NH4H2PO4 0.03 g Na2HPO4 0.071 g KH2PO4 0.036 g MgSO4 0.03 g Solution of metals 0.1 ml Yeast extract 0.03 g Glucose 0.03 g Distilled water 100 ml Adjust pH to 7. Sterilize at 118°C for 15 min. Solution of metals: EDTA 0.25 g ZnSO4.7H2O 1.1 g FeSO4.7H2O 0.5 g MnSO4.H2O 0.154 g CuSO4.5H2O 0.04 g Co(NO3)2.6H2O 0.025 g Na2B4O7.10H2O 0.018 g Distilled water 100 ml