Fig. 6 in Headspace GC-MS analysis of differences in intra- and interspecific Terpene profiles of Picea pungens Engelm. and P. abies (L.) Karst

Fig. 6. Selected principal component loadings vs. GC retention times. Loadings are shown for Experiment 1 (three trees over time), PC1 (A) and PC2 (B), Experiment 2 (multiple trees), PC1 (C) and PC2 (D), and Experiment 4 (chiral analysis), PC1 (E) and PC2 (F). Identified compounds are: (1) tricyclene, (2) α-pinene, (3) camphene, (4) sabinene, (5) β-pinene, (6) β-myrcene, (7) 3-carene, (8) limonene, (9) β-phellandrene (coeluting with limonene), (10) 1,8-cineole, (11) γ-terpinene, (12) terpinolene, (13) camphor, and (14) α-terpineol.