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Effect of repeated DNA sequences on direct gene transfer in protoplasts of Nicotiana plumbaginifolia

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Summary

Highly repeated nuclear DNA sequences from leaves of Nicotiana plumbaginifolia were cloned in pBR322 and tested for their effect on direct gene transfer in protoplasts of the same organism. Protoplasts were prepared from suspension cultures and were incubated in the presence of the plasmid pHP23 carrying the kanamycin resistance gene APH(3′)II and in the presence of the plasmids carrying the cloned sequence. DNA uptake was induced by a polyethyleneglycol (PEG) treatment. Out of the 22 tested clones, 3 significantly stimulated the frequency of appearance of transformed colonies. DNA was extracted from some of the kanamycin-resistant calli obtained by co-transformations. Dot-blots have shown that the stimulatory effect on transformation frequency is often accompanied by a consistent increase in integrated genes sequences.

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Authors and Affiliations

  1. Department of Genetics and Microbiology, University of Pavia, Via S. Epifanio 14, I-27100, Pavia, Italy

    M. L. Marchesi, S. Castiglione & F. Sala

  2. Institute of Botany, University of Parma, Italy

    F. Sala

Authors
  1. M. L. Marchesi
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  2. S. Castiglione
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  3. F. Sala
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Communicated by F. Salamini

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Marchesi, M.L., Castiglione, S. & Sala, F. Effect of repeated DNA sequences on direct gene transfer in protoplasts of Nicotiana plumbaginifolia . Theoret. Appl. Genetics 78, 113–118 (1989). https://doi.org/10.1007/BF00299763

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  • DOI: https://doi.org/10.1007/BF00299763

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