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Science 3 June 1983:
Vol. 220. no. 4601, pp. 1064 - 1065
DOI: 10.1126/science.220.4601.1064
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Articles

Mutants of Rhizobium japonicum with Increased Hydrogenase Activity

DAVID MERBERG 1 and ROBERT J. MAIER 1

1 Department of Biology, Johns Hopkins University, Baltimore, Maryland 21218

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.

Submitted on November 29, 1982
Revised on January 28, 1983

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Science. ISSN 0036-8075 (print), 1095-9203 (online)