, Volume 39, Issue 4, pp 292-294
Date: 24 Jan 2004

The effect of rhizobiophages on Sinorhizobium meliloti - Medicago sativa symbiosis

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Abstract

Using Tn5 mutagenesis of lysogenic Sinorhizobium meliloti strain L5–30 (φL54), three neomycin-resistant transconjugants differing in phage-resistance profiles were isolated. Two of them increased the dry weight of plants and were capable of establishing root nodules, whereas the third one was ineffective. The bacterium-phage interaction did not have observable consequences in the Medicago sativa - S. meliloti symbiosis because it did not affect the number of nodules on M. sativa or plant dry weight.