Cytogenetic effects of Fusarium mycotoxins on root tip cells of rye (Secale cereale L.), wheat (Triticum aestivum L.) and field bean (Vicia faba L. var. minor)
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The effects of fusarial toxins: DAS, T 2, DON, 3 Ac DON, MON and ZEA, on actively dividing root tip cells of rye, wheat and field bean were investigated. Three concentrations: 1, 5 and 10 mg mL-1 were applied for 24 hours. Nuclei and chromosomes were stained using the Feulgens method. It has been found that trichothecene mycotoxins (DAS, T 2, DON, 3 Ac DON) had a profound effect on mitosis, as they decreased the mitotic index, produced excessive condensation of pro and metaphase chromosomes, C metaphases and C anaphases, and caused an accumulation of metaphases. The main effect of trichothecene mycotoxins, probably caused via their influence on protein synthesis, was abnormal functioning of the mitotic spindle.
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D.Packa, Department of Plant Breeding and Seed Production, University of Agriculture and Technology, Pl. Lodzki 3, 10-724 Olsztyn, Poland.