Ageratum conyzoides: a host to a unique begomovirus disease complex in Cameroon.

  title={Ageratum conyzoides: a host to a unique begomovirus disease complex in Cameroon.},
  author={Walter Nkeabeng Leke and Judith K. Brown and Maaike E Ligthart and Naaem Sattar and Dominic Kumbah Njualem and Anders Kvarnheden},
  journal={Virus research},
  volume={163 1},

Diversity and interactions of begomoviruses and their associated DNA-satellites

The results suggest that the diversity of begomoviruses and their associated DNA-satellites in Africa is much higher than previously thought, and that it may be similar to the diversity in Asia.

Occurrence of Cassava Mosaic Begomovirus New Species and Ageratum Leaf Curl Cameroon Virus on Pepper (Capsicum annuum L.) in Togo

It is shown that cassava begomoviruses can infect other crops and will help in understanding the epidemiology related to whitefly-transmitted begomviruses in cassava intercropping systems.

Genetic Diversity of Tomato (Solanum lycopersicum L.) Begomovirus in Togo

A high degree of genetic diversity of tomato begomoviruses identified in Togo is suggested.

Begomovirus disease complex: emerging threat to vegetable production systems of West and Central Africa

A close relationship between the begomoviruses infecting pepper and tomato and A. conyzoides and the detection of the same alphasatellite in them support the idea that weeds are important reservoirs for begomviruses and their satellites.

Mixed infection by two West African tomato-infecting begomoviruses and ageratum leaf curl Cameroon betasatellite in tomato in Cameroon

The identification of ALCCMB in Ageratum and now in tomato strongly suggests Agerum may be an alternative host to these viruses and that ALCC MB is non host specific and may cause severe diseases when transmitted to other crops.

Molecular Evidence for Association of Tobacco Curly Shoot Virus and a Betasatellite with Curly Shoot Disease of Common Bean (Phaseolus vulgarisL.) from India

The analysis of the whole genome sequence and individual ORFs of this virus indicated that it is very closely related to the TbCSV infecting solanaceous and other weed crops in India and China and suggests that the virus is a recombinant and evolved from recombination of Tobacco curly shoot virus, Munbean yellow mosaic virus, Tomato leaf curl Jodhpur virus, Tobacco leaf curl Yunnan virus and Ageratum enation virus like ancestors.

Molecular characterization of genetic diversity of tomato (Solanum lycopersicum L.) begomovirus in Togo

A high degree of genetic diversity is suggested of tomato begomovirus identified in Togo and their relationship with other begsomoviruses.

Compatibility and interaction of begomoviruses and DNA-satellites causing leaf curl disease in Asia, Africa and Mediterranean Region

It is confirmed that geographically diverseBegomoviruses can functionally interact with non-cognate DNA-satellites, which may cause the emergence of new begomovirus-satellite complexes.

Molecular characterization of two previously undescribed begomovirus-associated alphasatellite molecules infecting malvaceous species in Cameroon

Two begomovirus-associated alphasatellites isolated from okra and a malvastrum plant in Cameroon are members of distinct species in the genera Colecusatellite and Gosmusatellite and have been tentatively named “pepper yellow vein Mali alphas satellite” and “cotton leaf curl Gezira alphasatellite3”, respectively.



Molecular characterization of two distinct begomoviruses from Ageratum conyzoides and Malvastrum coromandelianum in China

The molecular data suggest that G52 and G87 are two distinct begomoviruses, for which the names Ageratum leaf curl virus for G 52 and Malvastrum leaf curlirus for G 87 are proposed.

First Report of Pepper yellow leaf curl Indonesia virus in Ageratum conyzoides in Indonesia.

Sequence analysis showed that five of nine samples were Ageratum yellow vein virus and the remaining four samples were a strain of Pepper yellow leaf curl Indonesia virus (PepYLCIDV), suggesting it is a strains of PepYLC IDV, which is widely prevalent in Indonesia.

An unusual alphasatellite associated with monopartite begomoviruses attenuates symptoms and reduces betasatellite accumulation.

This observation suggests that some DNA-2 alphasatellites encode a pathogenicity determinant that may modulate begomovirus-betasatellite infection by reducing betasatellite DNA accumulation.

A unique virus complex causes Ageratum yellow vein disease.

It is demonstrated that yellow vein disease of A. conyzoides results from co-infection by AYVV DNA A and a circular DNA that is approximately half its size that is designated DNA beta, which represents a satellite-like DNA.

Molecular diversity of Cotton leaf curl Gezira virus isolates and their satellite DNAs associated with okra leaf curl disease in Burkina Faso

Recombination analysis of the viruses demonstrated the interspecies recombinant origin of all CLCuGV isolates, with parents being close to Hollyhock leaf crumple virus and Tomato leaf curl Diana virus, and these results highlight the complexity of begomoviruses associated with OLCD.

Molecular characterization of a new begomovirus and divergent alphasatellite from tomato in Cameroon

The aim of this research was to determine etiology and to carry out the first molecular characterization of the suspected begomoviral causal agent(s) and associated ssDNA satellites in tomato crops in West Africa.

Pathogenicity of a natural recombinant associated with ageratum yellow vein disease: implications for geminivirus evolution and disease aetiology.

It is demonstrated that the yellow vein phenotype can also be produced by co-inoculating A. conyzoides with AYVV DNA A and recDNA-Abeta17, a naturally occurring recombinant of approximately the same size as DNA beta that contains sequences from both DNAA and DNA beta.

A begomovirus associated with ageratum yellow vein disease in Indonesia: evidence for natural recombination between tomato leaf curl Java virus and Ageratum yellow vein virus-[Java]

Symptoms induced in Nicotiana benthamiana by ToLCJV-Ageratum, To LCJV and AYVV-[Java] are consistent with the exchange of pathogenicity determinant ORF C4 during recombination.