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Enhancement of transformation rates in higher plants by low-dose irradiation: Are DNA repair systems involved in the incorporation of exogenous DNA into the plant genome?

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Abstract

Irradiation (X-ray; 5–15 Gy) of protoplasts treated with plasmid-DNA and PEG yielded higher transformation rates in comparison to non-irradiated protoplasts transformed by the same method. This could be demonstrated for four plant species. The irradiation doses used did not affect the total number of colonies regenerated without selection pressure, but resulted in 3–6-fold enhancement of hygromycin- or kanamycin-resistant colonies. Plant regeneration frequencies of transformed colonies derived from irradiated and non-irradiated protoplasts were similar in tobacco as well as in Petunia. Higher integration rates of foreign DNA as a consequence of an increased recombination machinery in irradiated cells may be responsible for the enhancement of the number of stably transformed colonies.

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Author notes

  1. F. Köhler, G. Cardon & R. Gill

    Present address: Institut für Angewandte Genetik, Freie Universität Berlin, Albrecht-Thaer-Weg 6, 1000, Berlin 33, FRG

Authors and Affiliations

  1. Max-Planck-Institut für Züchtungsforschung, 5000, Köln-Vogelsang, FRG

    F. Köhler, G. Cardon, M. Pöhlman, R. Gill & O. Schieder

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  1. F. Köhler
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  3. M. Pöhlman
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Köhler, F., Cardon, G., Pöhlman, M. et al. Enhancement of transformation rates in higher plants by low-dose irradiation: Are DNA repair systems involved in the incorporation of exogenous DNA into the plant genome?. Plant Mol Biol 12, 189–199 (1989). https://doi.org/10.1007/BF00020504

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  • DOI: https://doi.org/10.1007/BF00020504

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