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Asymbiotic germination and seedling growth of Calanthe striata f. sieboldii Decne. ex Regel
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  • Journal title : Journal of Plant Biotechnology
  • Volume 42, Issue 3,  2015, pp.239-244
  • Publisher : The Korean Society of Plant Biotechnology
  • DOI : 10.5010/JPB.2015.42.3.239
 Title & Authors
Asymbiotic germination and seedling growth of Calanthe striata f. sieboldii Decne. ex Regel
Bae, Kee Hwa; Kim, Soo-Young;
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Calanthe striata f. sieboldii Decne. ex Regel is a terrestrial orchid with beautiful flowers arranged in racemose inflorescences. This species is threatened due to over-collection and loss of suitable habitats. Asymbiotic germination is useful in the conservation efforts to re-establish plants in the wild, and for commercial propagation. In this study, we investigate the effects of sodium hypochlorite (NaOCl), three types of culture media (Phytomax Orchid Maintenance - POM, Seed Germination Maintenance - SGM, and Murashige and Skoog 1962 - MS), and plant growth regulators on embryo swelling, protocorm formation, and embryo diameter of C. striata f. sieboldii. Treatment with 1% NaOCl for 30 min greatly enhanced embryo swelling (28.3%), embryo diameter (), and embryo protocorm formation (54.8%) compared to seeds without NaOCl treatment (embryo swelling 8.5%, embryo diameter , and protocorm formation 13.4%) on POM medium. Protocorm formation on POM medium supplemented with 1.0 mg/L N6-benzyladenine (BA) (95.6%) was better than the control (54.5%). Additionally, the effects of activated charcoal (AC) and sucrose on seedling growth in in vitro culture were examined. The protocorm converted into healthy plants with well-developed shoot primordia on the POM medium with AC and sucrose. The most suitable conditions for seedling growth after 10 weeks of culture were the POM medium with AC or sucrose. These results show effective asymbiotic seed germination and in vitro seedling growth of C. striata f. sieboldii.
Activated charcoal;in vitro;Medium;Sodium hyporchlorite;Sucrose;
 Cited by
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