Effect of carbon source on the antagonistic potential of Streptomyces rimosus B1204

Posted on 21.10.2026 by secretar
UDC 579.264:631.589.2:635.63:632.937
https://doi.org/10.25630/PAV.2026.95.42.001

Burkova E.V., Pavlenko E.O., Shagaev A.A., Lapina V.V., Markvichev N.S.

Mineral wool substrates, which are predominant in greenhouse vegetable production, lack a well-established microbial community at the start of the crop rotation, creating the conditions for colonization of the substrate by phytopathogenic microorganisms and the development of fungal diseases. A promising approach to biological plant protection is the use of actinomycetes of the genus Streptomyces, which exhibit a broad spectrum of antagonistic activity. This study examined the Streptomyces rimosus B1204 strain — the active agent of the biological product Veriver, Zh. Its fungicidal activity against seven test cultures of phytopathogenic fungi (Cylindrocarpon sp., Alternaria sp., Verticillium sp., Colletotrichum sp., Botrytis sp., Cladosporium sp., and Fusarium oxysporum F2200) was assessed on a rich Czapek Dox Agar medium and a medium simulating cucumber root exudate. A wide spectrum of antagonistic activity of the strain was established (inhibition coefficients from 40 to 77% on Czapek Dox Agar medium and from 12 to 43% on a medium simulating root exudates), with the exception of Verticillium sp., for which the inhibitory effect was absent on a medium simulating root exudate. It was shown that the source of organic matter affects the severity of the fungicidal action of the studied strain in relation to F. oxysporum F2200. Addition of starch to the medium simulating root exudates increased the inhibition coefficient of F. oxysporum F2200 from 20% to 59%, and on Hoagland agar mineral medium with starch - up to 74%. Both cultures (S. rimosus B1204 and F. oxysporum F2200) exhibited amylolytic activity. The obtained results may indicate a dependence of the effectiveness of biocontrol on the composition of the organic pool of the rhizosphere and can be used in the development of regulations for the use of the S. rimosus B1204 strain in biological plant protection systems in protected soil conditions.

Key words: Streptomyces rimosus, mineral wool substrate, cucumber, protected ground, phytopathogens, fungicidal activity

Burkova E.V., leading agronomist for plant protection at the Smolensky Trading Company. Tel.: +7 (933) 933-18-77. E-mail: e.burkova@gorkunov.com Pavlenko E.O., laboratory assistant at the Department of Biotechnology, D.I. Mendeleev Russian Chemical Technical University. Tel.: +7 (977) 710-90-49. E-mail: yekaterina_pavlenko_2002@mail.ru Shagaev A.A., Cand. Sci. (Agr.), assistant at the Department of Biotechnology at D.I. Mendeleev Russian Chemical Technical University. Tel.: +7 (968) 792-60-77. E-mail: shagaev.a.a@muctr.ru Lapina V.V., DSci. (Agr.), agronomist consultant at the BIOM Group of Companies. Tel.: +7 (915) 487-26-30. E-mail: biomtorglv@mail.ru Markvichev N.S., Cand. Sci. (Techn.), associate professor, associate professor at the Department of Biotechnology at D.I. Mendeleev Russian University of Chemical Technology, Deputy General Director of the BIOM Group of Companies, +7 (916) 679-85-36. E-mail: markvichev.n.s@muctr.ru; yekaterina_pavlenko_2002@mail.ru
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For citing: Effect of carbon source on the antagonistic potential of Streptomyces rimosus B1204. E.V. Burkova, E.O. Pavlenko, A.A. Shagaev, V.V. Lapina, N.S. Markvichev. Potato and vegetables. 2026. No6. Pp. 22-28. https://doi.org/10.25630/PAV.2026.95.42.001 (In Russ.).

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