Callus induction and adventitious bud differentiation of Cyclocodon lancifolius (Roxb.) Kurz
Background: Cyclocodon lancifolius (Roxb.) Kurz is a perennial medicinal and edible plant with a huge potential economic value. The wild resources of this plant are gradually scarce by the serious destruction of the habitat and the limitations of sexual reproduction. This is the first attempt to establish an in vitro reproductive system for the species.
Hypothesis: The suitable plant regulator types and its mass concentration range, combined with the explants, can induce the development of plants at various stages. We expected to establish an in vitro regeneration system of C. lancifolius based on these factors.
Species studied: Cyclocodon lancifolius
Study site and years of study: Yunnan Breeding and Cultivation Research and Development Center of Endangered and Daodi Chinese Medicinal Materials, Yunnan University of Chinese Medicine, from 2017 to 2019.
Methods: The plant regeneration of C. lancifolius was established by single factor, L9 (34) orthogonal and complete combination experiments.
Results: Stem segments were the best explants for callus induction on MS medium containing 0.05 mg·L-1 KT, 0.5 mg·L-1 6-BA and 0.5 mg·L-1 NAA. MS medium with 0.2 mg·L-1 TDZ and MS medium were used alternately as the culture method to conduct differentiation and proliferation of adventitious shoot. The optimal protocol for the rooting was MS medium combined with 0.1 mg·L-1 6-BA and 1.0 mg·L-1 NAA.
Conclusions: A rapid propagation system of C. lancifolius was established which provided a possible solution for the protection of wild resources and artificial cultivation.
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