The initial short-distance pathway is probably symplastic (Figure 11.14). However, sugars might move entirely through the symplast (cytoplasm) to the sieve elements via the plasmodesmata (see Figure 11.14A), or they might enter the apoplast prior to phloem loading (see Figure 11.14B).
"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.











