Abstract
We have explored the transient over-expression of Arabidopsis thaliana ascorbate peroxidase 3 (APX3) in Nicotiana benthamiana using a viral vector based on the potato virus X (PVX). Plants infected with a PVX:APX3 hybrid had a similar progression of viral particles compared to control plants infected with a PVX:GFP hybrid, indicating that infection was not affected by the over-expression of heterologous APX3. Our results also showed that in PVX:APX3-infected plants, the hybrid virus directed a high level of APX3 expression and the recombinant protein was functional, as inferred from the higher APX activity compared to mock and PVX:GFP hybrid-infected plants. The PVX recombinant expression system used is a simple and quick method for transient expression of heterologous APXs, which are expected to suffer specific processing in plant cells.
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Acknowledgements
We are very grateful to Dr Trelease and Dr Dalton for providing the primary immunoserum anti- glyoxysomal/peroxisomal cucumber APX and anti-cytosolic soybean APXs, respectively. We also thank Dr D. Baulcome for providing the pC2C2S vector and for technical advice.
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Escobar, C., Hernández, L.E., Jiménez, A. et al. Transient expression of Arabidopsis thaliana ascorbate peroxidase 3 in Nicotiana benthamiana plants infected with recombinant potato virus X. Plant Cell Rep 21, 699–704 (2003). https://doi.org/10.1007/s00299-002-0570-9
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DOI: https://doi.org/10.1007/s00299-002-0570-9