6 documents found, page 1 of 1
Caracterização de um isolado do Bean rugose mosaic virus (BRMV) de Minas Gerais...
Maia, Felipe G. M.; Carvalho, Murilo G.; Pinto, Cleide M. F.; Zerbini, F. Murilo; Castillo-Urquiza, Gloria P.Plantas de feijão-vagem do cultivar Novirex apresentando mosaico e enrolamento de vagens, sem deformação foliar evidente, foram coletadas em 2002 em Cordisburgo, MG. Estudos preliminares identificaram o vírus como um isolado do Bean rugose mosaic virus (BRMV). Este trabalho relata a caracterização do isolado, por meio de produção e avaliação de anti-soro, determinação da gama de hospedeiros, estudo da transmiss...
Six novel begomoviruses infecting tomato and associated weeds in Southeastern B...
Castillo-Urquiza, Gloria P.; Beserra Jr., José Evando A.; Bruckner, Fernanda P.; Lima, Alison T. M.; Varsani, Arvind; Alfenas-Zerbini, PolianeThe incidence of tomato-infecting begomoviruses has sharply increased in Brazil following the introduction of the B biotype of the whitefly vector in the early 1990s. Five definitive species and six tentative species have been described since then. Here, we report the detection of members of an additional six novel species, three in tomato and three infecting weeds that are commonly associated with tomato field...
High genetic variability and recombination in a begomovirus population infectin...
Silva, Sarah J. C. da; Castillo-Urquiza, Gloria P.; Hora Júnior, Braz T.; Assunção, Iraildes P.; Lima, Gaus S. A.; Pio-Ribeiro, GilvanDiseases caused by begomoviruses are a serious constraint to crop production in many tropical and subtropical areas of the world, including Brazil. Begomoviruses are whitefly-transmitted, single-stranded DNA viruses that are often associated with weed plants, which may act as natural reservoirs of viruses that cause epidemics in crop plants. Cleome affinis (family Capparaceae) is an annual weed that is frequent...
Begomovirus diversity in tomato crops and weeds in Ecuador and the detection of...
Paz-Carrasco, Lenin C.; Castillo-Urquiza, Gloria P.; Lima, Alison T. M.; Xavier, Cesar A. D.; Vivas-Vivas, Leticia M.; Mizubuti, Eduardo S. G.Viral diseases caused by begomoviruses are of economic importance due to their adverse effects on the production of tropical and subtropical crops. In Ecuador, despite reports of significant infestations of Bemisia tabaci in the late 1990s, only very recently has a begomovirus, tomato leaf deformation virus (ToLDeV, also present in Peru), been reported in tomato. ToLDeV is the first monopartite begomovirus disc...
The diversification of begomovirus populations is predominantly driven by mutat...
Lima, Alison T. M.; Silva, Jose ́ C. F.; Silva, Fábio N.; Castillo-Urquiza, Gloria P.; Silva, Fabyano F.; Seah, Yee M.; Mizubuti, Eduardo S. G.Begomoviruses (single-stranded DNA plant viruses) are responsible for serious agricultural threats. Begomovirus populations exhibit a high degree of within-host genetic variation and evolve as quickly as RNA viruses. Although the recombination-prone nature of begomoviruses has been extensively demonstrated, the relative contribution of recombination and mutation to the genetic variation of begomovirus populatio...
Brazilian begomovirus populations are highly recombinant, rapidly evolving, and...
Rocha, Carolina S.; Castillo-Urquiza, Gloria P.; Lima, Alison T. M.; Silva, Fábio N.; Xavier, Cesar A. D.; Hora-Júnior, Braz T.The incidence of begomovirus infections in crop plants sharply increased in Brazil during the 1990s following the introduction of the invasive B biotype of the whitefly vector, Bemisia tabaci. It is believed that this biotype transmitted begomoviruses from noncultivated plants to crop species with greater efficiency than indigenous B. tabaci biotypes. Either through rapid host adap- tation or selection pressure...