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Applied and Environmental Microbiology, December 2001, p. 5849-5854, Vol. 67, No. 12
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.12.5849-5854.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Variation of Microbial Communities in Soil, Rhizosphere, and Rhizoplane in Response to Crop Species, Soil Type, and Crop Development

Gabriele Wieland,dagger Regine Neumann, and Horst Backhaus*

Federal Biological Research Centre for Agriculture and Forestry, Institute for Plant Virology, Microbiology and Biosafety, 38104 Braunschweig, Germany

Received 23 May 2001/Accepted 20 September 2001

We investigated the influence of plant species, soil type, and plant development time on the shaping of microbial communities in soil and in association with roots. The sample group consisted of a total of 32 microcosms in three habitats: soil, rhizosphere, and rhizoplane. Communities were represented by the patterns of a sequence-specific separation of rRNA target sequences. Effects of experimental parameters were classified by a cluster analysis of pattern similarities. The type of plant species (clover, bean, or alfalfa) had the greatest effect in plant-associated habitats and also affected soil patterns. Plant development had a minor habitat-dependent effect that was partly obscured by replicate variation. The results stress the applicability of biased community representations in an analysis of induced variation.

* Corresponding author. Mailing address: Institute for Plant Virology, Microbiology and Biosafety, Federal Biological Research Centre for Agriculture and Forestry, Messeweg 11-12, D-38104 Braunschweig, Germany. Phone: (49) 531 299 3806. Fax: (49) 531 299 3013. E-mail: h.backhaus{at}bba.de.

dagger Present address: Lower Saxony State Agency for Ecology, 31135 Hildesheim, Germany.

Applied and Environmental Microbiology, December 2001, p. 5849-5854, Vol. 67, No. 12
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.12.5849-5854.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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