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Contemporary Problems of Ecology

2009 year, number 3

Distribution of Bacillus thuringiensis in the Complex of Spore-Forming Bacteria of Genus Bacillus in the Soil of Nut-Fruit Woods in Southern Kyrgyzstan

V. P. Khodyrev, Z. A. Teshebaeva, B. A. Toktoraliev, V. V. Glupov
Keywords: spore-forming bacteria, Bacillus thuringiensis, soil, nut-fruit woods, Kyrgyzstan
Pages: 329-335

Abstract

Three-year-long investigation of the microflora in the soil of nut-fruit woods in the south of Kyrgyzstan showed a wide distribution of spore-forming bacteria B. subtilis, B. cereus, B. idosus, B. megaterium. In the complex of these bacteria, spore-forming bacteria B. thuringiensis are widespread. The occurrence of spore-forming bacteria B. thuringiensis in mountainous forest black-brown soils reached 80 % of soil samples. Dominating subspecies were tohokuensis (H17), israelensis (H14), toguchini (H31). Abundance of B. thuringiensis was insignificant and accounted for only 4 % of spore-forming bacteria. The abundance B. thuringiensis in oozy biocenoses on the banks of water bodies at the territory of Sary-Chelek reserve reached 12.6-18.0 % of soil spore-forming bacteria. In this connection, it is possible to assume that B. thuringiensis not only are conserved in soils but also can reproduce.