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The data presented here were derived by 1 H NMR metabolic profiling of stamnagathi ( Cichorium spinosum L.) plants following treatments with different isosmotic salt solutions; eight saline nutrient solutions with two different levels of total molar concentrations, which were obtained by adding different amounts of NaCl, KCl, Na 2 SO 4 or CaCl 2 to the replenishment nutrient solution, were applied. The 1 H NMR metabolite profiles of stamnagathi plants', which are included in this article, were recorded 56 days after transplanting. Since stamnagathi is a niche product combining unique taste and superior phytonutrient content (e.g. vitamins C and K1, lutein, β-carotene, tocopherols, phenolic acids, fatty acids, minerals, and glutathione), the dataset could serve as a reference for future metabolomics studies related to the investigation of the effects of the four salinity sources on the plant's metabolism. Also, the dataset could be a valuable resource for the discovery of validated biomarkers of the plant's tolerance to salinity stress and responses to new plant protection products (e.g. bioelicitors). The dataset support the research article "Salinity source alters mineral composition and metabolism of Cichorium spinosum " authored by Ntatsi et al., (2017) [1]., Competing Interests: The authors declare no conflict of interest., (© 2020 The Authors.)

The GC/EI/MS metabolite profiles of Lemna minor L. plants were recorded following treatments with sub-lethal concentrations of the herbicidal active ingredients (a.i.) metribuzin and glyphosate, and various of their binary mixtures. The raw GC/EI/MS total ion chromatograms (*.cdf format) of the Lemna 's endo-metabolomes were recorded, which are included in this article. Since Lemna is a model organism in ecotoxicological studies, the dataset could serve as a reference for Lemna metabolomics studies related to the investigation of the effects of phytotoxic compounds and their mixtures on its metabolism. Also, the dataset could be a valuable resource for the discovery of validated biomarkers of the toxicity of mixtures. The dataset support the research article " Kostopoulou et al. , Assessment of the effects of metribuzin, glyphosate, and their mixtures on the metabolism of the model plant Lemna minor L.  applying metabolomics. "Chemosphere 239, 2020, 124582.", (© 2019 Published by Elsevier Inc.)