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PHOTOSYNTHESIS CLASSIFYING ORGANISMS ACCORDING TO THEIR CARBON SOURCE AND ENERGY SUPPLIES
Type of Organism |
Carbon Source |
Energy Source |
Electron Donors |
Examples |
Photolithotrophs |
CO2 |
Light |
Inorganic compounds
(H2O, H2S, S) |
Green plants, photosynthetic protoctists, blue-greens, photosynthetic bacteria |
Photoorganotrophs |
Organic compounds |
Light |
Organic compounds |
Non-sulphur purple bacteria |
Chemolithotrophs |
CO2 |
Redox reactions |
Inorganic compounds
(H2, S, H2S, Fe2+, NH3) |
Hydrogen, sulphur, iron and denitrifying bacteria |
Chemoorganotrophs |
Organic compounds |
Redox reactions |
Organic compounds
(e.g. Glucose) |
Animals, fungi, non-photosynthetic protoctists, saprophytic and parasitic bacteria |
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© Paul Billiet 2009 |
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