Abstract
In some RNA viruses (e.g. in brome mosaic virus, BMV), the same factor (intra- or intermolecular hybridization between viral RNA molecules) is capable of inducing two different processes: RNA silencing and RNA recombination. To determine whether there is some interplay between these two phenomena, we have examined if the BMV-based recombination vector containing a plant-genome-derived sequence can function as a gene-silencing vector. Surprisingly, we found that neither dsRNA forming during the replication of the BMV-based vector nor highly structured regions of its genome were effective RNAi triggers. Only mutants carrying a sequence complementary to the target mRNA functioned as gene silencing vectors and were steadily maintained in the infected plant. The constructs containing a sense sequence or inverted repeats did not induce gene silencing but instead were eliminated from the plant cells.
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Acknowledgments
This study was supported by the Polish Government through grant 6PO5A 054 21 from the State Committee for Scientific Research (KBN) awarded to MF grant PBZ-MNiSW-2/3/2006 to AP, AJ and ZSK. MF was additionally funded by grant CRP/POL03-02 from the International Center for Genetic Engineering and Biotechnology, and MBP by a Marie Curie Training PhD Fellowship Site in Plant Virology to the Scottish Crop Research Institute (contract number QLK3-CT-2001-60032). AP has been supported by the Foundation for Polish Science.
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Pacak, A., Strozycki, P.M., Barciszewska-Pacak, M. et al. The brome mosaic virus-based recombination vector triggers a limited gene silencing response depending on the orientation of the inserted sequence. Arch Virol 155, 169–179 (2010). https://doi.org/10.1007/s00705-009-0556-9
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DOI: https://doi.org/10.1007/s00705-009-0556-9