Fig. 4.

List of volatile compounds identified by GC-MS analysis in the three experimental conditions adopted in this work (CLSA sampling plus separation on non-polar column, SPME sampling plus separation on non-polar column, SPME sampling plus separation on polar column). The chroma scale indicates the relative variation of emission from inoculated flowers, in comparison to control ones (expressed as log₂ of peak area ratio). The P-value of differences between control and inoculated flowers is proportional to the relative circle diameter. The compounds are divided in the following chemical groups: 1 – acids; 2 – alcohols; 3 – aldehydes; 4 – alkanes; 5 – alkenes; 6 – nitrogen compounds; 7 – esters; 8 – ethers; 9 – homoterpenes; 10 – benzene compounds; 11 – ketones; 12 – furans; 13 – monoterpenes; 14 – sesquiterpenes; 15 – sulfur compounds