Discrimination of conventional and organic white cabbage from a long-term field trial study using untargeted LC-MS-based metabolomics
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- Discrimination of conventional and organic white cabbage from a long-term field trial study using untargeted LC-MS-based metabolomics
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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.
Originalsprog | Engelsk |
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Tidsskrift | Analytical and Bioanalytical Chemistry |
Vol/bind | 406 |
Udgave nummer | 12 |
Sider (fra-til) | 2885-2897 |
Antal sider | 13 |
ISSN | 1618-2642 |
DOI | |
Status | Udgivet - 2014 |
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