ENVIRONMENTAL STRESS RESISTANCES OF ROOT-NODULE BACTERIA FROM MEDICAGO FALCATE L.

Authors

  • Zultsetseg Ch Laboratory of Microbial synthesis, Institute of General and Experimental Biology, Mongolian Academy of Sciences
  • Selitskaya O V Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
  • Gerelmaa Z Laboratory of Microbial synthesis, Institute of General and Experimental Biology, Mongolian Academy of Sciences
  • Rentsenkhand Ts Laboratory of Microbial synthesis, Institute of General and Experimental Biology, Mongolian Academy of Sciences

DOI:

https://doi.org/10.5564/pmas.v58i2.1005

Keywords:

Medicago falcate L, root nodule bacteria, environmental stress,

Abstract

The symbiotic system of Legumes and root-nodule bacteria is a significant process for enriching barren and dry soils and supporting plant growth. The aim of this study was to isolate root-nodule bacteria from Medicago falcate and to select high activity strains with resistance to environmental stress.
As a result, only MSZ-25 strain grew in the medium containing 0.8M NaCl, with pH4.8-9.8 and at temperatures of 4-45°С. All rhizobial isolates were tolerant to the concentrations of 0.01-0.1% Pb(NO3)2, 0.01% ZnSO4, CdCI2, CuCI2 and NiCI2. The strains were also resisted to penicillin 10μ/ml, erythromycin 10μ/ml, and chlorampenicol 10μ/ml but the growths of all isolates were inhibited by kanamycin 30μ/ml, novobiocin 30μ/ml and tetracycline 10μ/ml.

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Published

2018-09-07

How to Cite

Ch, Z., V, S. O., Z, G., & Ts, R. (2018). ENVIRONMENTAL STRESS RESISTANCES OF ROOT-NODULE BACTERIA FROM MEDICAGO FALCATE L. Proceedings of the Mongolian Academy of Sciences, 58(2), 60–67. https://doi.org/10.5564/pmas.v58i2.1005

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