Abstract
Transgenic plums containing the plum pox potyvirus coat protein (PPV-CP) gene were inoculated with PPV. Infection was monitored by evaluating symptoms, ELISA, and IC-RT-PCR. Transgenic clone C5 was highly resistant to PPV during four years of testing and displayed characteristics typical of post-transcriptional gene silencing (PTGS), including a high level of transgene transcription in the nucleus, low levels of transgene mRNA in the cytoplasm, a complex multicopy transgene insertion with aberrant copies, and methylation of the silenced PPV-CP transgene. The PPV-CP transgene was also methylated in seedlings of C5 and these seedlings were resistant to PPV. Our results show, for the first time, that PTGS functions as a mechanism for virus resistance in a woody perennial species.
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Adams AN and Patterson VSA (1980) Plum pox virus. East Malling Research Station Report for 1979: 104.
Adams AN, Guise CM and Crossley SJ (1998) Detection of plum pox virus in root and bark samples from dormant plum trees. Acta Hort 472: 469–474.
Balandin T and Castresana C (1997) Silencing of a ß -1,3-glucanase transgene is overcome during seed formation. Plant Mol Biol 34: 125–137.
Baulcombe DC (1996) Mechanisms of pathogen-derived resistance to viruses in transgenic plants. Plant Cell 8 1833–1844.
Beachy RN, Loesch-Fries S and Tumer NE (1990) Coat proteinmediated resistance against virus infection. Ann Rev Phytopathol 28: 451–474.
Carrington JC and Whitham SA (1998) Viral invasion and host defense: strategies and counter strategies. Current Opinions Plant Biol 1: 336–341.
Damsteegt VD, Waterworth HE, Mink GI, Howell WE and Levy L (1997) Prunus tomentosa as a diagnostic host for detection of plum pox virus and other Prunus viruses. Plant Dis 81: 329–332.
Davies GJ, Sheikh MA, Ratcliff OJ, Coupland G and Furner IJ (1997) Genetics of homology-dependent gene silencing in Arabidopsis; a role for methylation. Plant J 12: 791–804.
Dehio C and Schell J (1994) Identification of plant genetic loci involved in posttranscriptional mechanism for meiotically reversible transgene silencing. Proc Natl Acad Sci USA 91: 5538–5542.
Depicker A and Van Montagu M (1997) Post-transcriptional gene silencing in plants. Curr Opin Cell Biol 9: 373–382.
Dougherty WG and Parks TD (1995) Transgenes and gene suppression: Telling us something new? Curr Opin Cell Biol 7: 399–405.
English JJ, Mueller E and Baulcomb DC (1996) Suppression of virus accumulation in transgenic plants exhibiting silencing of nuclear genes. Plant Cell 8: 179–188.
Fitch MMM, Manshardt RM, Gonsalves D, Slightom JL and Sanford JC (1990) Stable transformation of papaya via microprojectile bombardment. Plant Cell Repts 9: 189–194.
Guo HS, Lopez-Moya JJ and Garcia JA (1999) Mitotic stability of infection-induced resistance to plum pox potyvirus associated with transgene silencing and DNA methylation. MPMI 12: 103–111.
Ingelbrecht IL, Van Houdt H, Van Montagu M and Depicker A (1994) Post-transcriptional silencing of reporter transgenes in tobacco correlates with DNA methylation. Proc Natl Acad Sci USA 91: 10502–10506.
Jones L, Hamilton AJ, Voinnet O, Thomas CL, Maule AJ and Baulcombe DC (1999) RNA-DNA interactions and DNA methylation in post-transcriptional gene silencing. Plant Cell 11: 2291–2301.
Kobayashi N, Horikoshi T, Katsuyama H, Handa T and Takayanagi K (1998) A simple and efficient DNA extraction method for plants, especially woody plants. Plant Tissue Culture and Biotech 4(2) 76–80.
Kohli A, Gahakawa D, Vain P, Laurie DA and Christou P (1999) Transgene expression in rice engineered through particle bombardment: molecular factors controlling stable expression and transgene silencing. Planta 208: 88–97.
Kunz C, Hanspeter S, Stam M, Kooter JM and Meins F Jr. (1996) Developmentally regulated silencing and reactivation of tobacco chitinase transgene expression. Plant J 10: 437–450.
Levy L and Hadidi A (1994) A simple and rapid method for processing tissue infected with plum pox potyvirus for use with specific 3′ non-coding RT-PCR assays. OEPP/EPPO Bull 24: 595–604.
Ling KS, Namba S, Gonsalves C, Slightom JL and Gonsalves D (1991) Protection against detrimental effects of potyvirus infection in transgenic tobacco plants expressing the papaya ringspot virus coat protein gene. Bio/Technology 9: 752–758.
Malinowski T, Zawadzka B, Ravelonandro M and Scorza R (1998) Preliminary report on the apparent breaking of resistance of a transgenic plum by chip bud inoculation of plum pox virus PPVS. Acta Virol 42: 241–243.
Maniatis T, Fritsch EF and Sambrook J (1982) Molecular cloning: A Laboratory Manual. Cold Springs Harbor Laboratory, NY.
Nemeth M (1994) History and importance of plum pox in stone-fruit production. EPPO Bul 24: 525–536.
Palauqui JC, Elmayan T, Pollien JM and Vaucheret J (1997) Systemic acquired silencing: transgene-specific post-transcriptional silencing is transmitted by grafting from silenced stocks to non-silenced scions. EMBO J 16: 4738–4745.
Palauqui JC and Vaucheret V (1998) Transgenes are dispensable for the RNA degradation step of cosuppression. Proc Natl Acad Sci USA 95: 9675–9680.
Pang SZ, Jan FJ, Carney K, Stiout J, Tricoli DM, Quemada HD et al. (1996) Post-transcriptional transgene silencing and consequent tospovirus resistance in transgenic lettuce are affected by transgene dosage and plant development. Plant J 9: 899–909.
Ravelonandro M, Monsion M, Teycheney PY, Delbos R and Dunez J (1992) Construction of a chimeric viral gene expressing plum pox coat protein. Gene 120: 167–173.
Ravelonandro M, Scorza R, Bachelier JC, Labonne G, Levy L, Damsteegt V et al. (1997) Resistance of transgenic Prunus domestica to plum pox virus infection. Plant Dis 81: 1231–1235.
Saxena PK, Fowke LC and King J (1985) An efficient procedure for isolation of nuclei from plant protoplasts. Protoplasma 128: 184–189.
Scorza R, Ravelonandro M, Callahan AM, Cordts JM, Fuchs M, Dunez J et al. (1994) Transgenic plums (Prunus domestica L.) express the plum pox virus coat protein gene. Plant Cell Repts 14: 18–22.
Scorza R, Levy L, Damsteegt V, Yepes LM, Cordts J, Hadidi A et al. (1995) Transformation of plum with the papaya ringspot virus coat protein gene and reaction of transgenic plants to plum pox virus. J Am Soc Hort Sci 120: 943–952.
Scorza R, Callahan AM, Levy L, Damsteegt V and Ravelonandro M (1998) Transferring potyvirus coat protein genes through hybridization of transgenic plants to produce plum pox virus resistant plums (Prunus domestica L.). Acta Hort 472: 421–427.
Sijen T, Wellink J, Hiriart J-B and van Kammen AE (1996) RNA-mediated virus resistance: role of repeated transgenes and delineation of targeted regions. Plant Cell 8: 2277–2294.
Sonoda S, Mori M and Nishiguchi M (1999) Homology-dependent virus resistance in transgenic plants with the coat protein gene of sweet potato feathery mottle potyvirus: Target specificity and transgene methylation. Phytopath 89: 385–391.
Stam M, de Bruin R, Kenter S, van der Hoorn RAL, van Blokland R, Mol JNM et al. (1997) Post-transcriptional silencing of chalcone synthase in Petunia by inverted transgene repeats. Plant J 12: 63–82.
Tanzer MM, Thompson WF, Law MD, Wernsman EA and Uknes S (1997) Characterization of post-transcriptionally suppressed transgene expression that confers resistance to tobacco etch virus infection in tobacco. Plant Cell 9: 1411–1423.
Wassenegger M and Pélissier T (1998) A model for RNA-mediated gene silencing in higher plants. Plant Mol Biol 37: 349–362.
Waterhouse PM, Graham MW and Wang M-B (1998) Virus resistance and gene silencing in plants can be induced by simultaneous expression of sense and antisense RNA. Proc Natl Acad Sci USA 95: 13959–13964.
Wilson TMA (1993) Strategies to protect crop plants against viruses: Pathogen-derived resistance blossoms. Proc Natl Acad Sci USA 90: 3134–3141.
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Scorza, R., Callahan, A., Levy, L. et al. Post-transcriptional gene silencing in plum pox virus resistant transgenic European plum containing the plum pox potyvirus coat protein gene. Transgenic Res 10, 201–209 (2001). https://doi.org/10.1023/A:1016644823203
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DOI: https://doi.org/10.1023/A:1016644823203