What would be the effect of the following on glycolysis, fermentation, citric acid cycle, oxidative phosphorylation, reduction of oxygen, transport of molecules across inner mitochondrial membrane and so forth?

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?