Rhizosphere Communities of Genetically Modified Zeaxanthin-Accumulating Potato Plants and Their Parent Cultivar Differ Less than Those of Different Potato Cultivars

Nicole Weinert, Remo Meincke, Christine Gottwald, Holger Heuer, Newton C. M. Gomes, Michael Schloter, Gabriele Berg, Kornelia Smalla

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The effects of genetically modified (GM), zeaxanthin-accumulating potato plants on microbial communities in the rhizosphere were compared to the effects of different potato cultivars. Two GM lines and their parental cultivar, as well as four other potato cultivars, were grown in randomized field plots at two sites and in different years. Rhizosphere samples were taken at three developmental stages during plant growth and analyzed using denaturing gradient gel electrophoresis (DGGE) fingerprints of Bacteria, Actinobacteria, Alpha- and Betaproteobacteria, Bacillus, Streptomycetaceae, Pseudomonas, gacA, Fungi, and Ascomycetes. In the bacterial DGGE gels analyzed, significant differences between the parental cultivar and the two GM lines were detected mainly for Actinobacteria but also for Betaproteobacteria and Streptomycetaceae, yet these differences occurred only at one site and in one year. Significant …
Original languageEnglish
Pages (from-to)3859-3865
JournalApplied and Environmental Microbiology
Issue number12
Publication statusPublished - 17 Apr 2009

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