Abstract.
Protoplasts of the pathogenic plant fungus, Crinipellis perniciosa, were transformed to hygromycin B resistance using the pAN7-1 plasmid, which contains the Escherichia coli hph gene under the control of Aspergillus nidulans regulatory sequences. The pAN7-1 plasmid was introduced by PEG/CaCl2 treatment. Transformation frequencies of 1.6–2.5 transformants/μg of DNA were achieved. About 54% of the transformants were abortive and 40 analyzed transformants were mitotically stable and showed different hygromycin B resistance levels. The presence of the hph gene was checked by PCR in five transformants and the integration of multiple plasmid copies into different genome sites was observed by Southern analysis. This is the first report of a C. perniciosa transformation system and represents an important step for further research into genetic manipulation of this fungal plant pathogen.
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Acknowledgements
We thank the Brazilian agencies CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) and CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) for financial support. We are grateful to Dr. C.A.M.J.J. van den Hondel for the pAN7-1 plasmid.
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Communicated by U. Kück
An erratum to this article is available at http://dx.doi.org/10.1007/s00294-003-0388-1.
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Lima, J.O., dos Santos, J.K., Pereira, J.F. et al. Development of a transformation system for Crinipellis perniciosa, the causal agent of witches' broom in cocoa plants. Curr Genet 42, 236–240 (2003). https://doi.org/10.1007/s00294-002-0358-z
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DOI: https://doi.org/10.1007/s00294-002-0358-z