Dynamics of deoxynivalenol and zearalenone production by Fusarium graminearum under laboratory conditions
2009
Bocarov-Stancic, A.S., Bio-Ecological Center, Zrenjanin (Serbia) | Levic, J.T., Maize Research Institute Zemun Polje, Belgrade - Zemun (Serbia) | Stankovic, S.Z., Maize Research Institute Zemun Polje, Belgrade - Zemun (Serbia) | Stanisic, M.M., Bio-Ecological Center, Zrenjanin (Serbia) | Bilek, S.O., Bio-Ecological Center, Zrenjanin (Serbia)
Toxicological investigations encompassed two cultures of Fusarium graminearum: 1) D2 isolate, originating from air was obtained on Sabouraud medium during a routine control of laboratory sterility conditions at the Department of Microbiology of the Bio-Ecology Center, Zrenjanin (Serbia) during 2006, and 2) GZ-LES control isolate, a well known producer of zearalenone (ZON) and deoxynivalenol (DON), was isolated from maize kernel collected at Leskovac (Serbia) during 1975. The maximum yield of DON was recorded after three weeks of cultivation on maize kernels at 27+/-1 deg C. Contrary to the D2 isolate, which did not show the potential for the DON biosynthesis, the control isolate GZ-LES produced 645.6 ppb of the same type B trichothecene under previously mentioned conditions. The ZON biosynthesis by the isolate D2 (1.2 ppb) was observed after 2 weeks of the stationary cultivation in YES and YES sup(Zn) at room temperature (17-19 deg C). The same isolate produced 0.74 ppb and 17.35 ppb ZON on maize and rice kernels after only 7 and 28 days of cultivation at the room temperature ranging from 17 to 19 deg C and from 15 to 23 deg C, respectively.
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