Content of polyphenol and â-glucan of naked and covered barley varieties grown in Korea.
Mi Ja Lee1, Yang Kil Kim1, Chul Soo Park1, Jung Gon Kim1, Hyung Soon Kim2, Jae Hwan Seo1, and Jong Jin Hwang1. (1) Honam Agricultural Research Institute, 381 Songhak-dong, Iksan, Jeollabuk-do, 570-080, South Korea, (2) Dept. of Environmental & Chemical engineering, Seonam University, 720 Gwangchi-dong, Namwonsi, Jeollabuk-do, 590-711, South Korea
Barley is one of the earliest cultivated cereal grains in the world and is gaining renewed interest for food use due to its hypocholesterolemic effect and other desirable nutritional and functional characteristics. There are a variety of food applications of barley in India, China, Japan, Korea and West Asia-North Africa region. Total phenol content and whiteness of cooked barley during storage were measured to evaluate the relationship between discoloration potential and polyphenol content in barley. we analyzed the content of total and soluble β-glucan in various Korean barley cultivar and investigate the ratios of soluble β-glucan to total β-glucan. Total phenol content was 0.17-0.3 % in naked barley lines and 0.15-0.28 % in covered barley lines.During storage, the whiteness of cooked barley slowly decreased, up to 6 hrs, rapidly decrease, up to 12 hrs, and then slowly decrease to 24 hrs. Total β-glucan content among examined 27 naked barley was the highest, 9.72, in Doowonchapssalbori. Range was 3.86-9.72. Soluble β-glucan ranged 2.36-5.56. Total β-glucan content among 25 covered barley was the highest, 7.39, in Seodunchalbori and range was 4.13-7.39. Soluble β-glucan ranged 2.68-5.20. Soluble β-glucan correlated with the total β-glucan.The correlation coefficient between the total and soluble β-glucan in non-waxy and waxy was r2=0.859, 0.817 respectively. and in covered and naked barley, the correlation coefficient was r2=0.941, 0.871 respectively.