Study of microbial diversity in plant-microbe interaction system with oil sludge contamination

International Journal of Phytoremediation
Monika DhoteAsha Juwarkar

Abstract

A 90 days greenhouse experiment was conducted for evaluation of soil microbial diversity in different treatments of rhizospheric and nonrhizospheric oil sludge contaminated soil. Various pot treatments (T1-T5) were as follows: 2% oil sludge contaminated soil was considered as control (T1); augmentation of control with preadapted microbial consortium was T2; addition of Vetiver zizanioide to control was T3; bioaugmentation of control along with V. zizanioide was T4; and bioaugmentation with V. zizanioide and bulking agent was T5. During the study, different microbial populations were determined in all treatments. Additionally, soil microbial diversity using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) of 16S rDNA was carried out. At the end of experimental period, significant increase in microbial number in bioaugmented rhizospheric treatments (T4 and T5) was observed as compared to non-rhizospheric and non-bioaugmented treatments (T2 and T3). The community and sequencing results revealed that combined treatment of plant and microbes resulted in improved microbial species and number. The dominant phyla belonged to γ proteobacteria, β proteobacteria, Chloroflexi, firmicutes, and uncultured bacteria...Continue Reading

References

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Methods Mentioned

BETA
electrophoresis
PCR
bioremediation

Software Mentioned

Molecular Evolutionary Genetics Analysis package ( MEGA )
BLASTN
Quantity one
MEGA
CLUSTALW
BLAST

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