One of the following acids is not produced by Aspergillus niger

Key Points

• Aspergillus niger is a fungus commonly called black mold.
• It is a filamentous fungus that is naturally found on left over fruits and vegetables.
• It is also widely used for industries for the production of various enzymes and other compounds.
• It is an important source of industrial citric acid.
• Gluconic acid and oxalic acid can also be produced by A. niger on selective medium.
• These organic acids are produced by submerged fermentation using different carbohydrate sources like molasses.
• Citric acid is widely used in food industry for its pleasant taste and its high solubility.

Additional Information

• Some other industrial organic acids and their sources:
  • Acetic acid - Acetobacter aceti
  • Butyric acid - Clostridium butyricum
  • Lactic acid - Lactobacillus