Melanin Production by Rhizobium Strains |
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| Authors: | M Teresa Cubo Ana M Buendia-Claveria John E Beringer and Jos E Ruiz-Sainz |
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| Institution: | M. Teresa Cubo, Ana M. Buendia-Claveria, John E. Beringer, and José E. Ruiz-Sainz |
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| Abstract: | Different Rhizobium and Bradyrhizobium strains were screened for their ability to produce melanin. Pigment producers (Mel+) were found among strains of R. leguminosarum biovars viceae, trifolii, and phaseoli, R. meliloti, and R. fredii; none of 19 Bradyrhizobium strains examined gave a positive response. Melanin production and nod genes were plasmid borne in R. leguminosarum biovar trifolii RS24. In R. leguminosarum biovar phaseoli CFN42 and R. meliloti GR015, mel genes were located in the respective symbiotic plasmids. In R. fredii USDA 205, melanin production correlated with the presence of its smallest indigenous plasmid. |
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