Volatiles are responsible for making a tomato taste like a tomato, and while there are several hundred of them in this fruit, only 15-20 actually impact our perception of its flavor the University of Florida, Klee Lab Research found. However, storing tomatoes in the fridge can create a drastic loss in volatiles. After 30 days in the fridge, the concentration of volatiles decreased by 66 percent. "Storing tomatoes at fridge temperature, even for short durations, was detrimental for their aroma." The cold temperature also starts manipulating the character of the tomatoes and they become pulpy and mildewed. The best bet is to keep tomatoes on the counter or in a paper bag in a dry place.