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Bioresources and Bioprocessing
Fig. 1 | Bioresources and Bioprocessing

Fig. 1

From: Integrated characterization of filler tobacco leaves: HS–SPME–GC–MS, E-nose, and microbiome analysis across different origins

Fig. 1

Analysis of the free amino acids and organic acids of the filler tobacco leaves. A Free amino acids concentrations. B Proportion, species, and amount distribution C of different classes of free amino acids. D Chemical elements proportion. E Difference of chemical constituents in each group of filler tobacco leaves. (See data Additional file 1: Tables S2, S3, S4 and S5). DHMS, DHRL, LCGM, PEJC, PENE, and YNYX, respectively, denote distinct geographical region names, The cigar tobacco samples are categorized into six distinct grades, designated as A (Fi-B-1-Bt-S), B (Fi-B-2-Bt-S), C (Fi-C-1-Bt-L), D (Fi-C-2-Bt-L), E (Fi-X-3-Bt-M), and F (Fi-X-4-Bt-M). Subscripted numbers 1 through 6, which denote their geographical origins: 1 for DHMS, 2 for DHRL, 3 for LCGM, 4 for PEJC, 5 for PENE, and 6 for YNYX, respectively

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