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DNA Extraction from Soils: Old Bias for New Microbial Diversity Analysis Methods

By F. Martin-Laurent, L. Philippot, S. Hallet, R. Chaussod, J. C. Germon, G. Soulas and G. Catroux

Abstract

The impact of three different soil DNA extraction methods on bacterial diversity was evaluated using PCR-based 16S ribosomal DNA analysis. DNA extracted directly from three soils showing contrasting physicochemical properties was subjected to amplified ribosomal DNA restriction analysis and ribosomal intergenic spacer analysis (RISA). The obtained RISA patterns revealed clearly that both the phylotype abundance and the composition of the indigenous bacterial community are dependent on the DNA recovery method used. In addition, this effect was also shown in the context of an experimental study aiming to estimate the impact on soil biodiversity of the application of farmyard manure or sewage sludge onto a monoculture of maize for 15 years

Topics: Methods
Publisher: American Society for Microbiology
Year: 2001
DOI identifier: 10.1128/AEM.67.5.2354-2359.2001
OAI identifier: oai:pubmedcentral.nih.gov:92877
Provided by: PubMed Central
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