Abstract
Bacteriocinogenic and lysogenic strains of Rhizobium trifolii were grown with sensitive strains in sterile broth or peat culture. In broth culture the producing strains strongly suppressed growth of sensitive strains. In peat culture a considerable degree of suppression was also observed, the effect being stronger when the peat was “wet” than when it was “damp”. Apparently, conditions which favour growth in peat also favour dominance by bacteriocinogenic or lysogenic bacteria in cultures of mixed strains. The results are discussed in relation to preparation of mixed-strain legume inoculants and to studies of competition between strains in the field environment.
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