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nph4274-sup-0001-MethodS1_TableS1_FigS1-S4.docxWord document492KFig. S1 A principal component analysis (PC1/PC2) and loading scatter plot including plants harvested in H5. Fig. S2 MS/MS profiles of a proline standard and a C. vulgare root extraction. Fig. S3 Score and loadings scatter plots of Fig. 2. Fig. S4 The relationship between species-average growth rate and relative sucrose concentration in the taproot. Table S1 Prevalence of the compounds sucrose, raffinose, stachyose and verbascose in nine species in a sample root extraction by using GC analysis. Methods S1 Metabolite extraction for mass spectrometry, adapted from Davey et al. (2008).