Antimutagenicity of Korean Sweet Potato (Ipomoea batatas L.) Cultivars
2011
Park, J.S., Chonbuk National University, Jeonju, Republic of Korea | Bae, J.O., Chonbuk National University, Jeonju, Republic of Korea | Choi, G.H., Jeollabuk-Do Agricultural Research and Extension Services, Iksan, Republic of Korea | Chung, B.W., Chonbuk National University, Jeonju, Republic of Korea | Choi, D.S., Woosuk University, Wanju, Republic of Korea
Polyphenolic content and antimutagenicity of the methanol extracts prepared from 22 cultivars of sweet potato with different flesh colors were investigated using Folin-Ciocalteu's phenol reagent method and Ames test, respectively. There was a remarkable cultivar difference in the polyphenolic content of sweet potato. Su, Hayanmi and Shinhwangmi among 17 cultivars of non-purple sweet potato had higher polyphenolic contents of 21.4, 21.5 and 20.3 ㎍ (GAE/g dried sweet potato), respectively, whereas Manami and Yeonhwangmi were very much lower at 4.6 and 4.8 ㎍. Mokpo No.62, Borami, Sinjami, Jami and Ayamurasaki had much higher polyphenolic contents of 67.7, 76.9, 44.9, 128.3 and 93.2 ㎍, respectively, than non-purple sweet potato. The methanol extract from the sweet potato effectively inhibited the reverse mutation induced by 1-NP, daunomycin, Trp-P-1, Trp-P-2 and 2-AA on S. Typhimurium TA 98, and by 1-NP on S. Typhimurium TA 100. These results suggest that the antimutagencity properties may be influenced by the tested mutagen and strain rather than the polyphenolic content of non-purple and purple sweet potato. However, in the purple sweet potatoes, a high polyphenolic content may influence the antimutagencity properties.
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