Biologically Active Volatile Organic Compounds (VOCs) Produced by Rhizospheric Actinobacteria Strains Inhibit the Growth of the Phytopathogen Colletotrichum musae

The antifungal potential of volatile organic compounds (VOCs) produced by actinobacterial strains Streptomyces sp. (ACTB-77) and Amycolatopsis (ACTB-290) from the rhizosphere Caatinga plants against Colletotrichum musae was investigated. VOCs these microorganisms (axenic co-culture) were investigated using headspace-solid phase microextraction (HS-SPME) gas chromatography-mass spectrometry (GC-MS). Although no exclusive VOC peaks observed in co-culture with ACTB-77, same experiment involving ACTB-290 yielded five new peaks, including two identified alcohols, suggested as bioreductive products corresponding ketones fungus. Statistical analysis revealed that ACTB-77/C. has a closer similarity to fungus than actinobacteria, while co‑culture ACTB-290/C. showed actinobacteria. These confirmed more pronounced activity strain, growth inhibition experiments. associated its sulfur-containing metabolites, linalool responsible for ACTB-77 activity.