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Moderately haloalkaliphilic actinomycetes in salt-affected soils

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Abstract

It was found that the population density of actinomycetes in solonchaks and saline desert soils varied from hundreds to tens of thousands of colony-forming units (CFUs) per 1 g of soil depending on soil type and was by 1–3 orders of magnitude lower than the number of mycelial bacteria in main soil types. Actinomycetes grow actively in saline soils, and the length of their mycelium reaches 140 m per 1 g of soil. Domination of moderately halophilic, alkaliphilic, and haloalkaliphilic actinomycetes, which grow well under 5% NaCl and pH 8–9, is a specific feature of actinomycetal complexes in saline soils. Representatives of Streptomyces and Micromonospora genera were found among the haloalkaliphilic actinomycetes. Micromonospores demonstrated lower (than streptomycetes) adaptability to high salt concentrations. Investigation of the phylogenetic position of isolated dominant haloalkaliphilic strains of streptomycetes performed on the basis of sequencing of the gene 16S rRNA enabled identifying these strains as Streptomyces pluricolorescens and S. prunicolor.

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Authors and Affiliations

  1. Faculty of Soil Science, Moscow State University, Moscow, 119991, Russia

    D. G. Zvyagintsev, G. M. Zenova & G. V. Oborotov

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  1. D. G. Zvyagintsev
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  2. G. M. Zenova
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  3. G. V. Oborotov
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Zvyagintsev, D.G., Zenova, G.M. & Oborotov, G.V. Moderately haloalkaliphilic actinomycetes in salt-affected soils. Eurasian Soil Sc. 42, 1515–1520 (2009). https://doi.org/10.1134/S1064229309130122

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  • DOI: https://doi.org/10.1134/S1064229309130122

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