Nicotine dehydrogenase have attracted considerable research interest in recent years because its potential application in the tobacco industry.In the paper, Nicotine dehydrogenase producing strains were isolated from soil by screening with nicotine as the sole carbon source, and among them a high nicotine degradation strain was selected by experiments in shake flasks. By the experimental results of the morphological, physiological and structural characteristics of bacterium strain and by the comparison of i...