Metabolic behaviour of aflatoxin producing strain and non-toxigenic strain of Aspergillus flavus to different sources of nitrogen and glucose concentration |
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Authors: | G S Thapar |
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Institution: | (1) National Institute of Nutrition, Indian Council of Medical Research, 500 007 Hyderabad, India;(2) Present address: IDPL Research Centre, 500 037 PO Balanagar, Township, Hyderabad, India |
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Abstract: | The effect of different nitrogen sources and varying glucose concentration on aflatoxin production by a toxigenic and non-toxigenic strain of Aspergillus flavus was studied. Greatest production (3.8 ppm) of aflatoxin B1 was produced in a synthetic medium when casamino acids were supplied as the nitrogen source. Optimum sugar concentration for aflatoxin B1 production ranged between 3 and 10 g/100 ml. There was no appreciable difference in the metabolic behaviour between toxigenic and non-toxigenic strains of A. flavus when dry mycelial weight, total proteins, non-protein nitrogen and reducing sugar were the criteria. |
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Keywords: | Aspergillus flavus non-toxigenic (NT) toxigenic (T) non-protein nitrogen (NPN) endogeneous respiration reducing sugars aflatoxin |
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