Curing treatment: Potatoes were packed in Polyethylene (PE) plastic bags and put in a thermostat-controlled cabinet for 10 days. One group was stored at 16 ± 1 °C for curing, while the other group was stored at 2–3 °C (commercial storage temperature in China) as control (CK). Three samples were taken at 0, 5, 10 days, during curing treatment period.