Bacillus subtilis, a kind of Bacillus, has a single cell of 0.7 ~ 0.8× 2 ~ 3 microns and uniform color. No capsule, no periflagella, you can exercise. Gram-positive bacteria can form endogenous stress-resistant spores Spores are 0.6 ~ 0.9× 1.0 ~ 1.5 microns, oval to columnar, located in the center or slightly below the cell, and the cell does not swell after spore formation.
Rapid growth and reproduction, rough and opaque colony surface, dirty white or yellowish, when growing in liquid culture medium, wrinkles often form, which is aerobic bacteria.
2. bdellovibrio (heterotrophs)
Bdellovibrio is a kind of bacteria that parasitizes other bacteria and can cause their lysis. Although it is smaller than ordinary bacteria, it can pass through a bacterial filter and has a function similar to phage, but it is not a virus, it is indeed a kind of bacteria that can "eat" bacteria.
1962 was first discovered in Pseudomonas solanacearum, and then it was isolated from soil and sewage. Because they have a special predatory lifestyle and may play a role in determining the changes of microbial populations in nature, they have attracted the interest of many scientific workers.
3. Nitrifying bacteria (autotrophs)
Nitrifying bacteria belong to autotrophic bacteria and prokaryotes, including two completely different metabolic groups, nitrite and nitrate, including different forms of bacilli, cocci and spirochetes. Nitrite bacteria include bacteria belonging to the genera Nitromonas, Nitrococcus, Spirillum and Phyllanthus.
4. Iron bacteria (autotrophs)
Iron bacteria are a kind of bacteria that live in ponds, lakes, hot springs and other water bodies with high ferrous ion concentration, can oxidize ferrous salts into trivalent iron compounds, and can use the energy generated in this oxidation process to assimilate carbon dioxide for growth.
5. Sulfur bacteria (autotrophs)
Bacteria that can obtain energy from soluble or dissolved sulfur compounds in the growth process, and can oxidize low-valent sulfide into sulfur, and then oxidize sulfur into sulfate. Bacteria capable of oxidizing sulfur-containing compounds. According to the way of obtaining energy, it can be divided into phototrophic bacteria and chemotrophic bacteria.
Baidu Encyclopedia-heterotrophs
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