Biotechnology and Bioprocess Engineering:BBE

The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Comparative Evaluation of Modified Bioreactors for Enhancement of Growth and Secondary Metabolite Biosynthesis Using Panax ginseng Hairy Roots

  • Jeong, Gwi-Taek (Engineering Research Institute, Chonnam National University) ;
  • Park, Don-Hee (School of Biological Sciences and Technology, Chonnam National University)
  • Published : 2005.12.31
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Abstract

Hairy root cultures have demonstrated great promise in terms of their biosynthetic capability toward the production of secondary metabolites, but continue to constitute a major challenge with regard to large-scale cultures. In order to assess the possibility of conducting mass production of biomass, and the extraction of useful metabolites from Panax ginseng. P. ginseng hairy roots, transformed by Rhizobium rhizogenes KCTC 2744, were used in bioreactors of different types and sizes. The most effective mass production of hairy roots was achieved in several differently Sized air bubble bioreactors compared to all other bioreactor types. Hairy root growth was enhanced by aeration, and the production increased with increasing aeration rate in a 1 L bioreactor culture. It was determined that the hairy root growth rate could be substantially enhanced by increases in the aeration rate upto 0.5vvm, but at aeration rates above 0.5vvm, only slight promotions in growth rates were observed. In 20 L air bubble bioreactors, with a variety of inoculum sizes, the hairy roots exhibited the most robust growth rates with an inoculum size of 0.1% (w/v), within the range 0.1 to 0.7% (w/v). The specific growth rates of the hairy root decreased with increases in the inoculum size.

Keywords

References

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