Fitopatologia - Artigos
URI permanente para esta coleçãohttps://locus.ufv.br/handle/123456789/11741
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Item Complete nucleotide sequences of two new begomoviruses infecting the wild malvaceous plant Melochia sp. in Brazil(Archives of Virology, 2015-10-01) Fiallo-Olivé, Elvira; Zerbini, F. Murilo; Navas-Castillo, JesúsWild malvaceous plants are hosts for a large number of begomoviruses (genus Begomovirus, family Geminiviridae) in both the Old World and the New World. Here, we report the complete genome sequences of two new begomoviruses from Melochia sp. plants from Brazil. The cloned bipartite genomes, composed of DNA-A and DNA-B, showed the typical organization of the New World begomoviruses but they were distantly related to the genomes of other begomoviruses. We propose the names Melochia mosaic virus and Melochia yellow mosaic virus for these begomoviruses.Item Six novel begomoviruses infecting tomato and associated weeds in Southeastern Brazil(Archives of Virology, 2008-08-24) Castillo-Urquiza, Gloria P.; Beserra Jr., José Evando A.; Bruckner, Fernanda P.; Lima, Alison T. M.; Varsani, Arvind; Alfenas-Zerbini, Poliane; Zerbini, F. MuriloThe 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 fields: Blainvillea rhomboidea, Sida rhombifolia and Sida micrantha. Tomato and weed samples were collected in two major tomato-growing regions of southeastern Brazil in 2005 and 2007. Two of the novel viruses were present in tomato plants collected in Paty do Alferes, Rio de Janeiro state. Three novel viruses were present in weed samples collected in Coimbra, Minas Gerais state. One virus was present in tomato samples collected at both locations. Genome features indicate that all six species are typical New World, bipartite begomoviruses. However, the viruses belonging to two of the novel species did not cluster with the Brazilian viruses in a phylogenetic tree. These species could represent a distinct lineage of New World begomoviruses, found in Brazil for the first time.