Table 1.

Identifying characteristics of bacterial strains used in this study

StrainProduction of siderophoresaProduction of HCNbUtilization as sole C sourceb
CC13c +++++
CC19c +++
CC148c ++++
CC209c ++++
  • a Data indicate the radii of the discolored halos around bacterial streaks on chromeazurol S agar plates (30), as follows: +, 4 to 5 mm; ++, 6 to 8 mm; −, no halo.

  • b +, positive; −, negative.

  • c A positive reaction for the pyoverdine type of siderophores was obtained with these strains when the test described by de Weger et al. (10) was used.