First Report of Sweet Pepper (Capsicum annuum) as a Natural Host Plant for Tomato chlorosis virus

Plant Disease
G LozanoJ Navas-Castillo

Abstract

Since 1997, epidemics of a tomato yellowing disease have occurred in the Málaga and Almería provinces of southern Spain. These epidemics have been associated with infections of Tomato chlorosis virus (ToCV) (genus Crinivirus, family Closteroviridae) (2). During the past few years, an increasing incidence of the disease was observed and it spread to new areas including eastern Spain and the Balearic and Canary Islands (G. Lozano, E. Moriones, and J. Navas-Castillo, unpublished results and [1]). In 1999, plants of sweet pepper (Capsicum annuum L.) exhibiting symptoms of interveinal yellowing, mild upward leaf curling, and stunting were observed in greenhouses of Almería that were heavily infested with the whitefly, Bemisia tabaci. Symptomatic plants were tested for the presence of the begomovirus, Tomato yellow leaf curl virus, a virus previously reported in sweet pepper (3) by molecular hybridization or polymerase chain reaction (PCR). Some of these plants tested positive. Total RNA extracts from the symptomatic plants were also analyzed for the presence of tomato criniviruses using reverse transcription (RT)-PCR with primers MA59 and MA60 for the HSP70h gene (2). A PCR DNA product of the expected size (587 bp) was obtained from...Continue Reading

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