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Nivalenol production byFusarium poae
1Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, P.B. 7024, S-750 07, Uppsala, Sweden.
Mycotoxin Research
|April 23, 2013
Summary
Swedish Fusarium poae isolates can produce nivalenol, a harmful mycotoxin. Fungicide application in fields significantly reduced nivalenol levels in harvested grain, offering a potential control strategy.
Area of Science:
- Agricultural Science
- Mycology
- Food Safety
Background:
- Fusarium species are significant plant pathogens and producers of mycotoxins.
- Nivalenol is a trichothecene mycotoxin found in contaminated grains, posing risks to human and animal health.
- Understanding the toxigenic potential of Fusarium species in different geographical regions is crucial for food safety.
Purpose of the Study:
- To investigate the mycotoxin production capabilities of Fusarium species isolated from Swedish grain.
- To determine the prevalence of nivalenol and other trichothecene toxins produced by Fusarium poae.
- To evaluate the efficacy of fungicide treatment in reducing mycotoxin contamination in field conditions.
Main Methods:
- Isolation and identification of Fusarium species from Swedish nivalenol-contaminated grain.
- Culturing of Fusarium isolates on rice medium under controlled conditions (temperature, UV-light) to assess toxin production.
- Analysis of mycotoxins (nivalenol, T-2/HT-2 toxin) using appropriate analytical techniques.
- Field experiments involving fungicide application on Fusarium poae-infected plots.
Main Results:
- Six out of ten Fusarium poae isolates from Sweden produced nivalenol, with highest yields observed under specific culture conditions.
- Fusarium poae isolates from other countries primarily produced T-2/HT-2 toxin, not nivalenol.
- One Swedish isolate demonstrated the capability to produce both nivalenol and T-2/HT-2 toxins.
- Fungicide treatment in an experimental field significantly decreased nivalenol concentration in the harvested grain.
Conclusions:
- Fusarium poae is a key nivalenol-producing species in Swedish grain.
- Geographical origin influences the toxigenic profile of Fusarium poae.
- Fungicide application represents a viable strategy for mitigating nivalenol contamination in agricultural settings.
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