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Indirect DNA extraction method suitable for acidic soil with high clay content
Novia Univ Appl Sci, Finland.
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID iD: 0000-0003-0021-2452
Novia Univ Appl Sci, Finland.
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID iD: 0000-0002-9622-3318
2018 (English)In: MethodsX, ISSN 1258-780X, E-ISSN 2215-0161, Vol. 5, p. 136-140Article in journal (Refereed) Published
Abstract [en]

DNA extraction is an essential procedure when investigating microbial communities in environmental samples by sequencing technologies. High clay soils can be problematic as DNA adsorbs to the clay particles and can thereby be preserved from lysed, non-viable cells for a substantial period of time. In order to accurately estimate the intact and living microbial community in the soil, extracellular DNA from dead, remnant bacterial cells needs to be removed prior to DNA extraction. One possibility is to use a sodium phosphate buffer to release both extracellular DNA and bacterial cells from the clay particles. After removing the extracellular DNA by centrifugation, the remaining viable cells can be harvested and DNA extracted. The described method is a modification of a procedure for separating extracellular DNA and bacterial cells from acidic clay soils. The modified method increases bacterial cell yields from acidic clay soils, such as acid sulfate soil. The modified method eliminates some steps from the original method, as only DNA from intact bacterial cells is required. The indirect DNA extraction method increases the workload compared to standard direct extraction methods, but subsequent downstream analyses will give a more representative picture of the viable microbial community composition in the soil.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 5, p. 136-140
Keywords [en]
Indirect DNA extraction, Microbial community, Extracellular DNA, Acid sulfate soil, 16S rRNA gene
National Category
Microbiology
Research subject
Ecology, Microbiology
Identifiers
URN: urn:nbn:se:lnu:diva-75534DOI: 10.1016/j.mex.2018.02.005ISI: 000454531500016PubMedID: 30622912Scopus ID: 2-s2.0-85042686880OAI: oai:DiVA.org:lnu-75534DiVA, id: diva2:1216149
Available from: 2018-06-11 Created: 2018-06-11 Last updated: 2019-08-29Bibliographically approved

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Christel, StephanDopson, Mark

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