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What organisms can perform nitrogen fixation?
Two kinds of nitrogen-fixing microorganisms are recognized: free-living (nonsymbiotic) bacteria, including the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic (symbiotic) bacteria such as Rhizobium, associated with leguminous plants.
What enzymes are involved in nitrogen fixation?
enzyme nitrogenase
Nitrogen fixation is carried out by the enzyme nitrogenase, which are found in microbes.
Which aquatic fern performs nitrogen fixation?
Azolla
Azolla is an aquatic fern which is inoculated in the rice field to increase the yield. Azolla contains Nostoc and Anabaena (BGA) in its leaf cavities which perform nitrogen fixation.
What enzymes are involved in nitrogen assimilation?
Several enzymes and intermediates are involved in nitrogen assimilation. Here we provide an overview of the important enzymes such as nitrate reductase, nitrite reductase, glutamine synthase, GOGAT, glutamate dehydrogenase, and alanine aminotransferase that are involved in nitrogen metabolism.
Which is aquatic fern?
Salvinia is an aquatic fern with both annual (e.g., S. natans) and perennial species (e.g., S. molesta). The plant body consists of a floating stem bearing two rows of large green hairy leaves on the upper surface and highly branched leaf roots on the lower surface.
What is nitrogen assimilation?
Assimilation. Assimilation is the process by which plants and animals incorporate the NO3- and ammonia formed through nitrogen fixation and nitrification. Plants take up these forms of nitrogen through their roots, and incorporate them into plant proteins and nucleic acids.
What is involved in assimilation?
Assimilation is the process of absorption of vitamins, minerals, and other chemicals from food as part of the nutrition of an organism. In humans, this is always done with a chemical breakdown (enzymes and acids) and physical breakdown (oral mastication and stomach churning).