Effects of Drying Temperature on the Saponin and Free Sugar Contents of Platycodon grandiflorum Radix

건조 온도에 따른 도라지의 사포닌과 당 함량 변화

  • Lee, Byung-Jin (Department of Agronomy & Medicinal Plant Resourses, Gyeongnam National University of Science and Technology) ;
  • Cho, Young-Son (Department of Agronomy & Medicinal Plant Resourses, Gyeongnam National University of Science and Technology)
  • 이병진 (경남과학기술대학교 농학.한약자원학부) ;
  • 조영손 (경남과학기술대학교 농학.한약자원학부)
  • Received : 2014.05.29
  • Accepted : 2014.09.26
  • Published : 2014.12.31


This study was conducted to provide basic information on the effects of drying temperatures (45, 65, and $85^{\circ}C$) on saponins and free sugar contents of a 5-year-old Platycodon grandiflorum Radix. Platycodin D levels decreased with increase in drying temperature (956, 334, and 197 mg% at 45, 65, and $85^{\circ}C$, respectively). Polygalacin D levels were the highest at $45^{\circ}C$ (577 mg%), while platycodin $D_3$ and deapioplatycodin D were high at $65^{\circ}C$ (304 and 272 mg%, respectively). Sucrose levels were 3,825 mg% at $85^{\circ}C$ and 1,226 mg% at $45^{\circ}C$, and decreased when the drying temperature was decreased. The sucrose content showed significant negative correlation with saponin levels in dried P. grandiflorum ($-0.987^{**}$, p<0.01). These results suggested that drying P. grandiflorum at low temperatures is more economically viable.


Supported by : 농촌진흥청


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