The Contribution of Soil Constituents to Adsorption of Extracellular DNA by Soils

Kazutoshi Saeki; Mayumi Morisaki; Masao Sakai

doi:10.1264/jsme2.ME08531

Microbes and Environments

Online ISSN : 1347-4405
Print ISSN : 1342-6311
ISSN-L : 1342-6311

Short Communications

The Contribution of Soil Constituents to Adsorption of Extracellular DNA by Soils

Kazutoshi Saeki, Mayumi Morisaki, Masao Sakai

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Keywords: DNA adsorption, soil DNA, hydrogen peroxide treatment, acid oxalate treatment, oxide minerals

JOURNAL FREE ACCESS

2008 Volume 23 Issue 4 Pages 353-355

DOI https://doi.org/10.1264/jsme2.ME08531

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Abstract

The adsorption of DNA by an andosol was much greater than that by a fluvisol or acrisol. The decrease in soil organic matter on treatment with hydrogen peroxide (H₂O₂) little affected DNA adsorption per weight of the particles, implying that the organic matter is not involved in the adsorption. The acid oxalate treatment of the H₂O₂-treated soils decreased DNA adsorption. Among soil constituents, acid oxalate-extractable materials such as allophane and noncrystalline Al and Fe oxides are likely to make a major contribution to the adsorption of DNA.

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