Abstract
An in vitro process for rapid clonal propagation of Clerodendrum serratum (Linn.) Moon, a rare and threatened medicinal shrub, has been developed. Nodal stem segments having axillary bud, taken from field-grown plant, showed bud-break within 15 days of culture on modified Murashige and Skoog (MS) (Physiol Plant 15:473–497, 1962) medium supplemented with 0.25 mg/l each of 6-benzylaminopurine and indole-3-acetic acid along with 15 mg/l adenine sulphate (AdS). Regenerated shoots could be further multiplied on the same agarified morphogenetic medium in presence of 0.5 mg/l 2-chloroethyltrimethyl ammonium chloride with increased concentration of AdS, i.e., 30 mg/l. A group of five shoots used as inoculum produced on an average 4.98 new shoots per original shoot after 4 weeks of subculture. Shoots excised from cultures of proliferating shoots were rooted in half-strength MS medium having 1 mg/l indole-3-propionic acid. In vitro rooted shoots—plantlets—grew luxuriantly under field conditions and came to flowering after 10 months of transplantation. The genetic fidelity of in vitro-raised field-grown plants and their mother plant was ascertained by random amplified polymorphic DNA markers. The protocol developed holds good for in vitro cloning of C. serratum.

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- AdS:
-
Adenine sulphate
- BAP:
-
6-Benzylaminopurine
- CCC:
-
2-Chloroethyltrimethyl ammonium chloride
- IAA:
-
Indole-3-acetic acid
- IBA:
-
Indole-3-butyric acid
- IPA:
-
Indole-3-propionic acid
- MS medium:
-
Murashige and Skoog (1962) medium
- NAA:
-
α-Naphthaleneacetic acid
- NOA:
-
α-Naphthoxyacetic acid
- RAPD:
-
Random amplified polymorphic DNA
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Acknowledgments
The authors express gratitude to The Director, National Botanical Research Institute, Lucknow, for the facilities provided and Botanic Garden Conservation International, UK, for partial financial support. Thanks are also due to Dr. R. L. S. Sikarwar, Senior Research Officer, Deendayal Research Institute, Chitrakoot, for providing the plant material.
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Communicated by E. Lojkowska.
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Sharma, M., Rai, S.K., Purshottam, D.K. et al. In vitro clonal propagation of Clerodendrum serratum (Linn.) Moon (barangi): a rare and threatened medicinal plant. Acta Physiol Plant 31, 379–383 (2009). https://doi.org/10.1007/s11738-008-0245-4
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DOI: https://doi.org/10.1007/s11738-008-0245-4

