Fungistatic effect of bark extracts from Frangula alnus Mill. and Rhamnus cathartica L. on certain xylotrophic representatives of the phylum Basidiomycota

The study examines the fungistatic effect of bark extracts from Frangula alnus Mill. and Rhamnus cathartica L. on representatives of the phylum Basidiomycota – phytopathogens and xylotrophs that cause damage to forest crops and wooden structures. Six fungal strains from the Belarus Collection of Non-pathogenic Microorganisms of the Institute of Microbiology of the NAS of Belarus were investigated in the experiment: Phellinus igniarius (BIM F-205), Phellinus tremulae (BIM F-204), Fomitopsis pinicola (BIM F-225), Phellinus pini (BIM F-321), Gloeophyllum sepiarium (BIM F-227), and Serpula lacry­ mans (BIM F-835). The results showed that the F. alnus extract, containing hydroxyanthraquinone secondary metabolites, signi ficantly suppressed the growth of five out of the six species, with the strongest effect observed for S. lacrymans (57 % inhibition). Further analysis using extracts with varying concentrations of hydroxyanthraquinones revealed a clear dose-dependent response in G. sepiarium, confirming the key role of these compounds in the fungistatic effect. The findings expand the understanding of the role of hydroxyanthraquinones in phytoimmunity and open prospects for their application in forest crop biotechnology.

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