Abstract
Ranunculus wallichianus is a rare medicinal plant endemic to Western Ghats, India. Nodal explants were inoculated on MS medium with 1.0 to 5.0 mg L−1 of 6-benzyladenine (BA), kinetin (KIN), or thidiazuron (TDZ) resulting in a low percentage of shoot regeneration. Coconut water (CW) was added to MS medium containing the above mentioned cytokinins to promote in vitro plantlet growth. Multiple shoots were regenerated on half-strength Murashige and Skoog (MS) medium containing 1.0 to 5.0 mg L−1 BA, KIN, or TDZ in combination with 5%, 10%, and 20% CW. The highest percentage of shoot multiplication was observed from cultures incubated on half-strength MS medium supplemented with 3.0 mg L−1 TDZ in combination with 10% CW. The cut ends of well-elongated shoots were transferred to medium containing 0.5 to 3.0 mg L−1 indole-3-acetic acid (IAA) or indole-3-butyric acid (IBA) to induce in vitro root induction. Half-strength MS medium with 2.5 mg L−1 IBA and 250 mg L−1 activated charcoal shows high frequency of root formation. The well-rooted plantlets were transferred to pots for hardening with survival rate of 93% after 30 d. The present work indicates the addition of CW with the cytokinins in half-strength MS medium is suitable for rapid micropropagation of R. wallichianus.
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Authors gratefully acknowledge the management of St. Joseph’s college, Tiruchirappalli, India, for providing the laboratory facilities.
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The authors also acknowledge the University Grant Commission (UGC)–South Eastern Regional Office (SERO), Hyderabad (MRP-5973/15-UGC SERO), India, for financial support.
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PS and RT carry out the experiments and analyze the experimental data. PS prepared the manuscript. HDR gave the outline of the experimental design and edited the final version of the manuscript.
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Editor: Prakash Lakshmanan
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Srinivasan, P., Raja, H.D. & Tamilvanan, R. Effect of coconut water and cytokinins on rapid micropropagation of Ranunculus wallichianus Wight & Arnn—a rare and endemic medicinal plant of the Western Ghats, India. In Vitro Cell.Dev.Biol.-Plant 57, 365–371 (2021). https://doi.org/10.1007/s11627-020-10137-1
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DOI: https://doi.org/10.1007/s11627-020-10137-1