Abstract
An efficient protocol is described for rapid in vitro multiplication of the vulnerable medicinal herb Drosera indica L. by enhanced axillary bud proliferation from shoot tips as explants. In order to standardize in vitro multiplication of D. indica, the effects of different strengths of Murashige and Skoog (MS) medium (1/4, 1/3, 1/2 and full strength), different percentages of sucrose (1, 2 and 3%), various pH (3.7, 4.7, 5.7 and 6.7) and MS basal medium fortified with different concentrations of zeatin (Z), kinetin (KN) (0.1, 0.5, 1.0 and 2.0 mg/l) and 6-benzylaminopurine (BA) (0.01, 0.05 and 0.1 mg/l) were tried. Multiple shoot production was independent of different strengths of MS, various percentages of sucrose and also when pH was altered. Although the number of multiple shoots developed on MS medium supplemented with Z (0.1, 0.5, 1.0 and 2.0 mg/l), KN (0.5 and 1.0 mg/l) and BA (0.1 mg/l) separately was high, the maximum number was observed on MS fortified with Z (0.5 mg/l) and KN (0.5 mg/l), respectively, which clearly depicts that there is not much difference comparatively with a variation in hormone concentration in case of Z. High cytokinin concentrations resulted in retardation of shoot growth. Rooting was best achieved on MS basal medium. This protocol could be useful for production of large biomass within 6 weeks for plumbagin bioprospection and long term in vitro conservation.
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Financial support and infrastructural facilities by the Department of Biotechnology, Government of India, New Delhi (Ref: BT/PR 2273/PBD/ 17/117/2000 dt.7-9-01) are gratefully acknowledged.
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Jayaram, K., Prasad, M.N.V. Rapid in vitro multiplication of Drosera indica L.: a vulnerable, medicinally important insectivorous plant. Plant Biotechnol Rep 1, 79–84 (2007). https://doi.org/10.1007/s11816-007-0014-7
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DOI: https://doi.org/10.1007/s11816-007-0014-7