Fig. 5
From: Metabolome of flue-cured tobacco is significantly affected by the presence of leaf stem
Physiological and biochemical properties. A Chemical indices and Polyphenol substances composition of tobacco leaves, B Amino acid composition of tobacco leaves. Red represents higher content and green represents lower content. L1, L2, L3, L4, and L5 represent five geographic locations. V1 and V2 represent two varieties of tobacco. L and SPL represent Leaf only and Stem plus leaf, respectively. Three-letter codes represent amino acids