UDC
579.64

SOIL MICROBIAL COMMUNITIES AS A SOURCE OF STRAINS FOR THE BIOLOGICAL PROTECTION OF SOYBEANS AGAINST FUSARIUM IN THE YENISEI SIBERIA

Published in Bulletin of Nizhnevartovsk State University · Pages 4–11 · Rubric: Articles
DOI: https://doi.org/10.36906/2311-4444/20-2/01
Received: 06.06.2020 Accepted: 15.06.2020 Published: 25.06.2020 Language of publication: RUS
Eighteen strains of bacterial antagonists inhibiting growth of Fusarium pathogens of soybean were isolated from soil microbial communities of the Yenisei Siberia. The two most active antagonists (RSA-1 strain, preliminary identified as Bacillus sp., and RSA-13 strain, preliminary identified as Streptomyces sp.) were tested as biological agents to protect soybeans from Fusarium infections in vitro . In the absence of artificial infection, the RSA-1 strain reduced the Fusarium incidence by 25 percentage points (from 61.5% to 36.5%, the statistical significance of the effect was p <0.001), and the RSA-13 strain reduced the Fusarium incidence by 32 percentage points (to 29.5%, the statistical significance of the effect p <0.001). Artificial infection of soybean with Fusarium increased the disease incidence up to 83.5% and reduced the length of seedlings by 1.9 times. In case of artificial infection with Fusarium , the RSA-1 strain statistically significantly (p <0.001) reduced the incidence of the disease by 29 percentage points and statistically significantly (p <0.001) reduced the inhibitory effect of the infection on seedling growth. Strain RSA-13 did not affect the incidence of the disease, however, statistically significantly (p <0.001) reduced the inhibitory effect of infection on the growth of seedlings.
soya, fuzarioz, Prieniseyskaya Sibir', biologicheskaya zaschita