Significance (※) of components when sample grouping is based on resins’ tapping method

CompoundVIP (PLS-DA)P-value (t-test)Log2 fold change
1,4-Cineole1.99276.62E-062.4897
Terpinen-4-ol1.72652.21E-041.3314
Estragole1.48202.95E-03–0.7253
p-Cymene1.30848.75E-030.3231
2-Nonanol1.15570.0296–0.3828
α-Copaene1.06040.03600.4718
γ-Terpinene0.87900.11250.4138
Limonene0.86730.13240.2572
Fenchol0.69710.3877–0.1622
α-Pinene0.68930.3046–0.4170
β-Myrcene0.68130.78980.0548
Myrtenol0.65610.7157–0.0667
α-Terpinolene0.63980.4267–0.2152
α-Terpineol0.62380.4139–0.1925
β-Caryophyllene0.61980.64550.1027
Linalool0.58890.3217–0.2596
2-Nonanone0.57260.4197–0.1006
Endo-borneol0.55750.38450.1247
Camphene0.36210.9233–0.0230

※: significant values with VIP > 1.0 for multivariate analysis and P < 0.05 for univariate analysis are denoted in bold; †: a negative Log2 fold change indicates a direction towards resins of natural tapping