Abstract
Withania somnifera (L.) Dunal, is an important medicinal plant being the source of extremely important compounds like withanolides and withaferin. Influence of different plant growth regulators (PGRs) were evaluated for induction of callus, callus mediated regeneration and production of secondary metabolites in them. Explants for callusing were collected from plants grown in vitro and maximum callusing (98 %) was obtained on MS medium supplemented with a combination of 2,4-dichlorophenoxy acetic acid (2,4-D) (0.5 mg l-1) and kinetin (KN) (0.2 mg l−1). Among different types of calli, best shoot regeneration was observed on green, compact calli produced on MS medium with a combination of 6-benzylamino purine (BAP) and indole butyric acid (IBA). MS medium supplemented with BAP (2 mg l−1) showed highest frequency (98 %) of shoot bud regeneration. The micro-shoots were efficiently rooted on MS media supplemented with 0.5 mg l−1 IBA. Rooted plants were transferred to soil-vermi-compost (1:3; w/w) medium in greenhouse for acclimatization. Presence of withanolide A and withaferin A in calli was validated through high performance thin layer chromatography (HPTLC). It was interesting to observe that the PGRs showed significant influence on the secondary metabolites production in callus and 2,4-D having the least effect. Histological studies revealed the origin of shoot tip in the callus during regeneration.
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Abbreviations
- PGR:
-
Plant Growth Regulator
- MS:
-
Murashige and Skoog (1962) medium
- GA3 :
-
Gibberelic Acid A3
- 2,4-D:
-
2,4-dichlorophenoxy Acetic Acid
- KN:
-
kinetin
- BAP:
-
6-benzylamino Purine
- IBA:
-
indole-3-butyric Acid
- HPTLC:
-
High Performance Thin Layer Chromatography
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Acknowledgements
The authors are indebted to Dr. Chhanda Mondal, Ramakrishna Mission Quality Testing Laboretory, Narendrapur, Kolkata for chemical analysis of the samples.
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Chakraborty, N., Banerjee, D., Ghosh, M. et al. Influence of plant growth regulators on callus mediated regeneration and secondary metabolites synthesis in Withania somnifera (L.) Dunal. Physiol Mol Biol Plants 19, 117–125 (2013). https://doi.org/10.1007/s12298-012-0146-2
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DOI: https://doi.org/10.1007/s12298-012-0146-2