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Resistance of Transgenic Prunus domestica to Plum Pox Virus Infection

November 1997 , Volume 81 , Number  11
Pages  1,231 - 1,235

M. Ravelonandro , Station de Pathologie Vegetale, INRA, Centre de Recherches de Bordeaux, BP 81 33883 Villenave d'Ornon, France ; R. Scorza , USDA-ARS Appalachian Fruit Research Station, 45 Wiltshire Road, Kearneysville, WV 25436 ; J. C. Bachelier , Station de Pathologie Vegetale, INRA, Bordeaux ; G. Labonne , Laboratoire de Zoologie Agricole, ENSAM-INRA, Place Viala, 34000 Montpellier, France ; L. Levy , USDA-APHIS, PPQ, Plant Methods Development Laboratory, Bldg. 580, Beltsville, MD 20705 ; V. Damsteegt , USDA-ARS Foreign Disease-Weed Science Research Unit, Fort Detrick, Frederick, MD 21702 ; A. M. Callahan , USDA-ARS Appalachian Fruit Research Station, Kearneysville, WV 25436 ; and J. Dunez , Station de Pathologie Vegetale, INRA, Bordeaux



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Accepted for publication 29 July 1997.
ABSTRACT

Transgenic plum trees (Prunus domestica) containing the plum pox potyvirus coat protein (PPV-CP) gene were inoculated with PPV by aphid feeding or chip budding. Infection was monitored by evaluation of virus symptoms, DAS-ELISA, and immunoblot assays. Based on observations and analyses over 3 years including two dormancy cycles, one out of five transgenic clones (C-5), was found to be resistant to infection whether inoculated by aphids or by chip budding. PPV could not be detected in any inoculated plants of the C-5 clone by immunoblot or immunocap-ture-reverse transcriptase-polymerase chain reaction assays. To our knowledge, this is the first P. domestica clone resistant to PPV infection produced by genetic engineering.



© 1997 The American Phytopathological Society