1.
Chemotactic autotrophic bacteria are also called chemotactic inorganic trophic bacteria or inorganic trophic bacteria. A microorganism that can grow and reproduce normally without relying on any organic nutrients. Such as nitrite bacteria, nitrate bacteria, sulfur bacteria, hydrogen bacteria and iron bacteria. Instead of getting energy from sunlight, they get chemical energy by oxidizing simple inorganic compounds and assimilating carbon dioxide for cell synthesis.
There are a considerable number of chemoautotrophic bacteria in the soil, which have a certain effect on material transformation. The energy needed is to reduce sulfur and nitrogen compounds, ferrous ions, hydrogen, methane, methanol and other carbon compounds.
Because carbon dioxide is the only carbon source, its normal life and population development depend more on the adequate supply of oxygen in its environment. This kind of bacteria plays a key role in maintaining the circulation of nitrogen, sulfur and other elements on the earth. Sulfate reducing bacteria play an important role in anaerobic corrosion of iron products and concrete.
2. Features
Microorganisms that use organic matter as carbon source, energy source and hydrogen donor are called chemotactic microorganisms, also known as chemotactic microorganisms. This type contains the most kinds of microorganisms and has the strongest effect. Most known bacteria, actinomycetes, all fungi and protozoa belong to this type. The specific nutritional requirements of chemotactic heterotrophic bacteria vary from species to species. The demand of different populations for carbon source, nitrogen source, mineral elements and auxin is very different.
3. Origin
A bacterium with respiratory chain can use hydrogen to activate hydrogen atoms, form NADH2, enter respiratory chain and produce ATP. This is a great progress in life! Because, earlier, organisms used organic substances to produce NADH2, and now they use inorganic substances to produce NADH2. This bacterium originally used hydrogen to obtain ATP. Life movement /←ATP←/ respiratory chain /NADH 2/ hydrogen
This kind of bacteria uses hydrogen to form NADH2, which enters the respiratory chain to produce ATP, which is much more than anaerobic respiration. It has great advantages. Because it can produce a large amount of ATP, it provides a premise for organisms to make organic matter from inorganic substances. So this kind of bacteria evolved into hydrogen bacteria, a kind of bacteria that can turn inorganic matter into organic matter and become autotrophic bacteria.