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Callus induction and plantlet regeneration in Withania somnifera (L.) dunal

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Summary

Callus induction was observed from hypocotyl, root, and cotyledonary leaf segments, grown on Murashige and Skoog (MS) medium supplemented with various concentrations and combinations of 2,4-dichlorophenoxyacetic acid (2,4-D) and kinetin (KN). Maximum callusing (100%) was obtained from root and cotyledonary leaf segments grown on MS medium supplemented with a combination of 2 mg l−1 (9.1 μM) 2,4-D and 0.2 mg l−1 (0.9 μM) KN. The calluses, when subcultured in the same medium, showed profuse callusing. However, these calluses remained recalcitrant to regenerate regardless of the quality and combinations of plant growth regulators in the nutrient pool. When hypocotyl segments were used as explants, callus induction was noticed in 91% of cultures which showed shoot regeneration on MS medium supplemented with 2 mg l−1 2,4-D and 0.2 mg l−1 KN. These shoots were transferred to fresh medium containing various concentrations and combinations of 6-benzyladenine (BA) and N6-(2-isopentenyl)adenosine (2-iP). Maximum shoot multiplication was observed after 60 d of the second subculture on MS medium containing 2 mg l−1 (8.9 μM) BA. These shoots were rooted best (87%) on MS medium containing 2 mg l−1 (9.9 μM) indole-3-butyric acid (IBA). The plantlets were transferred to the field after acclimatization and showed 60% survival.

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Correspondence to Avinash Nagpal.

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Rani, G., Virk, G.S. & Nagpal, A. Callus induction and plantlet regeneration in Withania somnifera (L.) dunal. In Vitro Cell.Dev.Biol.-Plant 39, 468–474 (2003). https://doi.org/10.1079/IVP2003449

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  • DOI: https://doi.org/10.1079/IVP2003449

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