Mutants of Rhizobium japonicum with Increased Hydrogenase Activity

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Science  03 Jun 1983:
Vol. 220, Issue 4601, pp. 1064-1065
DOI: 10.1126/science.220.4601.1064


Some strains of Rhizobium japonicum can use hydrogen as an energy source for growth under microaerophilic conditions. Mutant strains have been selected that use hydrogen in the presence of high partial pressures of oxygen. The mutants contain more hydrogenase than the parent strain, both as free-living cells and as bacteroids in nitrogen-fixing soybean root nodules.