Application of bacteria-plant association in biodegradation of diesel oil pollutants in soil |
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| Authors: | Sijin Lu Yanguo Teng Zongjian Sun Jinsheng Wang |
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| Institution: | (1) Department of Botany and Microbiology, Faculty of Science, University of Lagos, Akoka, Yaba, Lagos, Nigeria;(2) Department of Chemistry, University of Lagos, Lagos, Nigeria |
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| Abstract: | The bacteria and plants were associated to remove diesel oil pollutants from soil. Three efficiently degrading bacteria (named
strains Q10, Q14 and Q18, respectively) were isolated. Two plants (alfalfa and Indian mustard) were selected to form the association.
Biodegradation of diesel oil pollutants in soil was accelerated by bacteria-plants association. The main results are summarized
as follows. The plants-bacteria association was more effective in biodegradation of diesel oil pollutants in soil than in
respective experiments carried out with plants or bacteria alone. Strain Q18-Indian mustard association resulted in the maximum
diesel oil reduction (69.18%). The activities of catalase and polyphenol oxidase in soil were enhanced and microbial populations
in soil, especially in rhizosphere, were also stimulated in the treatment of bacteria-plant association. Overall, the soil
conditions might be improved by alfalfa or Indian mustard to benefit the growth of bacteria, which resulted in degradation
of diesel oil pollutants more effective by the bacteria-plant association. The bacteria-plants association may be a better
approach to the removal of diesel oil pollutants from soil. |
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| Keywords: | bacteria-plant association biodegradation diesel oil pollutant soil |
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