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Attempts to identify host sources of Tomato severe rugose virus inoculum through partial viral genome sequences

Grant number: 19/16248-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): September 01, 2019
Effective date (End): August 31, 2022
Field of knowledge:Agronomical Sciences - Agronomy - Plant Health
Principal researcher:Jorge Alberto Marques Rezende
Grantee:Camila Geovana Ferro
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated research grant:18/18274-3 - Begomovirus and crinivirus in solanasceous: regional molecular epidemiology and sustainable integrated management alternatives, AP.TEM

Abstract

In Brazil, begomoviruses are considered one of the most important pathogen in tomato crop. Several begomoviruses can infect tomato in the country. However, tomato severe rugose virus (ToSRV), transmitted by Bemisia tabaci MEAM1 (biotype B), in a persistent circulatory way, is predominant. Besides tomato, this begomovirus infects plants of other solanaceae and weeds. The question remains unanswered as the main source of ToSRV inoculum in the field. The conceptual model that is being applied is the existence of amplifier hosts. This model is already recognized in the study of epidemics of zoonoses, but has never been applied to the study of plant diseases. The hypothesis is that in the absence of tomato plants in the field, ToSRV asymptomatic hosts and the vector would function as amplifiers of the pathogen. Thus, the main objective of this project will be the identification of possible source (s) of ToSRV in the field and propose sustainable alternatives for the management, not only of begomoviruses, but other vector-borne diseases.

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