Phloem translocation answers
Radioactive isotopes can be used track the movement of sucrose by translocation in the phloem. The radioactivity can be traced using photographic film (an autoradiograph). In a typical experiment like those carried out by Bidulph and Cory at Washington State university in the 1960s a plant is grown in the lab and one leaf is exposed for a short time to carbon dioxide containing the radioactive isotope 14C. The...