To investigate the impact of solute concentration during osmosis, Shila designs an experiment. She divides four identically sized and weighed potato cubes into test tubes I, II, Ill, and IV, each of which has a different concentration of sucrose at 1%, 2%, 3%, and 4%, respectively. She takes the cubes out of the test tubes after an hour, wipes them with a paper towel, and weighs them to determine the ultimate mass of each cube. The cytoplasm of the potato cells was hypertonic to the fluid in test tube III. What modification will be seen in test tube Ill's potato cube?