Folia Microbiologica

, Volume 64, Issue 1, pp 33–39 | Cite as

Electroporation of germinated conidia and young mycelium as an efficient transformation system for Acremonium chrysogenum

  • Jessica Cruz-Ramón
  • Francisco J. Fernández
  • Armando Mejía
  • Francisco FierroEmail author
Original Article


Three different transformation strategies were tested and compared in an attempt to facilitate and improve the genetic transformation of Acremonium chrysogenum, the exclusive producer of the pharmaceutically relevant β-lactam antibiotic cephalosporin C. We investigated the use of high-voltage electric pulse to transform germinated conidia and young mycelium and compared these procedures with traditional PEG-mediated protoplast transformation, using phleomycin resistance as selection marker in all cases. The effect of the field strength and capacitance on transformation frequency and cell viability was evaluated. The electroporation of germinated conidia and young mycelium was found to be appropriate for transforming A. chrysogenum with higher transformation efficiencies than those obtained with the conventional protoplast-based transformation procedures. The developed electroporation strategy is fast, simple to perform, and highly reproducible and avoids the use of chemicals toxic to cells. Electroporation of young mycelium represents an alternative method for transformation of fungal strains with reduced or no sporulation, as often occurs in laboratory-developed strains in the search for high-yielding mutants for industrial bioprocesses.


Funding information

This work was funded by the CONACyT (México) through the Research Project CB-2008-01 105527. Jessica Cruz-Ramón received a Scholarship Grant from the CONACyT (No. 203440).

Supplementary material

12223_2018_625_MOESM1_ESM.pdf (265 kb)
Table A1 (PDF 265 kb)
12223_2018_625_MOESM2_ESM.pdf (489 kb)
Table A2 (PDF 489 kb)


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Copyright information

© Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i. 2018

Authors and Affiliations

  1. 1.Departamento de BiotecnologíaUniversidad Autónoma Metropolitana-Unidad IztapalapaCiudad de MéxicoMexico

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