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Published on: April 23, 2012
Antimicrobial effects of clofibrate on the wheat pathogen Fusarium culmorum
Abstract:
The biological effects of clofibrate (ethyl p-chlorophenoxy-isobutyric acid) on the growth and metabolism of the soil-borne wheat pathogen Fusarium culmorum, were examined. In mid log phase (16 hr) cultures both phenylalanine uptake and secondary spore production were stimulated at 0.1 microM concentration; the net sterol content was reduced 50% at 0.35 microM; oxygen uptake was stimulated at 0.1 mM; growth was inhibited 50% at 0.1 mM concentration. Both phenylalanine and oxygen uptake were inhibited at 1.0 mM and pyruvate dehydrogenase activity was reduced 50% at 50 mM concentration of clofibrate. The data indicate that clofibrate affects a number of biological and enzyme systems. The inhibitory effect on the growth of the pathogen suggest a potential use of hypolipidemic agents like clofibrate as an antifungal agent for seed protection.
Insights
Clofibrate, a hypolipidemic agent, impacts Fusarium culmorum growth and metabolism. Its antifungal properties suggest potential for seed protection applications.
Area of Science:
- Agricultural Science
- Mycology
- Biochemistry
Background:
- Fusarium culmorum is a significant soil-borne pathogen affecting wheat crops.
- Understanding the metabolic interactions between soil pathogens and xenobiotics is crucial for developing effective crop protection strategies.
Purpose of the Study:
- To investigate the biological effects of clofibrate on the growth and metabolic processes of Fusarium culmorum.
- To evaluate the potential of clofibrate as an antifungal agent for seed protection.
Main Methods:
- Cultures of Fusarium culmorum were treated with varying concentrations of clofibrate.
- Measurements included phenylalanine uptake, sterol content, oxygen consumption, growth inhibition, and pyruvate dehydrogenase activity.
Main Results:
- Clofibrate at low concentrations (0.1 microM) stimulated phenylalanine uptake and spore production.
- At higher concentrations (0.1 mM), clofibrate inhibited growth by 50% and stimulated oxygen uptake.
- Significant inhibition of phenylalanine and oxygen uptake occurred at 1.0 mM, and pyruvate dehydrogenase activity was reduced at 50 mM.
Conclusions:
- Clofibrate exerts diverse biological and enzymatic effects on Fusarium culmorum.
- The observed growth inhibition suggests clofibrate's potential as an antifungal agent for seed protection, warranting further investigation.
