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Petunia vein banding virus: Characterization of a New Tymovirus from Petunia × hybrida

July 2000 , Volume 84 , Number  7
Pages  739 - 742

M. A. V. Alexandre , L. M. L. Duarte , E. B. Rivas , C. M. Chagas , and M. M. Barradas , Instituto Biológico, Av. Cons. Rodrigues Alves, 1252, CEP 04014-002, São Paulo, SP, Brazil ; and R. Koenig , Biologische Bundesanstalt für Land-und Forstwirtschaft, Institut für Pflanzenvirologie, Mikrobiologie und Biologische Sicherheit, Messeweg 11/12, D-38104, Braunschweig, Germany

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Accepted for publication 10 March 2000.

Petunia plants from a nursery in the State of Rio Grande do Sul, Brazil, showed pronounced vein banding and contained isometric particles with diameters of approximately 45 and 30 nm. The larger ones apparently represent a caulimovirus, while the smaller ones, which included both empty shells and full particles, were identified as those of a new tymovirus for which we propose the name Petunia vein banding virus (PetVBV). Originally, PetVBV was transmitted only with difficulty to healthy petunia plants. However, from an experimentally infected petu-nia, it was later readily transmitted also to Nicotiana benthamiana and Nicandra physalodes, but not to other species in the Solanaceae or other plant families. It produces cytopathic effects typical for tymovirus infections. Its coat protein shows approximately 65% amino acid sequence identity with those of Eggplant mosaic and Andean potato latent viruses, to which it is also serologically more closely related than to any other tymoviruses.

The American Phytopathological Society, 2000