Production of 8-epi-Tomentosin by Plant Cell Culture of Xanthium strumarium

  • Park, Jae-Sung (Faculty of Engineering, Keimyung University) ;
  • Yi, Gi-Hwan (National Yeongnam Agricultural Experiment Station, RDA) ;
  • Nam, Min-Hee (National Yeongnam Agricultural Experiment Station, RDA) ;
  • Park, Sun-Ho (Faculty of Engineering, Keimyung University and Biotechnology Research Institute, Bicosys Co.Ltd.)
  • Published : 2001.01.01

Abstract

This study was conducted to establish a plant cell culture system for the production of medically important secondary metabolites from Xanthium strumarium. The effects of plant growth regulators including NAA, 2,4-D, kinetin, and ABA were examined in terms of callus induction, maintenance of callus and suspension cultures. It was shown that callus was induced upon treatment with NAA while embryo was induced after treatment with 2,4-D. Callus formation was further improved by treatment with ABA and NAA. The level of callusing increased by 17-29% for the seed case, cotyledon, leaf, and hypocotyl and by 96% in the case of the root. Suspension cell lines were established using calli produced from cotyledon, hypocotyl and root and cultured at 25$\^{C}$ under light conditions. The cells grew up to 15g/L with NAA 2ppm, BA 2ppm, and ABA 1ppm treatment. Supernatants of suspension cultures of cell lines derived from coyledon and hypocotyl produced some distinctive secondary metabolites, one of which was identified as 8-epi-tomentosin, which belongs to the xanthanolides. The amounts of 8-epi-tomentosin produced by the cotyledon- and hypocotylderived cell lines were 13.4mg/L and 11.0mg/L, respectively.

Keywords

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