Assessment of Antioxidative Capacity in Relation to Seed Trails of Rice Varieties

  • Song, Hong-Keun (Department of Applied Life Science, College of Life & Environment Science, Konkuk University) ;
  • Ahn, Joung-Kuk (Department of Applied Life Science, College of Life & Environment Science, Konkuk University) ;
  • Kim, Kwang-Ho (Department of Applied Life Science, College of Life & Environment Science, Konkuk University) ;
  • Lee, Sun-Joo (Department of Applied Life Science, College of Life & Environment Science, Konkuk University) ;
  • Baek, Jin-Yeong (Department of Applied Life Science, College of Life & Environment Science, Konkuk University) ;
  • Chung, Ill-Min (Department of Applied Life Science, College of Life & Environment Science, Konkuk University)
  • Published : 2006.12.31


In order to assess antioxidant capacity in relation to seed traits of rice (Oryza sativa L.), ninety-six varieties were examined for antioxidative activity of brown rice grain using superoxide dismutase (SOD), 1,1-diphenyl-2-picrylhydrazyl (DPPH), and thiobarbituric acid (TBA) assays. Overall, average total activities measured by the three methods were of very wide range between 64% and 13%. Significant differences were noted depending on the variety and evaluation method. Rice varieties with foreign origin, middle maturity, colored hulls, and colorless awn exhibited statistically significant higher total activity. As for the measurements, total activity was significantly correlated with SOD (r=0.29***), DPPH (r=0.80***) and TBA (r=0.76***). Between the three activities, SOD was not positively correlated with DPPH (r=0.15*), while TBA was significantly correlated with DPPH value (r=0.51***). DPPH (55.20%) and TBA (50.36%) were significantly higher in foreign rice, while SOD activity (44.29%) was significantly higher in domestic rice. However, an average total activity was significantly higher in foreign rice (47.31%) than in domestic rice (35.92%). SOD, DPPH and TBA activities of middle maturity in maturity time were the highest total activity (44.96%) and significantly differed from the other two groups. Total activity was significantly higher in rice with a colorless awn (42.18%) than with a colored awn (35.87%).


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