Proportions of amino acids in the nectar and pollen produced by fertilized (black) and control (blank) plants.

<p>Significance of the differences between the fertilization and control treatment were determined through Wilcoxon signed-rank tests using Bonferroni corrections to correct for multiple testing (*** <i>P</i> < 0.001; ** <i>P</i> < 0.01; * <i>P</i> < 0.05).