Figure 2: Effects of exposure to different R:FR light ratios on the
blend of volatile organic compounds (VOCs) collected from either
uninfested or whitefly-infested tomato (Solanum lycopersicum cv
Moneymaker) plants. (A) Multivariate comparison using orthogonal
projection to latent structures-discriminant analysis (OPLS-DA) between
uninfested plants exposed to different R:FR light ratios
(+FRU = 0.6, n = 11; CLU = 1.2, n = 13;
-FRU = 8.2, n = 13), displayed in a two-dimensional
score plot. (B) Loading plot indicating the contribution of each VOC to
the separation between uninfested plants exposed to different R:FR light
ratios. (C) Same analysis as described for (A) but now comparing plants
infested with Trialeurodes vaporariorum whiteflies and exposed to
different R:FR light ratios (+FRWF n = 13;
CLWF n = 11; -FRWF n = 14). (D) Loading
plot indicating the contribution of each VOC to the separation between
whitefly-infested plants exposed to different R:FR light ratios. For VOC
identification: the numbers in the loading plots correspond to the
numbers in Table S1.