Sucrose transporters are essential proteins for the allocation of assimilates from source to sink. With increasing information about their function and the role of the sucrose molecule, acting as an informational and signaling molecule, new questions arise on how sucrose transporters could interact or coordinate metabolic pathways and developmental processes and to integrate whole plant communication. New information about the phloem mobility of sucrose transporter mRNAs and other phloem mobile signals is also available, shedding light on the long-distance transport of leaf-derived information to terminal sink organs. Recent advances on the subcellular localisation and function of sucrose transporters, sucrose facilitators and sucrose transporter-like proteins open new questions about the role of membrane compartmentation on the dimerization, endocytosis, degradation and signaling of plant sucrose transporters.