The contribution of soil constituents to adsorption of extracellular DNA by soils
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Updated: Jun 2, 2026

Extraction of High Molecular Weight Genomic DNA from Soils and Sediments
Published on: November 10, 2009
Kazutoshi Saeki1, Mayumi Morisaki, Masao Sakai
1Biotron Institute, Kyushu University, Hakozaki, 6-10-1 Higashi-ku, Fukuoka 812-8581, Japan.
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 (H(2)O(2)) 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 H(2)O(2)-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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