The synthesis of exogenous phytohormones by soil microorganisms-destructors of organochlorine contaminants

  • Н. А. Ямборко
  • Н. О. Леонова


Aim. It has been studied the qualitative and quantitative compositions of the exogenous phytohormones synthesized by soil microorganisms-destructors of organochlorine pollutants hexachlorocyclohexane and hexachlorobenzene: Pseudomonas putida IMV B-7289, Bacillus megaterium IMV B-7287, Stenotrophomonas maltophilia IMV B-7288 and Pseudomonas putida 9. Results. P. putida 9 is an active strain-producer of exogenous auxins and cytokinins readily available for plant: the maximum content of Zeatin and Zeatinrhibozid exceeded their synthesis by another testing strain in 8.3–15.4 times. P. putida 9 is interesting as a component of a complex microbial preparation for the remediation of areas contaminated by organochlorine pesticides. Conclusions.The strain may be used in combination with effective destructors B. megaterium B-7287, and P. putida IMV B-7289, which showed lower ability to synthesize phytohormones investigated. The spectrum of the synthesized extracellular microbial phytohormones is strain characteristic. It has been shown that the total production of exogenous cytokinins.

Keywords: exogenous microbial phytohormones, pollutant remediation.