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- Title
Discrimination of conventional and organic white cabbage from a long-term field trial study using untargeted LC-MS-based metabolomics.
- Authors
Mie, Axel; Laursen, Kristian; Åberg, K.; Forshed, Jenny; Lindahl, Anna; Thorup-Kristensen, Kristian; Olsson, Marie; Knuthsen, Pia; Larsen, Erik; Husted, Søren
- Abstract
The influence of organic and conventional farming practices on the content of single nutrients in plants is disputed in the scientific literature. Here, large-scale untargeted LC-MS-based metabolomics was used to compare the composition of white cabbage from organic and conventional agriculture, measuring 1,600 compounds. Cabbage was sampled in 2 years from one conventional and two organic farming systems in a rigidly controlled long-term field trial in Denmark. Using Orthogonal Projection to Latent Structures-Discriminant Analysis (OPLS-DA), we found that the production system leaves a significant ( p = 0.013) imprint in the white cabbage metabolome that is retained between production years. We externally validated this finding by predicting the production system of samples from one year using a classification model built on samples from the other year, with a correct classification in 83 % of cases. Thus, it was concluded that the investigated conventional and organic management practices have a systematic impact on the metabolome of white cabbage. This emphasizes the potential of untargeted metabolomics for authenticity testing of organic plant products.
- Subjects
LARGE white (Insect); METABOLOMICS; BRASSICA; COTTON trade; ORGANIC farming
- Publication
Analytical & Bioanalytical Chemistry, 2014, Vol 406, Issue 12, p2885
- ISSN
1618-2642
- Publication type
Article
- DOI
10.1007/s00216-014-7704-0