Thermotolerant and Thermophilic Actinomycetes from Soils of Mongolia Desert Steppe Zoneстатья
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Дата последнего поиска статьи во внешних источниках: 13 февраля 2018 г.
Аннотация:In the actinomycete complexes of Mongolian desert soils, thermotolerant and thermophilic actino-
mycetes were found in high abundance, exceeding that of the mesophilic forms. Among the thermotolerant
members of the order Actinomycetales, Streptomyces, Micromonospora, Actinomadura, and Streptospo-
rangium species were most widespread in desert soils. Experiments with soil microcosms demonstrated that
thermophilic actinomycetes in desert soils grew, developed, and formed mycelia of the length comparable to
that of the mesophilic forms of actinomycetes. Molecular biological investigation of the samples of desert
steppe soils by denaturing gradient gel electrophoresis (DGGE) and fluorescent in situ hybridization (FISH)
revealed members of the phylum Actinobacteria. FISH analysis revealed that the biomass of the metabolically
active mycelial actinobacteria in the prokaryotic community of Mongolian desert soils exceeded that of the uni-
cellular Actinobacteria.
Keywords: thermotolerant and thermophilic actinomycetes, metabolically active mycelial actinobacteria, acti-
nomycete complexes, desert soils.