Biological N Inputs

摘要: Publisher Summary This chapter provides an overview of biological nitrogen fixation (BNF). BNF is a process exclusively restricted to the prokaryotes domains archaea and bacteria. However, there are many examples symbiotic associations that have developed between eukaryotes circumvent eukaryotes' needs for exogenous supply fixed nitrogen. Bacteria use N2 as sole source called “diazotrophs.” Although only limited number bacterial species fix N2, they represent wide variety phylogenetically physiologically distinct types occupy different ecological niches. mediated by enzyme complex “nitrogenase,” which composed two proteins (dinitrogenase nitrogenase reductase). There three forms differ in their requirements molybdenum (Mo), vanadium (V), or iron (Fe) critical metallic component cofactor associated with catalytic site. The explains concepts fixation, free-living N2-fixing bacteria, associative Phototrophic bacteria well legumes Rhizobia discussed along biotechnology BNF.