Journal of Biotechnology & Biomaterials
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An extremely relevant phytoremediation trend is degradation of hydrocarbon pollutants in soil (petroleumand refining
products). Perrennial legume grasses
Lam. and alfalfa (
Medicago sativa L.
) were used as phytoremediants
restoring biological activity of soil affected by petroleumor its fractions. Plant productivity is grounded on symbiosis with
. The latter is able to consume oil as the sole carbon source.
Petroleumcontent in liquid mineral medium (0.5 and 1 %, v/v) fell in 3 months under the impact of nodulating bacteria by
97.4% and 97.8%, respectively. Successful 5-month performance of plant-microbial association
Lam. in trials with 0.5% oil concentration reduced its soil level by 86%, whereas in variants with 1% oil concentration the
pollutant load dropped by 61%.Presowing treatment of alfalfa seeds with microorganisms promoted 1% oil decomposition in
sod-podzol soil during cultivation of the legume crop.Inoculation of alfalfa seeds with nodulating bacteria
oil degradation by 13.8% as compared to the control. Seed exposure to phosphate-mobilizing bacteria
increased oil detoxification rate in soil by 28.4 %. Maximum efficiency of oil disposal was recorded upon application of plant-
S. meliloti + S.plymuthica + Medicagosativawhen
58.47% acceleration of the process was achieved.
Z Aleschenkova is the Head, laboratory of soil microorganisms, plants interactions, Institute of Microbiology, Belarus National Academy of Sciences. She completed
her PhD degree in Microbiology. Her Scientific interests: Soil microorganisms-plants interactions, phytoremediation of contaminated soil, development of microbial
preparations stimulating growth of cultivars and decomposition of xenobiotics.She is the author of 250 publications and 18 patents. During the last 5 years she
coordinated development of 5 biotechnological products promoting plant growth and contributing to environmental protection.
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