Plant and Soil

, Volume 275, Issue 1, pp 135–146

A Comparison of Soil Microbial Community Structure, Protozoa and Nematodes in Field Plots of Conventional and Genetically Modified Maize Expressing the Bacillus thuringiens is CryIAb Toxin

  • B.S. Griffiths
  • S. Caul
  • J. Thompson
  • A.N.E. Birch
  • C. Scrimgeour
  • M.N. Andersen
  • J. Cortet
  • A. Messéan
  • C. Sausse
  • B. Lacroix
  • P.H. Krogh
Article

DOI: 10.1007/s11104-005-1093-2

Cite this article as:
Griffiths, B., Caul, S., Thompson, J. et al. Plant Soil (2005) 275: 135. doi:10.1007/s11104-005-1093-2

Abstract

Field trials were established at three European sites (Denmark, Eastern France, South-West France) of genetically modified maize (Zea mays L.) expressing the CryIAb Bacillus thuringiensis toxin (Bt), the near-isogenic non-Bt cultivar, another conventional maize cultivar and grass. Soil from Denmark was sampled at sowing (May) and harvest (October) over two years (2002, 2003); from E France at harvest 2002, sowing and harvest 2003; and from SW France at sowing and harvest 2003. Samples were analysed for microbial community structure (2003 samples only) by community-level physiological-profiling (CLPP) and phospholipid fatty acid analysis (PLFA), and protozoa and nematodes in all samples. Individual differences within a site resulted from: greater nematode numbers under grass than maize on three occasions; different nematode populations under the conventional maize cultivars once; and two occasions when there was a reduced protozoan population under Bt maize compared to non-Bt maize. Microbial community structure within the sites only varied with grass compared to maize, with one occurrence of CLPP varying between maize cultivars (Bt versus a conventional cultivar). An overall comparison of Bt versus non-Bt maize across all three sites only revealed differences for nematodes, with a smaller population under the Bt maize. Nematode community structure was different at each site and the Bt effect was not confined to specific nematode taxa. The effect of the Bt maize was small and within the normal variation expected in these agricultural systems.

Keywords

Bacillus thuringiensis toxin genetically modified plants maize microbial community structure nematodes protozoa 

Copyright information

© Springer 2005

Authors and Affiliations

  • B.S. Griffiths
    • 1
  • S. Caul
    • 1
  • J. Thompson
    • 1
  • A.N.E. Birch
    • 1
  • C. Scrimgeour
    • 1
  • M.N. Andersen
    • 2
  • J. Cortet
    • 3
  • A. Messéan
    • 4
  • C. Sausse
    • 4
  • B. Lacroix
    • 5
  • P.H. Krogh
    • 6
  1. 1.Scottish Crop Research InstituteDundeeUK
  2. 2.Department of Crop Physiology and Soil Science, Danish Institute of Agricultural SciencesResearch Centre FoulumTjeleDenmark
  3. 3.Institut Méditerranéen d'Ecologie et PaléoécologieUniversité Saint JérômeMarseille cedex 20France
  4. 4.Centre technique interprofessionnel des Oléagineux métropolitainsCentre de GrignonThiverval GrignonFrance
  5. 5.ARVALIS - Institut du végétal station Inter-instituts 6BaziègeFrance
  6. 6.Soil Fauna and Ecotoxicology Research Unit, Department of Terrestrial EcologyNational Environmental Research InstituteSilkeborgDenmark

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