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Simultaneous DNA-RNA Extraction from Coastal Sediments and Quantification of 16S rRNA Genes and Transcripts by Real-time PCR
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Advanced methods for RNA recovery from petroleum impacted soils
Maria Irianni-Renno1, Tom C Sale1, Susan K De Long1
1Department of Civil and Environmental Engineering, Colorado State University, 1301 Campus Delivery, Fort Collins, CO 80523, USA.
Methodsx
|November 10, 2021
Summary
This study presents a new method for extracting RNA from petroleum-contaminated soils, enabling the study of active microbial communities during site remediation. The improved RNA purification helps understand microbial processes for effective environmental restoration.
Area of Science:
- Environmental Science
- Microbiology
- Biochemistry
Background:
- Microbial hydrocarbon degradation is crucial for petroleum-contaminated site remediation.
- Understanding active microbial communities in subsurface petroleum systems is vital for enhancing degradation technologies.
- RNA analysis offers insights into microbial activity but is hindered by RNA instability and PCR inhibitors in petroleum soils.
Purpose of the Study:
- To develop and validate a method for purifying RNA from petroleum-impacted soils.
- To enable the characterization of active microbial communities in challenging remediation environments.
- To support the advancement of technologies for effective microbial degradation of petroleum contaminants.
Main Methods:
- A modified soil wash pretreatment protocol was combined with a commercial DNA extraction kit.
- The pretreatment solution was reformulated using an RNA preservation solution instead of water.
- The method was validated using cryogenically preserved soils from former petroleum refineries.
Main Results:
- The new soil washing approach effectively removed PCR inhibitors, improving RNA quality.
- RNA recovery was not adversely affected by the modified procedure.
- The method successfully allowed for the characterization of active microbial communities in petroleum-impacted soils.
Conclusions:
- The developed RNA extraction method is a valuable tool for studying microbial metabolic processes in petroleum-contaminated sites.
- This technique facilitates a deeper understanding of dynamic biochemistry during site remediation.
- The findings support the development of natural and engineered remediation strategies for petroleum-impacted environments.
