Improved Yield of High Molecular Weight DNA Coincides with Increased Microbial Diversity Access from Iron Oxide Cemented Sub-Surface Clay Environments
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Div.
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Microbiology
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Div.
Despite more than three decades of progress, efficient nucleic acid extraction from microbial communities has remained difficult, particularly from clay environments. Lysis with concentrated guanidine followed by concentrated sodium phosphate extraction supported DNA and RNA recovery from high iron, low humus content clay. Alterating the extraction pH or using other ionic solutions (Na2SO4 and NH4H2PO4) yielded no detectable nucleic acid. DNA recovered using a lysis solution with 500 mM phosphate buffer (PB) followed by a 1 M PB wash was 15.22±2.33 g DNA/g clay, with most DNA consisting of >20 Kb fragments, compared to 2.46±0.25 g DNA/g clay with the Powerlyzer soil DNA system (MoBio). Increasing [PB] in the lysis reagent coincided with increasing DNA fragment length. Rarefaction plots based on16S rRNA (V1/V3 region) pyrosequencing libraries from A-horizon and clay soils showed an ~80% and ~400% larger accessed diversity compared to a previous grinding protocol or the Powerlyzer soil DNA system, respectively. The observed diversity from the Firmicutes showed the strongest increase with >3-fold more bacterial species recovered using this system. Additionally, some OTU's having more than 100 sequences in these libraries were absent in samples extracted using the PowerLyzer reagents or the previous lysis method.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1207041
- Journal Information:
- PLoS ONE, Journal Name: PLoS ONE Journal Issue: 7 Vol. 9; ISSN 1932-6203
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Size Matters: Assessing Optimum Soil Sample Size for Fungal and Bacterial Community Structure Analyses Using High Throughput Sequencing of rRNA Gene Amplicons
Inter-laboratory testing of the effect of DNA blocking reagent G2 on DNA extraction from low-biomass clay samples [Inter-laboratory testing of the effect of DNA blocking reagent G2 on DNA extraction from low-biomass clay subsoil]
Chitinase genes revealed and compared in bacterial isolates, DNA extracts and a metagenomic library from a phytopathogen suppressive soil
Journal Article
·
Wed Jun 01 20:00:00 EDT 2016
· Frontiers in Microbiology
·
OSTI ID:1280873
Inter-laboratory testing of the effect of DNA blocking reagent G2 on DNA extraction from low-biomass clay samples [Inter-laboratory testing of the effect of DNA blocking reagent G2 on DNA extraction from low-biomass clay subsoil]
Journal Article
·
Sun Apr 08 20:00:00 EDT 2018
· Scientific Reports
·
OSTI ID:1474353
Chitinase genes revealed and compared in bacterial isolates, DNA extracts and a metagenomic library from a phytopathogen suppressive soil
Journal Article
·
Tue Sep 01 00:00:00 EDT 2009
· FEMS Microbiology Ecology
·
OSTI ID:974312