Rojas, A. 2004. A complex of Begomoviruses affecting tomato crops in Nicaragua. Doctor’s dissertation ISSN 1401-6249, ISBN 91-576-6772-1 Diseases caused by begomoviruses (family Geminiviridae, genus Begomovirus) constitute a serious constraint to vegetable production in Nicaragua as they are associated with large economical losses. This thesis was done in an effort to identify and characterize ...

a begomovirus, tentatively named tobacco leaf curl japan virus-jpu (tblcjv-jpu), was isolated from lonicera japonica (honeysuckle) plants grown in utsunomiya showing veinal chlorosis symptoms. the tblcjv-jpu genome with 2,761 nt showed a highest identity with tblcjv-jp3 and was also close to tblcjv and as well to tblcjv-jp2. the overall nt identity with tblcjv-jp3 amounted to 92.94%, while the ...

Asystasia gangetica (A. gangetica) leaves exhibiting yellow mosaic symptoms were tested for the presence of begomovirus infection. The putative full-length a bipartite components A and B molecules, respectively amplified, sequenced, analyzed. This represents distinct species infecting in Benin Republic West Africa.

Viruses of the genus Begomovirus (family Geminiviridae) are economically important phytopathogens that are transmitted plant-to-plant by the whitefly Bemisia tabaci. Most Old World (OW) begomoviruses are monopartite and many of these interact with symptoms and host range determining betasatellites. Tomato leaf curl New Delhi virus (ToLCNDV) is one of only a few OW begomoviruses with a bipartite...

Cassava is a major factor in food security across sub-Saharan Africa. However, the crop is susceptible to losses due to biotic stresses, in particular to viruses of the genus Begomovirus (family Geminiviridae) that cause cassava mosaic disease (CMD). During the 1990s, an epidemic of CMD severely hindered cassava production across eastern and central Africa. A significant influence on the appear...

The genus Begomovirus (family Geminiviridae) contains pathogens that infect economically important crops, including cassava, cotton, pepper, potato and tomato (Tabein et al., 2021). During 2019–2021, two hibiscus plants with begomovirus-like symptoms vein enation cup-shaped leaves (Figs. 1, 2) were observed in the botanical garden of Shahid Chamran University Ahvaz, Khuzestan Province, southwes...

DNA beta is a circular single-stranded satellite DNA which co-infects with certain monopartite helper begomoviruses to cause economically important diseases, such as cotton leaf curl disease (CLCuD). DNA beta encodes a single protein, betaC1. Tomato leaf curl New Delhi virus (ToLCNDV) is a bipartite begomovirus in which both DNA A and DNA B are required for systemic infection. Inoculation of to...

Traditional DNA sequencing methods are inefficient, lack the ability to discern the least abundant viral sequences, and ineffective for determining the extent of variability in viral populations. Here, populations of single-stranded DNA plant begomoviral genomes and their associated beta- and alpha-satellite molecules (virus-satellite complexes) (genus, Begomovirus; family, Geminiviridae) were ...

Plant-pathogenic begomoviruses have a complex association with their whitefly vector and aspects concerning virus genetic activity (genome replication and gene transcription) within the insect remain highly controversial. Virus transcript abundance was assessed by quantifying selected gene transcripts of Tomato mottle virus (ToMoV, a New World bipartite begomovirus) and Tomato yellow leaf curl ...

Despite having single stranded DNA genomes that are replicated by host DNA polymerases, viruses in the family Geminiviridae are apparently evolving as rapidly as some RNA viruses. The observed substitution rates of geminiviruses in the genera Begomovirus and Mastrevirus are so high that the entire family could conceivably have originated less than a million years ago (MYA). However, the existen...