title: [Biotransformation of daphnetin by suspension transgenic hairy roots of Polygonum multiflorum].
abstract: OBJECTIVE
  To investigate the biotransformation of daphnetin by suspension transgenic hairy root of Polygonum multiflorum and provide a biotechnological method for large-scale production of the daphnetin-8-O-beta-D-glucoside using this new culture system.
  
  
  METHODS
  Daphnetin was added into the media of suspension to culture 36 h. The biotransformation product was detected with TLC and HPLC, and isolated by various chromatographic methods. The influence of co-cultured time on conversion ratio, content of degradation product and the reason for the degradation of product II were investigated using HPLC.
  
  
  RESULTS
  One biotransformation product, daphnetin-8-O-beta-D-glucoside, was obtained, the optimal co-cultured time in suspension hairy root of P. multiflorum was 36 h with the highest biotransformation molar ratio of 32.11%, the sucrose medium (sucrose-only) can increase the biotransformation molar ratio to 72.44%. The result demonstrated that the degradation products of the product II was induced by the MS medium.
  
  
  CONCLUSIONS
  The potential application of suspension transgenic hairy root of P. multflorum in the sucrose-only medium on generating daphnetin-8-Obeta-D- glucoside could be prospective.
authors.affiliation: College of Pharmacy, Jinan University, Guangzhou 510632, China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Deng
authors.forename: Liangbin
authors.initials: L
authors.lastname: Zhou
authors.forename: Rongmin
authors.initials: R
authors.lastname: Yu
mesh_terms: D001711:Biotransformation; D018920:Coculture Techniques; D005960:Glucosides / Q000378:metabolism; D018517:Plant Roots / Q000235:genetics / Q000378:metabolism*; D030821:Plants, Genetically Modified; D028502:Polygonum / Q000235:genetics / Q000378:metabolism*; D014468:Umbelliferones / Q000378:metabolism*
chemical_list: D005960:Glucosides; D014468:Umbelliferones; C039952:daphnetin