Abstract
The taxonomic and functional structure of actinomycete complexes in the litters and upper horizons of the soils under an artificial coniferous–broad-leaved forest located around the town of Chanchun (Tszilin province, PRС). The complex of actinomycetes included representatives of the Streptomyces, Micromonospora, Streptosporangium, and Streptoverticillium genera and oligosporous forms. In the actinomycete complexes, streptomycetes prevailed in the abundance (61–95%) and frequency of occurrence (100%). In the parcels of Korean pine (Pinus koraiensis) and Mongolian oak (Quercus mongolica), streptomycetes of 19 species from 8 series and 4 sections were isolated. The most representative, as in European forest biomes, was the Cinereus Achromogenes series. A distinguishing feature of the streptomycete complex in the biomes studied was the high participation of species from the Imperfectus series. The verification of the functional activity of natural isolates made it possible to reveal strains with high antagonistic and cellulolytic abilities. A high similarity of actinomycete complexes was found in Eurasian forest ecosystems remote from each other, probably due to the similarity of plant polymers decomposable by actinomycetes.
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