Figure 7

PCA based on relative terpene composition. (a) Sample score plot. Odd numbers: inoculated samples, even numbers: wounded samples. Less susceptible clones (LS) 2405 (circles) and 7398 (squares) are coloured in yellow-red and highly susceptible clones (HS) 3178 (diamonds) and 3340 (triangles) are coloured in green-blue. The percentages of the axes states how much of the variation the PC explain. (b) Corresponding variable loading plot. Monoterpenes (T-1-8), sesquiterpenes (T-9-19) and diterpenes (T-20-37). Further information on terpene numbering (T-#) is found in Additional file 3.