Publications by authors named "Valdir Atsushi Yuki"
Molecular and biological characterization of an isolate of the potyvirus passiflora virus Y naturally infecting soybean (Glycine max) in Brazil.
Arch Virol
December 2022
Passiflora virus Y was detected naturally infecting soybean (Glycine max) for the first time in Brazil. Here, we report the nearly complete genome sequence and molecular and biological properties of the PaVY-Br isolate. The nearly complete genome sequence is 9679 nt long and shares 84.
View Article and Find Full Text PDFThe whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), is one of the most important agricultural pests and virus vectors worldwide. Bemisia tabaci is considered a complex of cryptic species with at least 44 species. Among them, the species Middle East-Asia Minor 1 (MEAM1, formerly B biotype) and Mediterranean (MED, formerly Q biotype) are the most important, and they have attained global status.
View Article and Find Full Text PDFDistribution and phylogenetics of whiteflies and their endosymbiont relationships after the Mediterranean species invasion in Brazil.
Sci Rep
October 2018
The Bemisia tabaci is a polyphagous insect and a successful vector of plant viruses. B. tabaci is a species complex and in Brazil native species from the New World (NW) group, as well as the invasive species, Middle East-Asia Minor 1 (MEAM1) and Mediterranean (MED) were reported.
View Article and Find Full Text PDFArticle Synopsis
- Whiteflies are agricultural pests that feed on plant sap and can transmit viruses, leading to significant crop damage; they have symbiotic relationships with bacteria that impact their biology.* -
- In Brazil, researchers identified five whitefly species and examined their infections with secondary endosymbionts; notable findings included high prevalence of Hamiltonella and Rickettsia in certain populations.* -
- The study also used fluorescence in situ hybridization to determine the locations of various endosymbionts within whiteflies, revealing complex interactions between the insects and their bacterial partners.*
Article Synopsis
- The study identifies the Mediterranean species of the whitefly, Bemisia tabaci, in Brazil for the first time, highlighting its potential threat to agriculture.
- Specific samples were collected from Rio Grande do Sul, where the whitefly was found infesting various crops like Capsicum annuum and Ipomoea batatas.
- The research underlines the necessity for monitoring this species to prevent its spread to other important agricultural regions in Brazil.