UNSPECIFIED (1999) Comparison of different methods for the isolation and purification of total community DNA from soil. JOURNAL OF MICROBIOLOGICAL METHODS, 39 (1). pp. 1-16. ISSN 0167-7012

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Abstract

The efficiency and reproducibility of DNA extraction from soil was tested for variations in lyric and purification treatments and their effect on yield and purity of DNA. The extraction yield was improved by increasing the concentration of EDTA or monovalent ions in isolation buffers,, by the introduction of mechanical lysis treatments, and by the use of ethanol precipitation in place of PEG precipitation. Purity was improved using buffers with decreasing concentration of EDTA or by reducing the ionic strength of the buffer, and by all mechanical treatments. No lyric treatment was efficient on its own, the highest purity was achieved using Crombach buffer and a combination of bead-beating with lysozyme and SDS lysis followed by potassium acetate and PEG precipitation, phenol/chloroform purification, isopropanol precipitation, and spermine-HCl precipitation. Sonication sheared the DNA more than bead-heating. Lysozyme and SDS lysis without any mechanical treatments allowed isolation of larger fragments (40-90 kb). Denaturing gradient gel electrophoresis analysis of DNA isolated using a range of lyric treatments revealed alterations in band patterns which might reflect differences in the efficiency of lytic treatments. (C) 1999 Elsevier Science B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QR Microbiology
Journal or Publication Title:	JOURNAL OF MICROBIOLOGICAL METHODS
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0167-7012
Date:	December 1999
Volume:	39
Number:	1
Number of Pages:	16
Page Range:	pp. 1-16
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/13988

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