Fig. 3.
Differential production of foliar defence metabolites with Eucalyptus froggattii plant ontogeny. (A) The concentration of secretory cavity-housed sesquiterpenes, monoterpenes and monoterpene acid glucose esters (MAGEs) increases with plant ontogeny, whereas total phenolic concentration decreases. This differential pattern is exemplified in (B) where the mean (± 1 s.e.) proportion of total phenolics to total secretory cavity-housed defence metabolites (terpenoids) decreased in a significantly exponential manner with plant ontogeny (F = 149, P < 0·0001, r2 = 0·88).