@entity17367 . betavasculorum strains produced a bactericidal antibiotic in vitro that inhibited a wide spectrum of gram-negative and gram-positive bacteria. The optimum temperature for production was 24 degrees C, and the addition of @entity653 to culture media enhanced antibiotic production. Antibiotic production by these strains in the infection court of @entity415 was the principal determinant enabling it to gain ascendancy over competing antibiotic-sensitive @entity17367 . @entity6475 . There was a complete correlation between antibiotic production by @entity17367 . betavasculorum in vitro and inhibition of competing @entity17367 . @entity6475 in planta. Inhibition of the latter by the former was apparent after 10 h of incubation in @entity415 tuber wounds. Population densities of sensitive @entity17367 . @entity6475 in mixed @entity415 @entity281 with @entity17367 . betavasculorum were approximately 10-fold lower after 48 h of incubation than in corresponding single sensitive strain infections. @entity17367 . carotovora were not inhibited in @entity281 that were incubated anaerobically. This correlated with the absence of antibiotic production during anaerobic incubation in vitro. Antibiotic-resistant strains of @entity17367 . carotovora were not inhibited in planta or in vitro by @entity17367 . betavasculorum. Moreover, isogenic antibiotic-negative (Ant) mutant @entity17367 . betavasculorum strains were not inhibitory to sensitive @entity17367 . @entity6475 in @entity281 .

Role of antibiosis in competition of erwinia strains in XXXX infection courts.

@entity17367 :: ('554', 'Species') :: ['Erwinia carotovora subsp', 'E. carotovora subsp'] @entity653 :: ('MESH:D005990', 'Chemical') :: ['glycerol'] @entity415 :: ('4113', 'Species') :: ['potato'] @entity281 :: ('MESH:D007239', 'Disease') :: ['tuber infections'] @entity6475 :: ('MESH:D013180', 'Disease') :: ['carotovora strains']
@entity415 :: (4113,Species) :: ['potato']
