ІRSTІ 62.09.39, 34.45.05                                                                    №3 (2019г.)

Hasenova A.Kh., Akylova M.A., Sultanova A.Zh., Masirbaeva A.

The article lays out the quantitative and qualitative composition of the microbiocenoses in rhizosphere of the medicinal plant fever-weed (Eryngium).
78 actinomycete isolates were isolated in pure culture, their antagonistic properties against laboratory strains of Bacillus subtilis ATCC 6633 and Comamonas terrigena ATCC 8461 were examined. Actinomycete isolates that showed high activity against laboratory test microorganisms were tested for activity against clinical test cultures that are susceptible to antibiotics used in clinic practice. 85.7% of isolates exhibited activity against gram-positive bacteria. Less than half of the tested isolates (42.9%) revealed antagonism against gram-negative bacteria. Two isolates, C52 and C32, were highly active against both gram-positive and gramnegative bacteria.
Keywords: rhizosphere, gram-positive bacteria, gram-negative bacteria, actinomycetes, antagonistic properties