) or anoxygenic ( do not produce o2 use e- donation) Oxygenic photoautotrophs include: cyanobacteria, prochlorophytes, algae (chloroplasts, diatoms (one group of algae) fig. 23. 30: skeleton enriched in calcium, plants (chloroplasts) Autotrophy is usually by the calvin cycle. Need photosystem ii and rubisco to make sure the fixation occurs. Usually anaerobes include: purple sulfur bacteria, chromatium and ectothiorhodospira spp, purple non-sulfur bacteria, rhodopseudomonas spp, green sulfur bacteria, chlorobium spp, green non-sulfur bacteria, chloroflexus spp.