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Extremophilic and extremotolerant actinomycetes in different soil types

  • Soil Biology
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Abstract

Problems on the resistance of soil actinomycetes to various environmental factors (pH, salinity, temperature, and moisture) are discussed. Actinomycetes as a special group of prokaryotes were revealed to have a greater range of tolerance to these factors than was thought earlier. The regularities of the distribution of extremophilic and extremotolerant actinomycetes developing in unusual for mycelial bacteria conditions, their structural-functional characteristics, and their taxonomic composition were determined. The predominance of acidophilic representatives of the Micromonospora genus in acid soils (typical peat, soddy-podzolic, and taiga podzol) and the haloalkaliphilic Streptomyces pluricilirescens and S. prunicolor species in desert saline soils are shown. The specific features of the actinomycete complexes on thermal fields of the weakly developed stratified volcanic soils are described. In these complexes, the thermophilic forms were represented only by species of the Micromonospora genus; and the mesophilic forms, by Microbispora species. In the periodically heated desert soils, among the thermophilic actinomycetes, representatives of rare Actinomadura, Saccharopolyspora and Streptosporangium genera along with Streptomyces species were indicated. The mechanisms of the resistance of the actinomycetes to the extreme environmental conditions are discussed.

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

    G. M. Zenova, N. A. Manucharova & D. G. Zvyagintsev

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Original Russian Text © G.M. Zenova, N.A. Manucharova, D.G. Zvyagintsev, 2011, published in Pochvovedenie, 2011, No. 4, pp. 457–478.

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Zenova, G.M., Manucharova, N.A. & Zvyagintsev, D.G. Extremophilic and extremotolerant actinomycetes in different soil types. Eurasian Soil Sc. 44, 417–436 (2011). https://doi.org/10.1134/S1064229311040132

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