ABSTRACT: Plant viruses have a wide range of weed/wild hosts, which can act as virus reservoirs. Centosema brasilianum is wild leguminous species frequently found in association with cultivated fields the Northeast region country. In March 2017, plant C. was showing symptoms mosaic and leaf rolling, municipality Maceio, state Alagoas. this context, present study aimed to detect molecular charac...

Abstract Begomoviruses cause significant losses to a wide range of crops worldwide, and great progress has been made in characterizing some noncanonical proteins encoded by begomoviruses. In the present study, novel viral protein, C6, was detected Nicotiana benthamiana plants infected with tomato leaf curl China virus (ToLCCNV). Sequence analyses revealed that C6 ORF is on complementary strand ...

Kenaf (Hibiscus cannabinus L.) is a malvaceous bast fibre crop and the most promising source of “tree-free” newsprint in the world. For the last few years a begomovirus associated leaf curl disease of kenaf, characterized by upward leaf curling and stunted growth, has been observed at different locations in India. In this study biological and molecular analyses of kenaf leaf curl disease-associ...

All characterized whitefly-transmitted geminiviruses (begomoviruses) with origins in the New World (NW) have bipartite genomes composed of a DNA-A and DNA-B component. Recently, an NW begomovirus lacking a DNA-B component was associated with tomato leaf curl disease (ToLCD) in Peru, and it was named Tomato leaf deformation virus (ToLDeV). Here, we show that isolates of ToLDeV associated with To...

The whitefly Bemisia tabaci (Gennadius) is a widely distributed pest of many important food and fiber crops. This whitefly is also a vector of more than 70 plant-infecting viruses. A cell line was established in vitro using embryonic tissues from the eggs of Bemisia tabaci (Gennadius), B biotype (pseudonym B. argentifolii Bellows & Perring), and referred to as 'Btb(Ba)97, Hunter-Polston'. Cell ...

Whitefly vector insects can spread the Pepper yellow leaf curl Indonesia virus (PYLCIV) that causes Begomovirus disease. One whitefly transmit virus, which belongs to genus. It is suspected more whitefly, higher incidence and severity of The increased disease affect chili yields. This study aimed assess relationship between population level, disease's intensity, production peppers. research met...

Tomato chlorosis virus (ToCV), a species in the Crinivirus genus, was first reported in tomatoes in Brazil (state of São Paulo) in 2008. This was followed by reports in several other Brazilian states. Tomato plants with chlorotic spots and leaf roll symptoms are frequently observed in tomato fields with high whitefly populations in Central Brazil. These plants could be infected with a begomovir...

Viral diseases occur wherever sweet potato (Ipomoea batatas) is cultivated and because this crop is vegetatively propagated, accumulation and perpetuation of viruses can become a major constraint for production. Up to 90% reductions in yield have been reported in association with viral infections. About 20 officially accepted or tentative virus species have been found in sweet potato and other ...

Whitefly-transmitted viruses belonging to the genus Begomovirus (family Geminiviridae) represent a substantial threat to agricultural food production. The rapid evolutionary potential of these single-stranded DNA viruses combined with the polyphagous feeding behavior of their whitefly vector (Bemisia tabaci) can lead to the emergence of damaging viral strains. Therefore, it is crucial to charac...

The majority of plant viruses are transmitted by insect vectors between hosts, and transovarial transmission of viruses from vector parents to offspring has great significance to their epidemiology. Begomoviruses are transmitted by the whitefly Bemisia tabaci in a circulative manner and are maintained through a plant-insect-plant cycle. Other routes of begomovirus transmission are not clearly k...