Journal
FEMS MICROBIOLOGY LETTERS
Volume 223, Issue 1, Pages 135-139Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-1097(03)00355-0
Keywords
Trichoderma; Penicillium; fungal transformation; reporter gene; fluorescent protein; green fluorescent protein; DsRed
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The recently reported red fluorescent protein DsRed from the reef coral Discosoma sp. represents a new marker that has been codon-optimized for high expression in mammalian cells, To facilitate expression of DsRed in ascomycete fungi, we used the clone pDsRed-Express (Clontech) for constructing a plasmid vector, pPgpd-DsRed, containing the constitutive Aspergillus nidulans glyceraldehyde 3-phosphate (gpd) promoter. This vector was used for co-transformation of Penicillium paxilli, Trichoderma harzianum and Trichoderma virens (syn. Gliocladium virens) together with either pAN7-1 or gGFP, both containing a gene for hygromycin resistance for transformant selection. In addition, gGFP contains a green fluorescent protein (GFP) gene for expression in Ascomycetes. Expression of DsRed-Express was obtained in all three fungi, indicating that DsRed can be used as a highly effective vital marker in Ascomycetes. Dual marked transformants expressed both DsRed-Express and GFP in the same mycelium and were used for non-quantitative comparison of the intensity of the fluorescence using confocal laser scanning microscopy. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
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