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Etiology

Cytopathology and Transmission Characteristics of a Virus Isolate from Abutilon striatum. V. B. V. de Souza, Department of Plant Pathology, University of Arkansas, Fayetteville 72701, Current address: Centro de Microscopia Eletronica, Universidade Federal do Parana, 800.000-Curitiba, PR, Brazil; K. S. Kim, Department of Plant Pathology, University of Arkansas, Fayetteville 72701. Phytopathology 80:548-552. Accepted for publication 18 December 1989. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/Phyto-80-548.

Comparative studies were made of the symptomatology, transmission, and ultrastructure of a United States virus isolate (U.S. isolate) from Abutilon striatum that had been propagated vegetatively for many years and a Brazilian isolate of Abutilon mosaic virus from naturally infected Malva parviflora and Sida micrantha. The U.S. isolate differed from the Brazilian isolate in that it never induced in the experimental hosts the characteristic angular mosaic described for the Brazilian isolate, was not mechanically or vector transmitted, and induced striking and unique cytopathological changes in the infected cells of the original host as well as in graft-infected A. pictum, M. parviflora, and S. rhombifolia.

Additional keywords: Abutilon variegation mosaic, geminivirus, ultrastructure.