What does psb mean?

Photosynthetic bacteria (PSB) is the general name of prokaryotes with primitive light energy synthesis system. It is a kind of microorganism that uses light as energy source and can use organic matter, sulfide and ammonia in nature as hydrogen donors and carbon sources for photosynthesis under anaerobic illumination or aerobic darkness. PSB is also the abbreviation of Pacific Science Council.

Extended data:

In nature, there are nearly 100 PSB bacteria per milliliter in fresh water and seawater. They can directly utilize organic acids, amino acids, ammonia and sugars under the condition of light in water, so as to proliferate themselves and purify water together.

1, which can effectively absorb harmful substances such as ammonia nitrogen, nitroso nitrogen and hydrogen sulfide, promote organic matter circulation and purify water quality.

2. Forming dominant communities, maintaining the microecological balance of water bodies, inhibiting the reproduction of pathogenic microorganisms and preventing the onset of aquatic animals can overcome the shortcomings of disinfectants and effectively degrade water bodies.

Harmful chemicals.

3. Cultivate zooplankton, increase natural bait and reduce bait fraction.

4. Improve the transparency of water, promote the photosynthesis of phytoplankton, and indirectly increase oxygen.

5. Promote the growth rate of aquatic animals, improve their metabolism, enhance their immune system and improve their immunity and disease resistance.

6. Cyanobacteria are closely related to the quality of water environment. When the water grows vigorously, it can turn the water into blue or other colors, and some cyanobacteria can smell like grass or mildew. Microcystis aeruginosa and ANABAENA are common cyanobacteria in lake waves. The proliferation of cyanobacteria in some species will cause "water bloom" (fresh water) or "red tide" (seawater), which will lead to the deterioration of water quality and a series of environmental problems.

7. Five billion years ago, the earth was originally an anaerobic environment, and the transformation from anaerobic environment to aerobic environment was due to the appearance of cyanobacteria and the production of oxygen. Scientists believe that chloroplasts in plants come from cyanobacteria swallowed by cells and coexist with them. Nowadays, photosynthetic bacteria have made great contributions to the vibrant life world.

References:

Baidu encyclopedia of photosynthetic bacteria