The effect of low-temperature storage on the sugar content of table potato cultivars

Abstract

The effect of low-temperature storage on the sugar content of table potato cultivars was investigated. Cultivar-specific differences in sugar content during storage were observed. Specifically, the potato varieties "Inca-nomezame" and "Inca-no-hitomi" showed a remarkable increase in sugar content with long-term storage at low temperature. In "Inca-no-mezame", tubers harvested from two different fields showed similar total sugar content after one-month storage under identical storage conditions. Altering the storage temperature from 2° to room temperature decreased sugar content by 40% and 50-70% at one week and one month, respectively. Following one week of storage at room temperature, sugar content was restored to 80% of the original value by storage at 4° for 3 weeks.