Protatranes, effective growth biostimulants of hydrocarbon-oxidizing bacteria from Lake Baikal, Russia

Abstract

Under natural conditions, biodegradation processes proceed slowly, especially in regions with low temperature. To activate vital processes in hydrocarbon-oxidizing microorganisms at low temperatures, biologically active compounds can be employed as growth stimulants. A low-temperature (10 °C) study has shown that tris-(2 hydroxyethyl) ammonium arylchalcogenylacetates, “protatranes” exert an effect on the growth of hydrocarbon-oxidizing strains of Rhodococcus erythropolis and Pseudomonas fluorescens, isolated from natural oil seepage on Lake Baikal. It has been found that “protatranes”, at microconcentrations, increase the growth rate of R. erythropolis bacteria by 2–16 times. It has been established that compounds slightly effect the growth of P. fluorescens. The positive effect of “protatranes” compounds on the growth rate of hydrocarbon-oxidizing microorganisms at low positive temperatures can be used for the development of environmentally benign methods for the restoration of natural objects after their contamination with oil. Keywords: Protatranes, Stimulants, Hydrocarbon-oxidizing bacteria, Lake Baikal, Arylchalcogenylacetic acids, Tris(2-hydroxyethyl)ammonium salts