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Bioactive carotanes from Trichoderma virens.

F A Macías1, R M Varela, A M Simonet

  • 1Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Apdo. 40, 11510-Puerto Real, Cádiz, Spain. famacias@uca.es

Journal of Natural Products
|September 23, 2000
PubMed
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Four new carotane metabolites, trichocaranes A-D, were isolated from Trichoderma virens. These compounds demonstrated significant inhibition of etiolated wheat coleoptile growth, indicating potential phytotoxic activity.

Area of Science:

  • Natural Product Chemistry
  • Plant Physiology
  • Mycology

Background:

  • Trichoderma virens is a fungus known for producing bioactive secondary metabolites.
  • Carotane skeletons represent a class of terpenoids with diverse biological activities.

Purpose of the Study:

  • To isolate and characterize novel metabolites from Trichoderma virens.
  • To investigate the phytotoxic effects of these new compounds on plant growth.

Main Methods:

  • Isolation and purification of metabolites using chromatographic techniques.
  • Structure elucidation employing Nuclear Magnetic Resonance (NMR) and mass spectrometry.
  • Bioassays to assess inhibition of etiolated wheat coleoptile growth.

Main Results:

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  • Four new carotane-type metabolites, designated trichocaranes A (1), B (2), C (3), and D (4), were identified.
  • Compounds 1 and 2 inhibited wheat coleoptile growth by 40% at 10(-4) M.
  • Compound 3 showed a significant inhibition of 86% at 10(-3) M.

Conclusions:

  • Trichoderma virens produces novel carotane metabolites with significant phytotoxic properties.
  • The identified trichocaranes possess potential as plant growth inhibitors.