Conclusions
To the best of our knowledge , majority of the experiment on the red pigment production by M. purpureus have been carried out using one factor at a time methodology under solid state fermentation. Only few reports are available on the statistical optimization of red pigment production using submerged culture of M. purpureus. Present study has allowed rapid screening of a number of nutrients in fluencing red pigment production. Interestingly tryptone as nitrogen source has been found to support good pigment production where majority of the investigators have reported monosodium glutamate as effective for the same. The pigment yield and the production were found to be significantly in fluenced by initial pH of medium, glucose and tryptone concentration. The data obtained after optimization has resulted in 14.50 OD U/ml red pigment production.