Fig. 1From: Comparison of five bacterial strains producing siderophores with ability to chelate iron under alkaline conditionsVisualization of the morphology of the bacteria studied. Microphotographs illustrative of the bacteria stained with DAPI and observed by fluorescent microscopy (upper images) or by phase-contrast microscopy (lower images). All microphotographs were taken in cultures with cells in exponential phase of growth: 6 h for all strains, except A. vinelandii (48 h)Back to article page