We know that nitrogen fixing bacteria fix nitogen from atmosphere.I want to know why bacteria fix nitrogen. Bacteria need nitrogen for their growth for this reason nor their metabolism.Is it possible to live bacteria without nitrogen.
The bacteria need nitrogen for their growth, so they must have ability to use nitrogen from the atmosphere,the bacteria contains the enzyme nitrogenase, which reduce atmospheric oxygen to ammonia and the to amino acids and protein. there is now an active research to transfer the enzyme nitrogenase to higher plants, so that they make use of atmospheric nitrogen, in stead of nitrogenous fertilizers.
Nitrogen-fixing bacteria are microorganisms present in the soil or in plant roots that change nitrogen gases from the atmosphere into solid nitrogen compounds that plants can use in the soil.
Nitrogen fixation is a process by which nitrogen (N2) in the Earth's atmosphere is converted into ammonia (NH3).
Nitrogen fixation,is essential for all forms of life because nitrogen is required to biosynthesize basic building blocks of plants, animals and other life forms, . Nitrogen fixation occurs naturally in the soil by nitrogen fixing bacteria (for example, Azotobacter affiliated with some plants, especially legumes). Some nitrogen-fixing bacteria have very close relationships with plants, referred to as symbiotic nitrogen fixation. Looser relationships between nitrogen-fixing bacteria and plants are often referred to as associative or non-symbiotic, as seen in nitrogen fixation occurring on rice roots.