Iron is the necessary micronutrient for cellular metabolism used by almost all bacteria. It has been found that iron has effect not only on the growth , but also on the pathogenicity of the pathogens. It regulates expression of pathogenic genes. In this paper, the result showed that iron is relative to the growth and pathogencity of the pathogen Erwinia carotovora var. carotovora and Erwinia carotovora subsp. atroseptica. And then the related genes to iron metabolism are found and analyzed by bioinformatics...