Acknowledgements
Artemisia F1seed and Broccoli seeds were kindly provided by the Department of Biology, University of York, York, UK and Bejo seed company (Trambaan1, 1749 CZ Warmenhuizen, The Netherlands), respectively. We are grateful to Bert Schipper and Henriƫtte Vaneekelen for their help with LC-MS analysis and pre-processing of metabolomics data.