Genetic Modifications of N2-Fixing Systems

Abstract
Detailed genetic analysis of the nitrogen fixation (nif) genes of Klebsiella pneumoniae shows that the ability to fix N2 and regulate the synthesis of an active nitrogenase involves a very complex process. Mutant strains of other N2-fixing bacteria, such as Azotobacter vinelandii and Rhizobium, may be useful for agricultural applications.