Abstract
Pigment-producing strains IB-ST-GO, IB-ST-RHF, IB-ST-GOLI isolated from the Shulgan-Tash speleosystem catchment were assigned to the Janthinobacterium lividum clade with a similarity level of 99.7-99.8% using the 16S rRNA gene sequence analysis method. The bacterial influence on the development of phytopathogenic fungi Fusarium oxysporum and Rhizoctonia solani by contact and non-contact methods was evaluated. Among the studied bacteria, the strain IB-ST-GO showed antifungal activity, manifested in inhibition of the development of the aerial mycelium of fungi (by 38% for F. oxysporum, 55% for R. solani) due to the formation of volatile metabolites.
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