Enhanced production of lovastatin by Omphalotus olearius (DC.) Singer in solid state fermentation

Background: Although lovastatin production has been reported for different microorganism species, there is limited information about lovastatin production by basidiomycetes. Aims: The optimization of culture parameters that enhances lovastatin production by Omphalotus olearius OBCC 2002 was investigated, using statistically based experimental designs under solid state fermentation. Methods: The Plackett Burman design was used in the first step to test the relative importance of the variables affecting production of lovastatin. Amount and particle size of barley were identified as efficient variables. In the latter step, the interactive effects of selected efficient variables were studied with a full factorial design. Results: A maximum lovastatin yield of 139.47 mg/g substrate was achieved by the fermentation of 5 g of barley, 1-2 mm particle diam., at 28 degrees C. Conclusions: This study showed that O. olearius OBCC 2002 has a high capacity for lovastatin production which could be enhanced by using solid state fermentation with novel and cost-effective substrates, such as barley. (C) 2013 Revista Iberoamericana de Micologia. Published by Elsevier Espana, S.L.U. All rights reserved.