In this article we will discuss about the metabolism of nitrogen fixation. Nitrogenase enzyme, which is chiefly associated with fixing of nitrogen, is inactivated by oxygen. This inactivation may be reversible or irreversible, the latter clearly being a more serious problem. How it arose is an open question? One suggestion is that oxygen sensitivity results […]
Metabolism of Nitrogen Fixation | Microbiology
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Genetics of Nitrogen Fixing Microorganisms | Microbiology
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In this article we will discuss about the genetics of nitrogen fixing microorganisms. 1. Bacterial Nodulation Genes and Regulation of nod Gene Expression: In Rhizobium species, nodulation genes together with other symbiotic genes are located on large-plasmids (Sym plasmids). Sym plasmids vary from 50 to over 600 kb in R. leguminosarum bv. trifoli to 1200 […]
Process of Nitrogen Fixation in Microorganisms | Microbiology
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In this article we will discuss about the process of nitrogen fixation in microorganisms. The symbiotic association of cyanobacteria with fungi (lichen), cyanobacteria with bryophytes (Anthoceros), with pteridophytes, (Azolla) with gymnosperms (coralloid root of Cycas) and bacteria (Rhizobium Brady-rhizobium, Azorhizobium, Sino-rhizobium, Ensifer and Mesorhizobium etc.) with leguminous plants are under mutual beneficial relationship (symbiosis) in […]
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