Short Communication

Biology and Fertility of Soils

, Volume 39, Issue 4, pp 292-294

First online:

The effect of rhizobiophages on Sinorhizobium meliloti - Medicago sativa symbiosis

  • Mieczysław KowalskiAffiliated withDepartment of General Microbiology, M. Curie-Skłodowska University
  • , Wanda MałekAffiliated withDepartment of General Microbiology, M. Curie-Skłodowska University Email author 
  • , Jadwiga Czopska-DoleckaAffiliated withDepartment of General Microbiology, M. Curie-Skłodowska University
  • , Małgorzata SzlachetkaAffiliated withDepartment of General Microbiology, M. Curie-Skłodowska University

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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.

Keywords

Alfalfa Medicago sativa Nitrogen fixation Phage resistance Rhizobiophages