Abstract
Effect of nitrogen and carbon sources on multiple shoot regeneration and withanolides contents of Withania somnifera were evaluated. Inclusion of l-glutamine (20 mg/l) in medium fortified with the optimal levels of 1.5 mg/l 6-benzyladenine (BA) and 0.3 mg/l indole-3-acetic acid (IAA) resulted in the production of 58 shoots/explant. Sucrose at 4 % and 20 mg/l l-glutamine with idéal concentrations of BA and IAA improved shoot multiplication (62 shoots/explant) while 6 % sucrose enhanced withanolides contents in regenerated multiple shoots. All the shoots were rooted (26 roots/shoot) when cultured in MS medium amended with 15 mg/l ammonium nitrate, 2 mg/l IBA, and 2 % sucrose. The present study resulted in the production of 4.42-fold higher multiple shoots and 2.6-fold higher roots as well as enhancing the contents of all major withanolides (withaferin A, withanone, withanolide A and B) in regenerated plants when compared to previous reports on W. somnifera regeneration.
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Abbreviations
- 2,4-D:
-
2,4-Dichlorophenoxy acetic acid
- BA:
-
6-Benzyladenine
- DW:
-
Dry weight
- HPLC:
-
High performance liquid chromatography
- IAA:
-
Indole-3-acetic acid
- IBA:
-
Indole-3-butyric acid
- KN:
-
Kinetin
- MS:
-
Murashige and Skoog
- NN:
-
Nitsch and Nitsch
- PGRs:
-
Plant growth regulators
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Acknowledgments
Prof. A. Ganapathi is thankful to University Grants Commissions (UGC), Government of India, for the award of UGC-BSR (Basic Scientific Research Fellowship). The first author gratefully acknowledges the Council of Scientific and Industrial Research (CSIR), Government of India, for the award of CSIR-SRF. The authors are thankful to Dr. R. Boopathy, Head of the Department and Dr. S. Girija, Associate Professor, Department of Biotechnology, Bharathiar University, Coimbatore for providing HPLC facility.
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Communicated by K.Y. Paek.
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Sivanandhan, G., Selvaraj, N., Ganapathi, A. et al. Effect of nitrogen and carbon sources on in vitro shoot multiplication, root induction and withanolides content in Withania somnifera (L.) Dunal. Acta Physiol Plant 37, 12 (2015). https://doi.org/10.1007/s11738-014-1758-7
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DOI: https://doi.org/10.1007/s11738-014-1758-7