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Proteomic analysis of MON810 and comparable non-GM maize varieties grown in agricultural fields

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Abstract

Worldwide maize is the second major agricultural commodity and around one-fourth is currently biotech, with significant application of the insect resistant event MON810 particularly in the European Union. Grains are the major commercialized part of the plant, and can be harvested after maturity (for food and feed purposes) or at late milky-starchy stage (for forage uses, with the whole plant). We assessed possible proteomic unintended effects of the MON810 transgene using two-dimensional gel electrophoresis coupled to mass spectrometry. To keep in a realistic scenario we used plants grown in agricultural fields in a region where ~50% of maize was MON810, and analyzed grains at milky-starchy stage. In maize, differential transcripts and metabolites between GM and comparable non-GM varieties tend to be variety specific. Thus, we analyzed two variety pairs, DKC6575/Tietar and PR33P67/PR33P66 which are considered representative of Food and Agriculture Organization 700 and 600 varieties commercially grown in the region. MON810 and non-GM milky-starchy grains had virtually identical proteomic patterns, with a very small number of spots showing fold-variations in the 1-1.8 range. They were all variety specific and had divergent identities and functions. Although 2DE allows the analysis of a limited dataset our results support substantial equivalence between MON810 and comparable non-GM varieties.

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Fig. 1

Abbreviations

2DE:

Two-dimensional gel electrophoresis

CRM:

Certified reference material

EU:

European Union

FAO:

Food and Agriculture Organization

GMO:

Genetically Modified Organism

MS:

Mass spectrometry

MSDB:

Mass spectrometry protein sequence data base

PCR:

Polymerase chain reaction

V8:

Vegetative eight-leaf stage

DAF:

Days after flowering

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Acknowledgments

We thank R. Collado (UdG), S. Irar (CRAG), D. Centeno and V. Rofidal (INRA) for technical support; and J. Serra (E.E.A. Mas Badia), E. Melé and J. Messeguer (CRAG) for valuable suggestions. This work was financially supported by the Spanish MEC project with ref. AGL2007-65903/AGR. AC received a studentship from the Generalitat de Catalunya (2005FI 00144).

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Authors and Affiliations

  1. Institute for Food and Agricultural Technology (INTEA), University of Girona, Campus Montilivi, EPS-I, 17071, Girona, Spain

    Anna Coll, Anna Nadal & Maria Pla

  2. National Institute for Agricultural Research (INRA), UR1199, LPF, 2, Place Pierre Viala–Bât. 13, 34060, Montpellier Cedex 01, France

    Michel Rossignol

  3. Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB, Jordi Girona, 18, 08034, Barcelona, Spain

    Pere Puigdomènech

Authors
  1. Anna Coll
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  2. Anna Nadal
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  3. Michel Rossignol
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  4. Pere Puigdomènech
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  5. Maria Pla
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Corresponding author

Correspondence to Maria Pla.

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Coll, A., Nadal, A., Rossignol, M. et al. Proteomic analysis of MON810 and comparable non-GM maize varieties grown in agricultural fields. Transgenic Res 20, 939–949 (2011). https://doi.org/10.1007/s11248-010-9453-y

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