Abstract—
From a technogenic soda sludge storage, 58 cultures of alkalitolerant bacteria with amylase, lipase, protease, and cellulase activities were isolated and identified using a medium with selective substrates in the absence of extreme conditions (pH 8) and a rich medium with pH 11 without selective substrates. The effect of pH and NaCl concentration on the growth and hydrolytic activity of Pseudomonas peli, Paenarthrobacter nitroquajacolicus, and Microbacterium kitamiense with lipase and amylase activities was studied. Amylases of the cultures isolated on media with pH 11 and 8 were shown to exhibit the highest activity at pH 10 and 6, respectively, while the specific activity of extracellular lipase of P. peli isolated at pH 8 reached its maximum at pH 11. On the medium with pH 11, Bacillus aequororis, Brevibacterium pityocampae, Microbacterium kitamiense, Microcella putealis, Oerskovia paurometabola, O. enterophila, and O. jenensis with alkaline amylase activity were isolated.
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This study was supported by the Russian Foundation for Basic Research, project no. 19-34-90103.
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Translated by A. Panyushkina
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Shilova, A.V., Maksimov, A.Y. & Maksimova, Y.G. Isolation and Identification of Alkalitolerant Bacteria with Hydrolytic Activity from a Soda Sludge Storage. Microbiology 90, 166–175 (2021). https://doi.org/10.1134/S0026261721020120
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DOI: https://doi.org/10.1134/S0026261721020120