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Published on: April 23, 2012
Kinetics of ochratoxin A production in different Aspergillus species
J Varga1, Krisztina Rigó, Csilla Lamper
1Department of Microbiology, Faculty of Sciences, University of Szeged, Hungary. jvarga@bio.u-szeged.hu
Abstract:
Kinetics of ochratoxin A production was examined in a number of ochratoxin producing isolates representing different sections of the Aspergillus 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 x l0(5) ng ml(-1) among the Aspergillus isolates tested. The A. albertensis and A. melleus isolates examined were found to produce ochratoxin A constitutively. A. albertensis produced the highest amounts of ochratoxin A at 30 degrees C after 7 days' incubation in YES liquid medium. Ergosterol content and ochratoxin production of A. albertensis cultures were in good correlation.
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