Cyclonerol derivatives from Trichoderma longibrachiatum YM311505

Area of Science:

• Natural Product Chemistry
• Mycology
• Pharmacology

Background:

• Endophytic fungi like Trichoderma longibrachiatum, isolated from Azadirachta indica, are a source of bioactive natural products.
• Azadirachta indica (Neem) is known for its medicinal properties, and its associated endophytes may produce novel compounds.

Purpose of the Study:

• To isolate and characterize secondary metabolites from Trichoderma longibrachiatum YM311505.
• To evaluate the antifungal potential of isolated compounds against key fungal pathogens.

Main Methods:

• Extraction and isolation of fungal metabolites using chromatographic techniques.
• Structure elucidation of isolated compounds via comprehensive spectral analysis (NMR, MS).
• Antifungal activity screening using microdilution assays against Pyricularia oryzae and Candida albicans.

Main Results:

• Isolation of a new sesquiterpene, 10,11-dihydrocyclonerotriol (1).
• Isolation of two known compounds: catenioblin C (2) and sohirnone A (3).
• Compounds 1-3 exhibited notable antifungal activity against Pyricularia oryzae and Candida albicans.

Conclusions:

• Trichoderma longibrachiatum YM311505 produces a novel sesquiterpene with antifungal properties.
• The isolated compounds represent potential leads for developing new antifungal agents.
• This study highlights the potential of endophytic fungi from medicinal plants as sources of bioactive molecules.