Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 406, Issue 12, Pages 2885-2897Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-014-7704-0
Keywords
Conventional agriculture; Long-termfield trial; Metabolomics; Organic agriculture; White cabbage
Funding
- Ekhagastiftelsen, Stockholm, Sweden [2008-33]
- Ministry of Food, Agriculture and Fisheries, Denmark through the International Centre for Research in Organic Food Systems (ICROFS) via the VegQure project [3304-FOJO-05-45-07]
- OrgTrace project [3304-FOJO-05-45-01]
- CORE Organic II EU project, AuthenticFood
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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.
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