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- W2039294902 abstract "Transgenic hairy roots were induced from Withania somnifera Dunal, by infecting leaf explants with Agrobacterium rhizogenes. Polymerase chain reaction for rol A gene and Southern blot confirmed the integration of T-DNA in the genome. Cultures were grown in Murashige and Skoog solid as well as in liquid medium. The antioxidant activity was assayed in roots grown in solid media and liquid media. Hairy roots grown in liquid media found to possess highly significant activity in 1,1-diphenyl-2-pecryl-hydrazyl radical, beta-carotene linoleic acid model system. The activity was 57.34%, 75.64%, and 93.41% in case DPPH model and 55.3%, 76.3%, and 90.5% in case of b-CLAMS in 25, 50, and 100 mg L(-1) concentration, respectively. In case of hydroxyl radical trapping and brain lipid peroxidation assay, the activity was more significant in hairy roots grown on solid medium in comparison with commercial formulation prepared using normal roots and standard withanaloids. Root extract grown in solid medium has shown 93.2% hydroxyl radical trapping activity at 100 mg L(-1) concentration, and 500 mg L(-1) has shown 83.6% in case of brain lipid peroxidation assay. High-performance liquid chromatography analysis demonstrated the presence of withanaloids in the hairy root extracts. The results of the study clearly indicate that there is enhancement of secondary metabolites in hairy roots, which is indicated through significant enhancement of the antioxidant activity, since these are the major constituents responsible for the activity. This is the first report on the presence of antioxidant principles in genetically modified roots of W. somnifera. These results of the present study may aid in utilization of the W. somnifera hairy roots for its rejuvenating principles." @default.
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- W2039294902 date "2005-03-01" @default.
- W2039294902 modified "2023-09-27" @default.
- W2039294902 title "Genetically Modified Hairy Roots of<i>Withania somnifera</i>Dunal: A Potent Source of Rejuvenating Principles" @default.
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- W2039294902 doi "https://doi.org/10.1089/rej.2005.8.37" @default.
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