Channelling of glucose by methanol for citric acid production from Aspergillus niger |
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Authors: | Navaratnam P. Arasaratnam V. Balasubramaniam K. |
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Affiliation: | (1) Department of Biochemistry, Faculty of Medicine, University of Jaffna, Kokuvil, Sri Lanka |
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Abstract: | Citric acid produced by Aspergillus niger was increased from 4.6g l-1 to 7.8gl-1 by supplementing basal medium with methanol (30mll-1). While stimulating citric acid production, methanol did not improve membrane permeability of the fungus for citric acid. Methanol inhibited the germination of Aspergillus spores. An increase in glucose concentration from 50gl-1 to 100gl-1 in the presence of methanol (30mll-1) improved citric acid production (1.6-fold) while at higher levels of glucose concentration methanol had no effect on citic acid production. |
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Keywords: | Channelling extracellular and intracellular citric acid fungus stimulating |
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