Biopolym. Cell. 2008; 24(3):246-253.
http://dx.doi.org/10.7124/bc.0007A7
Bioorganic Chemistry
Effect of bacterial consortium on oxidative stress in soybean plants in cadmium-contaminated soil
1, 2Zaets I. E., 2Kozyrovska N. O.
  1. Taras Shevchenko National University of Kyiv
    64, Volodymyrska Str., Kyiv, Ukraine, 01033
  2. Institute of Molecular Biology and Genetics, NAS of Ukraine
    150, Akademika Zabolotnoho Str., Kyiv, Ukraine, 03680

Abstract

Different mechanisms of heavy metal resistance operate in soy-bean at different concentrations of cadmium in soil. For instance, at 10 times excess of maximum permissible concentration (MPC) of cadmium the oxidative burst in soybean roots is more prolonged, and mainly glutathion-S-transferase contributes to overcoming the stress. At the same time guaiacolperoxidase and phenols play major role in reducing toxicity of cadmium at 100 excess of MPC, while the contribution of glutathion-S-transferase is deminished. The bacteria of consortium inhibit the activity of peroxidase and in this way elevate H2O2 concentration during oxidative burst which results in strengthening expression of the genes of glutathion-S-transferase and enzymes of phenilpropanoid metabolism and more effective overcoming of the stress by plants.
Keywords: bacterial consortium, Glycine max. L., heavy metals, oxidative stress, glutathion-S-transferase, guaiacol- peroxidase, soluble phenols
Full text: (PDF, in English) (PDF, in Ukrainian)

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