Fig. 4. Percentage electrolyte leakage measured in young leaves (YL) and older leaves (OL) of rose clover at Time 0, and 30, 60, and 90 min after being exposed to -12 and -14°C in Exp. 4. Error bars represent the SD where the error exceeds the size of the data symbol. Within each test temperature, mean values followed by the same letter are not significantly different at P < 0.01.