A New Begomovirus Inducing Yellow Mottle in Okra Crops in Mexico is Related to Sida yellow vein virus

Plant Disease
R De La Torre-AlmarazS Ambriz-Granados

Abstract

Okra (Abelmoschus esculentus L. Moench), an annual vegetable of African origin, has been cultivated in Mexico for 3 decades. Since 2000, the most important okra-producing areas in the states of Guerrero and Morelos have been affected by a disease causing yellow streak and severe distortion of fruits, a bright yellow mottle, and curling and distortion of leaves. These symptoms and the presence of whiteflies (Bemisia tabaci Gennadius) suggest a viral etiology. Samples of symptomatic plants from three localities, Iguala (Guerrero), Mazatepec, and Xochitepec (Morelos) were collected in November 2004 and tested for the presence of viruses. Single whitefly transmissions, grafting experiments, and experimental inoculation of healthy plants by biolistic delivery of DNA extracts from symptomatic plants consistently induced yellow mottle in okra plants and suggest the presence of a DNA virus. Total DNA extracts from symptomatic plants from field and greenhouse conditions were analyzed by Southern blot hybridization using the coat protein gene of Pepper yellow vein huasteco virus as a probe at low stringency. More than 20 positive samples were subsequently used as templates for polymerase chain reaction (PCR) amplification with the degene...Continue Reading

Citations

Jan 16, 2014·Indian Journal of Virology : an Official Organ of Indian Virological Society·V VenkataravanappaM Krishna Reddy
Dec 23, 2011·Virology Journal·V VenkataravanappaM Krishna Reddy

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