Figure 3. Allocation of constitutive and induced concentration of nitrogen across different pine parts.

Nitrogen concentration in (a) the phloem, (b) the xylem and (c) the needles across three parts of the plants (basal, middle and apical upper part) in control (constitutive, white bars) and methyl jasmonate (MJ) induced (black bars) P. radiata juveniles. Plants were destructively sampled 15 days after application of MJ. Bars are means ± s.e.m. (N = 12 for phloem and needle tissues and N = 6 for xylem tissue). Asterisks indicate significant differences within each plant part due to MJ-induction at P<0.05 (*), P<0.01 (**) and P<0.001 (***).