Graduation: mw. Simone da Graça Ribeiro:"Diversity and host interactions of emerging tomato begomoviruses in Brazil"

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1 Dec 2006 13:30
Unit: Wageningen UR
Location: Aula, building 362, Gen. Foulkesweg1, Wageningen
Organisation: Wageningen University
Promotor: prof.dr. R.W. Goldbach (Virology)
Co Promotor: Dr. ir. M.W. Prins (promotor)

 Over the last decade, the prevalence and severity of tomato infecting begomoviruses have increased to epidemic proportions and consequently, begomoviruses became one of the major limitations for tomato production throughout Brazil. The sudden emergence of these whitefly-transmitted geminiviruses followed the introduction and rapid dispersal of the B biotype of Bemisia tabaci. As limited sources of resistance were available, this situation required the development of novel strategies for the disease control including the production of resistant cultivars which should be part of an integrated management approach. These management strategies should be based on a more detailed understanding of the pathosystems involved. Therefore, this PhD research focused on a comprehensive identification and characterization of the begomovirus species involved in the epidemics. Also a study of different aspects implicated in the complex virus-host interactions involving virulence determinants encoded by the virus and the RNA silencing response generated by begomovirus infection in plants was carried out.
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