Ratio [13C]/[12C] as an index for express estimation of hydrocarbon-oxidizing potential of microbiota in soil polluted with crude oil |
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| Authors: | A M Zyakun A M Boronin V V Kochetkov B P Baskunov K S Laurinavichus V N Zakharchenko V P Peshenko T O Anokhina T V Siunova |
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| Institution: | 1. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
2. Pushchino State University, Pushchino, Moscow Region, 142290, Russia
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| Abstract: | The hydrocarbon-oxidizing potential of soil microbiota and hydrocarbon-oxidizing microorganisms introduced into soil was studied
based on the quantitative and isotopic characteristics of carbon in products formed in microbial degradation of oil hydrocarbons.
Comparison of CO2 production rates in native soil and that polluted with crude oil showed the intensity of microbial mineralization of soil
organic matter (SOM) in the presence of oil hydrocarbons to be higher as compared with non-polluted soil, that is, revealed
a priming effect of oil. The amount of carbon of newly synthesized organic products (cell biomass and exometabolites) due
to consumed petroleum was shown to significantly exceed that of SOM consumed for production of CO2. The result of microbial processes in oil-polluted soil was found to be a potent release of carbon dioxide to the atmosphere. |
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