Kinetics of ochratoxin a production in different <i>Aspergillus</i> species
2002
Varga, J. | Rigó, Krisztina | Lamper, Csilla | Téren, J. | Szabó, G.
Kinetics of ochratoxin A production was examined in a number of ochratoxin producing isolates representing different sections of the <i>Aspergillus</i> genus. Both weak and high ochratoxin producers were tested using immunochemical or high-performance liquid chromatograhic methods. All isolates were found to produce the highest amounts of ochratoxin A after 7-10 days of incubation. Ochratoxin production varied between 30 - 5×10<sup>5</sup> ng ml<sup>-1</sup> among the <i>Aspergillus</i> isolates tested. The <i>A. albertensis</i> and <i>A. melleus</i> isolates examined were found to produce ochratoxin A constitutively<i>. A. albertensis</i> produced the highest amounts of ochratoxin A at 30 °C after 7 days' incubation in YES liquid medium. Ergosterol content and ochratoxin production of <i>A. albertensis</i> cultures were in good correlation.
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