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General Information

Document type
  • Peer-reviewed journal article
Study Type
  • field study
  • composition
GE organism
  • wheat
GE trait
  • quality
Country
  • UK

Results

Equivalence
  • no effect

A metabolomic study of substantial equivalence of field-grown genetically modified wheat

Baker, John M; Hawkins, Nathaniel D; Ward, Jane L; Lovegrove, Alison; Napier, Johnathan A; Shewry, Peter R; Beale, Michael H
Plant Biotechnology Journal. 2006 June. 4(4):381-392

Link to full text (journal may charge for access)

PMID: 17177804 DOI: 10.1111/j.1467-7652.2006.00197.x

Abstract

The 'substantial equivalence' of three transgenic wheats expressing additional high-molecular-weight subunit genes and the corresponding parental lines (two lines plus a null transformant) was examined using metabolite profiling of samples grown in replicate field trials on two UK sites (Rothamsted, Hertfordshire and Long Ashton, near Bristol) for 3 years. Multivariate comparison of the proton nuclear magnetic resonance spectra of polar metabolites extracted with deuterated methanol-water showed a stronger influence of site and year than of genotype. Nevertheless, some separation between the transgenic and parental lines was observed, notably between the transgenic line B73-6-1 (which had the highest level of transgene expression) and its parental line L88-6. Comparison of the spectra showed that this separation resulted from increased levels of maltose and/or sucrose in this transgenic line, and that differences in free amino acids were also apparent. More detailed studies of the amino acid composition of material grown in 2000 were carried out using gas chromatography-mass spectrometry. The most noticeable difference was that the samples grown at Rothamsted consistently contained larger amounts of acidic amino acids (glutamic, aspartic) and their amides (glutamine, asparagine). In addition, the related lines, L88-6 and B73-6-1, both contained larger amounts of proline and gamma-aminobutyric acid when grown at Long Ashton than at Rothamsted. The results clearly demonstrate that the environment affects the metabolome and that any differences between the control and transgenic lines are generally within the same range as the differences observed between the control lines grown on different sites and in different years.

Keywords

gas chromatography-mass spectrometry (GC-MS); genetically modified (GM) crops; high-molecular-weight (HMW) subunits; metabolic fingerprinting; metabolomics; nuclear magnetic resonance (NMR); substantial equivalence; wheat

Funding

Funding source
  • Biotechnology and Biological Sciences Research Council
  • UK Food Standards Agency
  • Syngenta
Funding country
  • UK
  • Switzerland
Funding type
  • government
  • industry: same

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Cite this study

MLA

Baker, John M, Nathaniel D Hawkins, Jane L Ward, Alison Lovegrove, Johnathan A Napier, Peter R Shewry, Michael H Beale. "A metabolomic study of substantial equivalence of field-grown genetically modified wheat." Plant Biotechnology Journal 4.4 (2006): 381-392. Web. 11 Dec. 2018.

APA

Baker, John M., Hawkins, Nathaniel D., Ward, Jane L., Lovegrove, Alison., Napier, Johnathan A., Shewry, Peter R., Beale, Michael H. (2006). A metabolomic study of substantial equivalence of field-grown genetically modified wheat. Plant Biotechnology Journal, 4(4), 381-392. doi:10.1111/j.1467-7652.2006.00197.x

Please verify citations before use, citations are automatically generated based on information stored within the GENERA database and therefore may or may not be correct.