According to the properties of carbon source substances needed for microbial growth, microorganisms can be divided into autotrophic type and heterotrophic type. It can also be classified into chemical nutrition type and light nutrition type according to the different energy sources needed for microbial growth.
According to the different properties of hydrogen donors in the process of energy metabolism, it can be divided into four basic types, namely, organic nutrition, chemical energy inorganic nutrition, light energy inorganic nutrition and light energy organic nutrition.
Extended data:
Can use light as energy, CO? As a carbon source. A few microorganisms (including bacterial chlorophyll), such as cyanobacteria (including chlorophyll), red sulfur bacteria and green sulfur bacteria, can use light energy to synthesize organic substances needed by cells from carbon dioxide.
But this kind of bacteria need hydrogen sulfide in photosynthesis besides light energy. They get hydrogen from hydrogen sulfide, while higher plants get hydrogen from photolysis of water to reduce carbon dioxide.
Chemo-heterotrophy: Most bacteria live and grow in this nutrient type, and use organic matter as carbon source and energy for growth. According to the characteristics of heterotrophic microorganisms using organic matter, they can be divided into the following two types:
Saprophytic microorganisms: Use inanimate organic matter as carbon source for growth.
Parasitic microorganism: Parasitic in living cells, obtaining nutrients needed for growth from parasites.
Intermediate transitional microorganisms existing between parasitism and saprophytic are called facultative saprophytic or facultative parasitic.
Baidu Encyclopedia-Microbial Nutrition Types