Production of Extrcellular Polyscchride by local Isolated Serratia maressence

Serratia marcescens . . (2.79 / ) 7 . (2.83 /) . . NO3 (2.90 /).In this study Serratia maressence was isolated and diagnosed from the soil of Bashiqa sub district in Ninevah Province, as well as studying the effect of different transplanting conditions to promote the Governorate of Extracellular polyscchride like using various carbonic sources, different types of nitrogen sources and various periods of incubation. The highest productivity of polyscchride (2.79 gr.Lt.) has been obtained after seven days of incubation. The highest productivity (2.83 gr.Lt.) has been obtained when the glucose was used as a carbonic source and the lowest productivity has been obtained when the lactose was used as a carbonic source. Sodium Nitrate- as a nitrogen source has yielded the highest productivity (2.90) of polyscchride.