“…The production of gluconic acid is mainly done in batch cultivation using several species belonging to the following fungal genera, Aspergillus, Penicillium, Fusarium, Mucor and Gliocladium (Lockwood, 1975;Petriuccioli, Piocioni, Fenice, & Federici, 1994;Rosenberg, Svitel, Rosenbergova, & Sturdik, 1992;Singh, Sharma, & Singh, 2001a). Among the different fungal genera, it has been reported that the accumulation of large amounts of the gluconic acid and its salts are restricted to certain species of Aspergillus especially Aspergillus niger which considered as the most industrially important gluconic acid producer in fermentation industry (El-Enshasy, 2003;Roukas, 2000;Sankpal, Joshi, Sutar, & Kulkarni, 1999;Sankpal, Cheema, Jambe, & Julkami, 2001).…”