Abstract:

Pigmented potato (Solanum tuberosum L.) is one of the major sources of anthocyanins, which possess highantioxidant activity. The total anthocyanins content (TAC) of 10 pigmented potato varieties were measured by pH differentialmethod and the total antioxidant activities were measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. The resultsshowed that the TACs of potato peel, potato flesh and whole potato were in the ranges of 59.67–293.57, 0–56.11 and 1.34–63.32mg/100 g, respectively. The ascorbic acid equivalent antioxidant capacity (AEAC) of potato peel, potato flesh and whole potatowas in the ranges of 2.74–6.43, 0.50–1.39 and 0.65–1.50 mg/g, respectively. The cultivar Ziyun 1 contained the highest TACand AEAC, while the cultivars S05-603 and S03-2677 had the lowest TAC and AEAC, respectively. In addition, the correlationbetween total anthocyanin content and total antioxidant activity of whole pigmented potato was extremely significantly positive (P ＜ 0.01).

Key words: pigmented potato, anthocyanin, anthocyanidin, pH differential method, DPPH method, ascorbic acid equivalent antioxidant capacity (AEAC), antioxidant activity