Studies on the Biological Activities and Physicochemical Characteristics of Pigments Extracted from Korean Purple-Fleshed Potato

摘要

General composition, total anthocyan content, and antioxidative and antimicrobial activities of Korean purple-fleshed potatoes (varieties A-D based on coloring degree of cross sections) were investigated. Slight differences in composition content wereobserved among varieties. Color intensity analyzed by sensory evaluation test decreased in order of PL-14, 31, 28, 3, 17, and 6. Total anthocyanin contents differed significantly among varieties from 3 to 29 mg per 100 g, and decreased in order of PL-28, 31, 14, 12, 5, and 3. PL-28, 31, and Jasim potatoes showed slightly higher antioxidant activities than a-tocopherol. PL-28, 31, 6, and Jasim showed antimicrobial activities against three species each of Gram-positive and -negative bacteria, with highest activities observed against Bacillus subtilis and relatively high activities against E. coli.