BIOL240 Lecture Notes - Lecture 8: Alphaproteobacteria, Purple Bacteria, Anoxygenic Photosynthesis
Document Summary
Purple phototropic bacteria, methanotrophs, pseudomonas type organisms, free-living aerobic nitrogen-fixing organisms, neisseria and its relatives, enteric bacteria, Divided into several different groups based on the sequences of the. Many members are photosynthetic or phototrophs: alpha, beta, gamma all have phototrophs where as the epsilon and delta have a loss of photosynthetic ability, purple phototrophic bacteria: Often pigmented because pigments are important in photosynthesis, they"re not green because there are a number of accessory pigments, Oxygen inhibits photosynthesis so that these microorganisms only photosynthesize under anaerobic conditions, some members can grow aerobically using respiration but no photosynthesis under aerobic condition, Phototrophs (use a light as an energy source: some can fix carbon dioxide from the energy gained from photosynthesis, Photoautotrophs: some can"t fix their own co2 so they need carbon from an organic source, Photosynthesis takes place in intracellular membrane folds,
