Abstract
The article presents the results of a study on the enzymatic activity of microorganisms of the genera Microbacterium, Brevundimonas, Pseudomonas, Streptomyces, and Bacillus, isolated from low-grade brown coal from the Kumiskuduk and Kuznetsk coal mines. These mines are located in the Bukhar-Zhyrau district of the Karaganda region, approximately 35 kilometers east of the city of Karaganda.
To study the enzymatic activity, 10 salt-tolerant strains were selected from the strains isolated on a selective medium with varying concentrations of NaCl. Most of the studied strains isolated from brown coal were capable of synthesizing cellulase, catalase, and pectinase. All salt-tolerant strains, except for strain Microbacterium ginsengiterrae №5, showed high cellulase activity on Hutchinson's medium. All studied strains were capable of producing pectinase, which is important for the decomposition of plant residues in the soil. High catalase activity was observed in strains Microbacterium ginsengiterrae №4, Microbacterium ginsengiterrae №5, Brevundimonas vesicularis №11, Brevundimonas nasdae №12, Brevundimonas vesicularis №19, Pseudomonas mandelii №25, Streptomyces parvus №26, Streptomyces parvus №27, and Brevundimonas vesicularis №28. It was found that strains Streptomyces parvus №27 and Brevundimonas vesicularis №28 had moderate catalase activity, while strain Bacillus firmus №2 did not exhibit this enzyme.
The obtained results highlight that all the listed characteristics of salt-tolerant microorganisms make them promising for the creation of microbiological biological products necessary for increasing the productivity of agricultural crops on saline soils. They also have ecological significance in biotechnological processes aimed at the bioremediation of saline soils and the processing of organic residues and coal waste.
01 Introduction
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02 References
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