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Cryopreservation of embryogenic cultures of Scots pine

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Abstract

The aim of the study was to develop an effective cryopreservation method for Scots pine (Pinus sylvestris L.) embryogenic cultures. Altogether nine cell lines derived from three mother trees were cryopreserved after cold hardening using dimethylsulfoxide or two different mixtures of polyethyleneglycol 6000, glucose and dimethylsulfoxide as cryoprotectants. Seventy-eight percent of the cell lines remained viable after cryostorage, the best cryoprotectant treatment being 10% polyethyleneglycol 6000, 10% glucose, and 10% dimethylsulfoxide in water. This treatment resulted in significantly better regrowth of the embryogenic cultures than with the other cryoprotectants or with the controls. According to microscopical observations, the cells that retained their viability and regrowth ability after cryopreservation were the embryonal head cells, as well as some elliptic suspensor cells close to the embryonal head cell area. When proliferation growth of the frozen cultures had started, their morphological appearance was the same as the non-frozen cultures. In addition, the RAPD assays suggested that the cryostorage treatment used here preserved the genetic fidelity of the Scots pine embryogenic cultures.

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Authors and Affiliations

  1. The Finnish Forest Research Institute, Punkaharju Research Station, FIN-58450, Punkaharju, Finland

    Hely M. Häggman, Leena A. Ryynänen & Tuija S. Aronen

  2. Department of Forest Genetics and Tree Breeding, Forest Research Institute, T.G. Masaryka 22, SK-96022, Zvolen, Slovak Republik

    Jana Krajnakova

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  1. Hely M. Häggman
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  2. Leena A. Ryynänen
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  3. Tuija S. Aronen
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  4. Jana Krajnakova
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Häggman, H.M., Ryynänen, L.A., Aronen, T.S. et al. Cryopreservation of embryogenic cultures of Scots pine. Plant Cell, Tissue and Organ Culture 54, 45–53 (1998). https://doi.org/10.1023/A:1006104325426

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