3.5. Correlations among volatile molecular markers
Many interesting correlations among volatile compounds detailed in Table 3 were evidenced. Their meaning is obviously an open question. If confirmed in subsequent harvest years and pedoclimatic conditions they would underscore causal links in their biosynthetic pathways. In Table 6 we evidence the most strong quantitative correspondences. For example, the Z-3-hexenal/E-2-hexenal ratio is negatively correlated to the sum of C5 and C6 compounds, hat is in turn are negatively correlated to the total terpenes content. At variance with previous results (E)-2-hexenal (Inarejos-García et al., 2010) was not correlated with the sum of C5 and C6 volatiles; 1-penten-3-one is linearly dependent on (Z)-3-hexenal/(E)-2-hexenal ratio and negatively correlated with (Z)-3-hexen-1-yl acetate and hexyl acetate. Interestingly some LOX pathway compounds deeply interlocks with each other; for example (Z)-3-hexen-1-yl acetate is obviously positively correlated with hexylacetate.