Who discovered Azotobacter?
Who discovered Azotobacter?
Martinus Beijerinck
Azotobacter chroococcum is a bacterium that has the ability to fix atmospheric nitrogen. It was discovered by Martinus Beijerinck in 1901, and was the first aerobic, free-living nitrogen fixer discovered.
Which disease is caused by Azotobacter?
Ten cases of Azotobacter keratitis were identified at the Baylor College of Medicine and Cullen Eye Institute, Houston, from 1972 to 1980. Azotobacter are large, pleomorphic, aerobic, Gram-negative rods of the family Azotobacteraceae.
How is Azotobacter isolated?
2.2 Determination of Azotobacter The Azotobacter was isolated from the soil. Isolated the bacteria from the rhizosphere soil by making a series of dilution of soil from 10-1 to 10-7 on Azotobacter media and incubation for 48 h at 30ºC.
Where can you find Azotobacter?
Azotobacter representatives can commonly be found in soil, water, sediments, and plant roots (Aquilanti et al., 2004). Azotobacter species are generally found in slightly acidic to alkaline soils, which often governs the occurrence of certain species (Becking, 2006).
How does Azotobacter protect nitrogenase?
Cell Structure and Metabolism The cells’ uniquely high respiration rates allow the normally oxygen-sensitive nitrogenase to experience limited oxygen exposure. Azotobacter is also capable of producing a protein which protects the nitrogenase from sudden oxygen-provoked stress.
What is Azotobacter biofertilizer?
Azotobacter is a free-living nitrogen-fixing bacterium, which is used as a biofertilizer in the cultivation of most crops. The shelf life of the biofertilizer is six months from date of manufacture. The Process requires locally available plant, machinery and raw materials for manufacture.
How is Azotobacter used for biofertilizer production?
Azotobacter spp: These bacteria utilize atmospheric nitrogen gas for their cell protein synthesis. This cell protein is then mineralised in soil after the death of Azotobacter cells thereby contributing towards the nitrogen availability of the crop plants.
What is Azotobacter Biofertilizer?
What is the other name of Martinus Beijerinck?
Alternative Title: Martinus Willem Beijerinck. Martinus W. Beijerinck, in full Martinus Willem Beijerinck, (born March 16, 1851, Amsterdam, Netherlands—died January 1, 1931, Gorssel), Dutch microbiologist and botanist who founded the discipline of virology with his discovery of viruses.
What did Beijerinck contribute to microbiology?
Beijerinck also developed the principles of enrichment culture, which allowed a better understanding of the role of microorganisms in natural processes. He received international recognition for this discovery. Beijerinck was awarded the Leeuwenhoek Medal by the Dutch Royal Academy of Sciences in 1905.
Who discovered Azotobacter chroococcum?
The genus Azotobacter was discovered in 1901 by Dutch microbiologist and botanist Martinus Beijerinck, who was one of the founders of environmental microbiology. He selected and described the species Azotobacter chroococcum – the first aerobic, free-living nitrogen fixer.
What is Azotobacter?
Azotobacter is a genus of free-living or motile diazotrophic bacteria that is oval or spherical and forms thick-walled cysts. They are aerobic and free-living soil microbes that play a pivotal role in nitrogen fixation. The azotobacter is primarily found in alkaline soils and aquatic environments and also on some plants.