Screening for Growth Promoting Soil Microorganisms in Northern Kazakhstan

Nauanova A. Zhumadina S. Issayeva A. Kenzhegulova S. Shumenova N. Konkybaeva A. Ospanova S. Baimbetova E. Yerpasheva D.
September 2025 Engineered Science Publisher

ES Food and Agroforestry
2025 #21

Sustainable agriculture requires environmentally friendly strategies to enhance plant growth. Plant growth-promoting microorganisms (PGPM) offer a natural alternative to chemical inputs, but their effectiveness depends on plant–microbe compatibility, soil type, and climatic conditions. This study aimed to isolate and characterize PGPM from six soil types in Northern Kazakhstan and evaluate their effects on cereal crops. A total of 100 bacterial strains were isolated using traditional microbiological techniques, and 30 were selected for molecular identification based on 16S rRNA gene sequencing. The growth-promoting potential of bacterial culture filtrates was tested on wheat, barley, and oat seeds under laboratory conditions. Results showed crop-specific responses to bacterial treatments. In barley, strain 69S significantly enhanced germination energy (by 43%), root length (by 73%), and radicle length (by 65%) compared to the control. In wheat, strain 91 increased root and radicle lengths by 23% and 27%, respectively. In oat, strain 57 improved root length (28%), radicle length (33%), and germinating ability (20%). These findings demonstrate the presence of a rich local gene pool of PGPM with the potential to support sustainable cereal production. Further research will focus on field validation and formulation development for agricultural application.

Cereal crops , Effective microorganisms , Growth stimulation , Plant growth-promoting microorganisms , Soil microorganisms

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Department of Soil Science and Agrochemistry, S.Seifullin Kazakh AgroTechnical Research University, 62 Zhenis Ave, Astana, 010010, Kazakhstan
LLP “BIO-KATU”, 27 Aliya Moldagulova Str, Astana, 010010, Kazakhstan
Department of Biology, Plant Protection and Quarantine, S.Seifullin Kazakh AgroTechnical Research University, 62 Zhenis Ave., Astana, 010010, Kazakhstan
Institute of Ecology and Biology, Shymkent University, 6 Zhibek Zholy Str, Shymkent, 160031, Kazakhstan

Department of Soil Science and Agrochemistry
LLP “BIO-KATU”
Department of Biology
Institute of Ecology and Biology

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