Abstract
The evaluation of antibiotic and chitinolytic activity in actinomycetes isolated from soddy-podzolic soil (Albic Retisol (Loamic)) was carried out in Moscow region (56°07′15″ N, 37°30′54″ E). Isolated strains were classified as Streptomyces avidinii INA 01467 and Micromonospora aurantiaca INA 01468 on the basis of cultural and morphological features and analysis of the 16S rRNA gene. Evaluation of the antibiotic activity of isolated actinomycete cultures showed that the strains exhibit both antibacterial activity against gram-positive bacteria and antifungal activity against the collection strains of fungi Sac. cerevisiae INA 01042, C. albicans ATCC 14053, and F. oxysporum VKPM F-148. The ability to synthesize antifungal compounds increased when growing on a medium with chitin by the Streptomyces avidinii INA 01467 strain, including the phytopathogenic Fusarium oxysporum VKPM F-148 strain. Using the Real-Time PCR (Real-Time-PCR) method, the presence of functional genes shitA, responsible for the synthesis of group A chitinase enzymes, was found in the studied bacterial strains of Streptomyces and Micromonospora. The largest amount of the gene was found in the strain Streptomyces avidinii INA 01467, when growing on chitin, and reaches about 15 × 103 copies per mL. The results demonstrated the presence of chitinase and antibiotic activity in the studied strains, including the activity against phytopathogenic fungi, and this allows using these strains in plant protection technologies and soil bioremediation.
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Funding
The work was carried out within the framework on state assignment of the Faculty of Soil Science, Lomonosov Moscow State University (registration number 122090800042-2) according the Government of Russian Federation Executive Order no. 2515-r on the date of September 2, 2022 with the aim of implementing the most important innovation project of state significance directed at the formation of integrated national system for monitoring the climatically active substances.
Soil sampling was carried out within the framework on state assignment Soil Microbiomes: Genomic Diversity, Functional Activity, Geography, and Biotechnological Potential, project no. 121040800174-6.
Microbiological study was performed with the financial support of Russian Science Foundation (project no. 21-14-00076).
Determination of antibiotic activity was carried out with the financial support of Ministry of Science and Higher Education of the Russian Federation within the framework of Federal Scientific and technical program for Genetic Technologies Development for 2019–2027 (agreement no. 075-15-2021-1345, unique identifier of the project RF193021X0012).
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Teregulova, G.A., Sineva, O.N., Markelova, N.N. et al. Evaluation of Chitinolytic and Antibiotic Activity of Streptomyces avidinii Ina 01467 and Micromonospora aurantiaca INA 01468. Eurasian Soil Sc. 56, 611–618 (2023). https://doi.org/10.1134/S1064229323600094
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DOI: https://doi.org/10.1134/S1064229323600094