Abstract
The effect of some metabolic inhibitors on citric acid production by Aspergillus niger in cane molasses medium was investigated. Addition of 0.01-0.1 iodoacetic acid and sodium arsenate, 0.05 -1.0 sodium malonate, 0.01 sodium azide , 0.01-0.05 sodium fluoride , 0.1-1.0 EDTA stimulated citric acid production (5-49%), but not necessary total titratable acids. Higher concentrations 10mM of iodoacetic acid , sodium malonate and 0.5 mM sodium azide caused a complete inhibition of fungal growth. 0.2 mM of iodoacetic acid, sodium arsenate and sodium fluoride caused a remarkable inhibition of citric acid production. The implications of those preliminary functions was discussed.
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