VEGETOS: An International Journal of Plant ResearchOnline ISSN: 2229-4473
Print ISSN: 0970-4078

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Selection of Culture Media and Optimization of Media Composition for Extracellular Production of Lipase by Acinetobacter sp. AH-19

Selection of Culture Media and Optimization of Media Composition for Extracellular Production of Lipase by Acinetobacter sp. AH-19

A total of 20 strains of bacteria were isolated from cow shade area soil collected in India. The isolated strains were screened using Rhodamine B dye on tributyrin containing nutrient agar petriplates. One isolated strain, exhibiting a broader clear zone than the remaining ones, indicating its higher lipase activity, was selected and identified as Acinetobacter sp. AH-19 based on morphological and biochemical characterization. Out of the four culture media (MI to M-IV) tested, the maximum production (78 U/ml) of lipase was observed in M-IV, that consisted of (% w/v): starch (0.8); peptone (1.0); NH4Cl (0.5); MgSO4 (0.05); CaCl2 (0.06); K2HPO4 (0.09); olive oil (0.2 % v/v) and tween-80 (0.2 % v/v). Optimization of media composition of M-IV for the production of lipase was performed by one factor at a time approach and the maximum production of lipase was observed at (% w/v): starch (0.4) 87 U/ ml , peptone (0.8) 110 U/ml, NH4Cl (1.0) 114.5 U/ml, MgSO4 (0.02) 121 U/ml, CaCl2 (0.1) 129 U/ml, K2HPO4 (0.05) 135 U/ml, Olive oil (0.25 % v/v) 149 U/ml and tween-80 (0.25 % v/v) 158 U/ml. .

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