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Issue No:8 Vol.4

August-2011

ISSN: 0974-5645

RESEARCH ARTICLES

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15. *Antimicrobial protein production by Bacillus amyloliquefaciens* MBL27: Optimization of culture conditions using Taguchi’s experimental design.** K. Vijayalakshmi, A. Premalatha and G. Suseela Rajakumar.Indian J.Sci.Technol. Vol.4, Issue 8, pp: 931-937.
Abstract We report the applicability of the Taguchi DOE methodology for optimization of culture conditions for maximum antimicrobial protein (AMP) production by Bacillus amyloliquefaciens MBL27. The influence of individual factors and the relationships between the factors and their levels were established. Three factors viz, pH, incubation temperature and incubation period, each at three levels were selected and an orthogonal array (OA) layout of L27 containing 27 well-defined experiments were performed. Two response variables (bacterial growth and inhibitory activity of the AMP) were measured. Maximum AMP production of 6774.85 AU/ml against S. aureus was predicted at pH 7.0, incubation period 36 h and at temperature 300C using response surface plots. This study serves as another example for the application of the Taguchi methodology for improvement of biological processes. Keywords: Antimicrobial protein, antibiotic production, B. amyloliquefaciens, Taguchi design.