MICRB265 Lecture Notes - Lecture 8: Human Microbiota, Yeast, Acetoin
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25 Apr 2018
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Nutritional diversity: carbon and energy sources: definition of prefixes, energy sources: phototrophs use light energy plus an electron source (e. g. , h2o or h2s, oxygenic photosynthesis splits water to release o2, anoxygenic photosynthesis uses other electron sources e. g. h2s. S (elemental sulfur) and does not release o2 e. g. thiomargarita namibiensis, thiospirillum jenense chemotrophs use chemical energy. The energy source prefix is named first, then the c source prefix. Note that the terms below are simplified compared with those used in the textbook. Photoautotrophs: use light energy to fix co2 as their carbon source; e. g. most photosynthetic organisms, including cyanobacteria, algae, green plants. Photoheterotrophs: use light energy and organic compounds as c source. Chemoautotrophs: use chemical energy (redox reactions using inorganic or organic compounds) to fix co2 as their c source. Chemoheterotrophs: use chemical energy (redox reactions using inorganic or organic compounds) to assimilate organic c as carbon source. These are the most common of the organisms that we study in the lab.
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