Given the host specificity of rhizobia to legumes, has anyone ever isolated more than one species or strains of rhizobia from a single nodule?

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Majid Dashti

Dear Ahmed Idris Hassen

I had studied about salt and drought Sinorhizobium meliloti strains isolated from annual and perennial Medicago species from single nodules and soil as well and I found there are different reactions in salinity and drought.

Ray Collier

You might find helpful the following containing a very nice discussion regarding mixed infection in infection threads and nodules: Infection and Invasion of Roots by Symbiotic, Nitrogen-Fixing Rhizobia during Nodulation of Temperate Legumesby Daniel J. Gage in MICROBIOLOGY AND MOLECULAR BIOLOGY REVIEWS, June 2004, p. 280–300