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. 1976 Aug;127(2):763–769. doi: 10.1128/jb.127.2.763-769.1976

Ineffective and non-nodulating mutant strains of Rhizobium japonicum.

R J Maier, W J Brill
PMCID: PMC232982  PMID: 986388

Abstract

Mutant strains of Rhizobium japonicum that were unable to allow the Corsoy cultivar of soybean to reduce acetylene or fix N2 were isolated. These strains grow as well as the wild type in a variety of media. Mutant strains SM1 and SM2 did not form nodules on the host plant; however, they reduced acetylene in the nonsymbiotic assay. Strains SM3 and SM4 produced nodules that did not have the characteristic pink pigment caused by leghemoglobin. The nodules formed by these strains also were small. One mutant strain, SM5, produced large pink nodules. The lesion in this strain seems to be in the gene that specifies nitrogenase component II.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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