Bacteria that play a crucial role in converting atmospheric nitrogen into ammonia are called nitrogen-fixing bacteria. These tiny powerhouses are essential for life on Earth because they make nitrogen, a vital element for building proteins and nucleic acids, accessible to other organisms.

Here are some of the key nitrogen-fixing bacteria:

• Rhizobia: These bacteria form symbiotic relationships with legumes, like peas, beans, and lentils. They live in root nodules and fix nitrogen in exchange for sugars produced by the plant.📷Opens in a new window📷www.krugerseed.comRhizobia bacteria
• Cyanobacteria: These photosynthetic bacteria are found in both aquatic and terrestrial environments. They can fix nitrogen independently or in symbiosis with other organisms, like plants and fungi.📷Opens in a new window📷microbiologynotes.comCyanobacteria bacteria
• Frankia: These bacteria form symbiotic relationships with certain trees and shrubs, like alder and casuarina. They fix nitrogen in root nodules similar to Rhizobia.📷Opens in a new window📷en.wikipedia.orgFrankia bacteria

Nitrogen-fixing bacteria are incredibly important to the Earth's ecosystem for several reasons:

• They replenish nitrogen in the soil: Nitrogen is constantly lost from the soil through processes like leaching and erosion. Nitrogen-fixing bacteria help to replenish these losses and maintain soil fertility.
• They support plant growth: Plants need nitrogen to grow and reproduce. Nitrogen-fixing bacteria provide plants with the nitrogen they need to thrive, which supports overall plant biodiversity and productivity.
• They contribute to food production: Legumes, which have symbiotic relationships with nitrogen-fixing bacteria, are an important source of protein for humans and animals. The nitrogen fixed by these bacteria contributes to the nutritional value of these crops.
• They maintain the nitrogen cycle: Nitrogen-fixing bacteria are a key part of the nitrogen cycle, the process by which nitrogen moves through the environment. They convert atmospheric nitrogen into a form that can be used by other organisms, and they also help to return nitrogen to the atmosphere when they die.

In conclusion, nitrogen-fixing bacteria are tiny but mighty players in the Earth's ecosystem. They play a vital role in making nitrogen available to other organisms, supporting plant growth, and maintaining the nitrogen cycle. Without these hardworking bacteria, life on Earth would be very different!

Dr Murtadha Shukur thank you for your contribution to discussion

Some well-known examples of nitrogen-fixing bacteria include species of the genera Rhizobium, Azotobacter, and Clostridium. Bacteria which reduce atmospheric nitrogen into ammonia are called as Nitrogen Fixing Bacteria (NFB). A wide diversity of nitrogen fixing bacteria are present in environment. A noteworthy and very important feature of Azotobacter and Nitrobacter are their ability to "fix" atmospheric nitrogen, by the conversion of this elemental form to ammonia. Plants are able to utilize ammonia as a nutrient which is very significant for the plant's growth and development.Rhizobium bacteria are soil microbes that can transform atmospheric nitrogen into a dissolved compound. Rhizobium bacteria are found in the root nodules of woody plants. The rhizobium plays a major role in the nitrogen cycle as well as ecosystem services. De-Nitrification: Nitrogen in its nitrate form (NO3–) is converted back into atmospheric nitrogen gas (N2) by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions. These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.Nitrogen-fixing bacteria play an important role in life on Earth. All life requires nitrogen in order to live, as an important element of DNA and many proteins that make up living things. 90% of the nitrogen available for use by living things is fixed by nitrogen-fixing bacteria. Bacteria are needed in the nitrogen cycle because the waste products of most animals cannot be directly absorbed by plants, creating a potential roadblock in the ecological process. Because plants and animals are not able to use nitrogen gas in that form. For nitrogen to be available to make proteins, DNA, and other biologically important compounds, it must first be converted into a different chemical form. The bacteria that convert atmospheric nitrogen into ammonia are known as nitrogen-fixing bacteria. These bacteria play a crucial role in the nitrogen cycle by converting atmospheric nitrogen gas (N2) into a form of nitrogen, such as ammonia (NH3), that can be utilized by plants and other organisms. Nitrogen-fixing bacteria are prokaryotic microorganisms that are capable of transforming nitrogen gas from the atmosphere into “fixed nitrogen” compounds, such as ammonia, that are usable by plants.