Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Effect of Fungal Elicitor and Heavy Metals on the Production of Flavonol Glycosides in Cell Cultures of Ginkgo biloba

  • KIM, MIN SOO (Department of Molecular Science and Technology, and Division of Chemical Engineering and Biotechnology, College of Engineering, Ajou University) ;
  • CHUL KIM (Department of Molecular Science and Technology, and Division of Chemical Engineering and Biotechnology, College of Engineering, Ajou University) ;
  • DO HYUN JO (Department of Molecular Science and Technology, and Division of Chemical Engineering and Biotechnology, College of Engineering, Ajou University) ;
  • YEON WOO RYU (Department of Molecular Science and Technology, and Division of Chemical Engineering and Biotechnology, College of Engineering, Ajou University)
  • Published : 1999.10.01
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Abstract

The effect of fungal elicitor and heavy metal salts on the production of flavonol glycosides in cell cultures of Ginkgo biloba was investigated. Among the fungi tested, Trichoderma longibrachiatum ATCC 52326 was found to be the most efficient in the production of flavonol glycosides. Kaempferol production from the elicited callus increased ten-fold as compared to the unelicited callus, while quercetin concentration of elicited cells was nine-fold higher than that of uneliceited cells in suspension cultures. The maximum quercetin concentration of 0.362㎎/l was obtained in 1.25㎎/l of the homogenate elicitor. Among the heavy metal salts tested, CuSO₄ showed a significant effect on quercetin accumulation, reaching to the concentration of 0.526 ㎎/l. Quercetin concentration increased to a maximum of l2-fold in response to CuSO₄ treatment as compared to that of untreated cells. The phenylalanine ammonia-lyase (PAL) activity and flavonol glycosides production simultaneously increased for 5 days of culture after fungal elicitor feeding, and their contents showed the same proportional patterns during the culture period. In contrast, PAL activity of cell cultures treated with CuSO₄ was almost constant during the culture period, although quercetin production increased remarkably.

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References

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