Extremophilic and extremotolerant actinomycetes in different soil typesстатья
Информация о цитировании статьи получена из
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Дата последнего поиска статьи во внешних источниках: 13 февраля 2018 г.
Аннотация: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 strat-
ified 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 resis-
tance of the actinomycetes to the extreme environmental conditions are discussed.