In vitro micropropagation and flowering in Ipomoea sepiaria Roxb. An important ethanomedicinal plant

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Objective: To standardize a protocol for the micropropagation and in vitro flowering of Ipomoea sepiaria(I. sepiaria), an important ethanomedicinal plant. Methods: The nodal cuttings were cultured on Murashige and Skoog (MS) medium supplemented with various concentrations of 6-benzyladenine (BA) or Kinetin (Kn; 1.0-4.0 mg/L) alone or in combination withα-naphthaleneacetic acid (NAA; 0.2-1.0 mg/L) for shoot proliferation. For rooting ? MS medium supplemented with indole-3-butyric acid (IBA) or NAA (0.5-3.0 mg/L) was used. When the 45-day-old in vitro derived nodal cuttings were subcultured on MS medium supplemented with 3.0 mg/L BA and 0.5 mg/L NAA and various concentrations of abscisic acid (ABA; 0.5-3.0 mg/L), in vitro flowering was observed. Results:The highest shoot induction response in terms of percent cultures responding and number of shoots per explant was observed on 3.0 mg/L BA and 0.5 mg/L NAA. On this medium 100%cultures responded with an average number of 3.2 shoots per explant. The optimum rooting was observed on 2.0 mg/L IBA. Here 100%shoots rooted with an average number of 5.1 roots per shoot. The optimum in vitro flowering response (38%) was observed on 2.0 mg/L ABA. Conclusion:The present protocol is an efficient method for the rapid multiplication, flowering and conservation of this medicinal plant.
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