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Virus, viroid, phytoplasm and spiroplasm detected in ornamental plants from 1992 to 2003.

At the Laboratório de Fitovirologia e Fisiopatologia (Instituto Biológico), a total of 167 genera of ornamental plants belonging to 64 families were investigated, from 1992 to 2003, for the presence of virus, viroid, phytoplasm and spiroplasm caused diseases. The diagnosis and identification of the viruses were carried out by means of biological, serological and molecular assays as well as electron transmission microscopy.Tospovirus were detected in 104 samples belonging to 15 genera including cut and potted flowers along with foliage plants; Potyviridae species were present in 23 genera, among which Hyppeastrum, Lilium, Gladiolus and Dieffenbachia were infected by Potyvirus; Cucumovirus (Cucumber mosaic virus) and Ilarvirus infected 14 and 5 genera, respectively; Tobamovirus and Potexvirus, which are the two most frequent viruses in Brazil, were found in 40.4% of the orchids which represented 29.3% of the ornamental plants analised; another 7 genera (Badnavirus, Carlavirus, Caulimovirus, Furovirus and Nepovirus, Tobravirus, Tymovirus) and two families (Closteroviridae and Rhabdoviridae) of plant viruses were also detected. In this period, at least three new virus species were described in chrysanthemum, petunia and caladium. Viroid was detected in chrysanthemum, phytoplasm in lisianthus and spiroplasm in primula.

ISSN: 2447-536X

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