Kinetics of ochratoxin A production in different Aspergillus species |
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Authors: | Varga J Rigó Krisztina Lamper Csilla Téren J Szabó G |
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Institution: | Department of Microbiology, Faculty of Sciences, University of Szeged, Hungary. jvarga@bio.u-szeged.hu |
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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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