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Efficient plant regeneration from protoplasts isolated from embryogenic suspension cultures of Cyclamen persicum Mill.

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Abstract

A protocol for plant regeneration from protoplasts has been developed, and then successfully applied to different genotypes of Cyclamen persicum Mill. Protoplasts were isolated from embryogenic suspension cultures by enzymatic digestion in 2% cellulase R10 and 0.5% macerozyme R10. Yields obtained varied between 1 and 5 × 105 protoplasts per gram fresh mass depending on the genotype. Protoplasts were immobilized in alginate films, which promoted proper cell wall regeneration. The highest cell division frequencies were found in modified Kao and Michayluk (1975, Planta 126:105–110) medium containing the same types and concentrations of plant growth regulators that were applied for suspension culture (2.0 mg l−1 2,4-dichlorophenoxyacetic acid and 0.8 mg l−1 6-(γ,γ-dimethylallylamino)purine). Cell division was recorded for all 11 tested genotypes in frequencies of up to 12% and 18% after 7 and 14 days, respectively. However, cell division frequency varied strongly between different genotypes. After 4–6 weeks calluses were released from the alginate films and further cultured on hormone-containing medium for continued growth or transferred to hormone-free medium for regeneration of somatic embryos. Plant regeneration via somatic embryogenesis succeeded in 9 out of the 11 genotypes under investigation. Up to now protoplast-derived plants from four genotypes have been successfully transferred to soil.

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Abbreviations

2,4-D:

2,4-Dichlorophenoxyacetic acid

2iP:

6-(γ,γ-Dimethylallylamino)purine

BA:

6-Benzylaminopurine

NAA:

α-Naphthalene acetic acid

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Acknowledgements

The authors thank Wiltrud von Oertzen for her excellent technical assistance and Anika Brünig for critically reading the manuscript.

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Authors and Affiliations

  1. Floriculture Section, Institute of Floriculture and Woody Plant Science, University of Hannover, Herrenhaeuser Str. 2, D-30419, Hannover, Germany

    Traud Winkelmann, Janine Specht & Margrethe Serek

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  1. Traud Winkelmann
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  2. Janine Specht
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  3. Margrethe Serek
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Correspondence to Traud Winkelmann.

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Winkelmann, T., Specht, J. & Serek, M. Efficient plant regeneration from protoplasts isolated from embryogenic suspension cultures of Cyclamen persicum Mill.. Plant Cell Tiss Organ Cult 86, 337–347 (2006). https://doi.org/10.1007/s11240-006-9129-8

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  • DOI: https://doi.org/10.1007/s11240-006-9129-8

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