Fig. 7. Schematic changes in trifoliate orange seedlings due to boron (B) deficiency stress. Compounds in blue indicate a decrease because of B-deficiency stress and in red represent
an increase. Metabolic pathways shown in blue and red are assumed to be down-regulated and up-regulated by B deprivation, respectively. The pathways highlighted in light green
font had no clear changes between control and B deficiency. Abbreviations are as follows: PPP: Pentose Phosphate Pathway; TCA: Tricarboxylic Acid cycle. (For interpretation of the
references to colour in this figure legend, the reader is referred to the web version of this article.)