title: Growth kinetics and ginsenosides production in transformed hairy roots of American ginseng--Panax quinquefolium L.
abstract: A thin, profusely branched, fast growing hairy root line of Panax quinquefolium (American ginseng) was established by co-culturing epicotyl explants with a wild type strain of Agrobacterium rhizogenes. The transformed roots grew by over 10-fold from the initial inoculum within 8 weeks. The crude ginsenosides content in the roots was about 0.2 g/g dry wt level up to the 10th week of culture. Ginsenosides Rb2, Rd, Re, Rf and Rg1 constituted 47-49% of the crude saponin fraction between 6 and 8 weeks of growth whereas, Rc ginsenoside was accumulated only after 9th weeks when the biomass started receding. PCR amplification analysis of the hairy roots confirmed their transgenic nature by showing the presence of Ri-TL DNA with rolA, rolB and rolC genes in their genome.
authors.affiliation: Plant Tissue Culture Laboratory, Division of Biotechnology, Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Lucknow, 226015, India.
authors.forename: Archana
authors.initials: A
authors.lastname: Mathur
authors.forename: Anita
authors.initials: A
authors.lastname: Gangwar
authors.forename: Ajay K
authors.initials: AK
authors.lastname: Mathur
authors.forename: Priyanka
authors.initials: P
authors.lastname: Verma
authors.forename: Girish C
authors.initials: GC
authors.lastname: Uniyal
authors.forename: Raj K
authors.initials: RK
authors.lastname: Lal
mesh_terms: D000704:Analysis of Variance; D036145:Ginsenosides / Q000096:biosynthesis*; D007700:Kinetics; D005894:Panax / Q000235:genetics* / Q000254:growth & development*; D018517:Plant Roots / Q000235:genetics* / Q000254:growth & development*; D030821:Plants, Genetically Modified; D016133:Polymerase Chain Reaction; D014170:Transformation, Genetic
chemical_list: D036145:Ginsenosides