Tomato leaf curl Mahé virus: a novel tomato-infecting monopartite begomovirus from the Seychelles

Scussel, Sarah; Claverie, Sohini; Hoareau, Murielle; Moustache, Ravi; Delatte, Hélène; Lefeuvre, Pierre; Lett, Jean‐Michel

doi:10.1007/s00705-018-4007-3

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…Several new species have been identified that are recombinants of either related or phylogenetically distant viruses. In the genus Begomovirus, tomato yellow leaf curl sardinia virus, tomato yellow leaf curl Axarquia virus, sweet potato leaf curl Canary virus, tomato leaf curl Mahé virus, and tomato leaf curl Yunnan virus are all new species created through recombination [106,164,182].…”

Section: Recombinationmentioning

confidence: 99%

Determinants of Virus Variation, Evolution, and Host Adaptation

LaTourrette

García-Ruíz

2022

Pathogens

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Virus evolution is the change in the genetic structure of a viral population over time and results in the emergence of new viral variants, strains, and species with novel biological properties, including adaptation to new hosts. There are host, vector, environmental, and viral factors that contribute to virus evolution. To achieve or fine tune compatibility and successfully establish infection, viruses adapt to a particular host species or to a group of species. However, some viruses are better able to adapt to diverse hosts, vectors, and environments. Viruses generate genetic diversity through mutation, reassortment, and recombination. Plant viruses are exposed to genetic drift and selection pressures by host and vector factors, and random variants or those with a competitive advantage are fixed in the population and mediate the emergence of new viral strains or species with novel biological properties. This process creates a footprint in the virus genome evident as the preferential accumulation of substitutions, insertions, or deletions in areas of the genome that function as determinants of host adaptation. Here, with respect to plant viruses, we review the current understanding of the sources of variation, the effect of selection, and its role in virus evolution and host adaptation.

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Section: Recombinationmentioning

confidence: 99%

Determinants of Virus Variation, Evolution, and Host Adaptation

LaTourrette

García-Ruíz

2022

Pathogens

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“…In the last 10 years, several novel begomovirus species were described in different parts of the world (Table 1 and Figure 1). From the Afrotropic ecoregion, tomato leaf curl Kunene virus (Lett et al, 2020), tomato leaf curl Mahé virus (Scussel et al, 2018), and tomato leaf curl Burkina Faso virus (Ouattara et al, 2017) were recently discovered. Numerous begomoviruses were discovered in Neotropic countries, which include four novel species: tomato leaf deformation virus (ToLDeV; Márquez-Martín et al, 2011), tomato apical leaf curl virus (Vaghi Medina et al, 2018), tomato twisted leaf virus (Romay et al, 2019), and pepper leafroll virus (PepLRV; Melgarejo et al, 2013;Martínez-Ayala et al, 2014).…”

Section: Begomoviruses and Their Satellite Virusesmentioning

confidence: 99%

Global Advances in Tomato Virome Research: Current Status and the Impact of High-Throughput Sequencing

et al. 2021

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Viruses cause a big fraction of economically important diseases in major crops, including tomato. In the past decade (2011–2020), many emerging or re-emerging tomato-infecting viruses were reported worldwide. In this period, 45 novel viral species were identified in tomato, 14 of which were discovered using high-throughput sequencing (HTS). In this review, we first discuss the role of HTS in these discoveries and its general impact on tomato virome research. We observed that the rate of tomato virus discovery is accelerating in the past few years due to the use of HTS. However, the extent of the post-discovery characterization of viruses is lagging behind and is greater for economically devastating viruses, such as the recently emerged tomato brown rugose fruit virus. Moreover, many known viruses still cause significant economic damages to tomato production. The review of databases and literature revealed at least 312 virus, satellite virus, or viroid species (in 22 families and 39 genera) associated with tomato, which is likely the highest number recorded for any plant. Among those, here, we summarize the current knowledge on the biology, global distribution, and epidemiology of the most important species. Increasing knowledge on tomato virome and employment of HTS to also study viromes of surrounding wild plants and environmental samples are bringing new insights into the understanding of epidemiology and ecology of tomato-infecting viruses and can, in the future, facilitate virus disease forecasting and prevention of virus disease outbreaks in tomato.

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“…Begomoviruses in the NW are mostly bipartite (Rojas et al, 2018). In Africa, both mono‐ and bipartite begomoviruses occur (Ouattara et al, 2020; Scussel et al, 2018; Seka et al, 2017). The genomes of monopartite begomoviruses have six genes.…”

Section: Introductionmentioning

confidence: 99%

Speciation driven by recombination in the evolution of tomato curly stunt virus in Mozambique

et al. 2021

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Begomoviruses constitute a group of viruses of great economic importance in agriculture, mainly in tropical and subtropical regions, including southern Africa. Tomato curly stunt virus (ToCSV) is an important begomovirus described in South Africa and later reported in Mozambique impacting tomato cultivation. In Mozambique, the severe disease caused by ToCSV limits tomato cultivation and compromises the income of small and medium farms. Due to the scarcity of information about this pathogen, in this study we explored its genetic variability to elucidate the mechanisms that drive its evolution. In 2019, 27 ToCSV full‐length sequences were obtained from tomato foliar samples with virus‐like symptoms collected in the district of Chokue in Gaza province, Mozambique. Sequence analysis showed that isolates from Mozambique have a nucleotide identity of 90.9%–96.9% with the isolate from South Africa (AF261885) and are grouped into two distinct strains that we named ToCSV‐Chok I and ToCSV‐Chok II. The ToCSV‐Chok II strain has a higher nucleotide diversity than ToCSV‐Chok I in the Rep gene. Recombination is involved in the evolutionary history of ToCSV, with both intraspecific and interspecific recombination events detected in the Rep gene. Our results indicate a prevalence of ToCSV in tomato crops in the Chokue district of Mozambique (the major tomato‐producing region of the country) and suggest that ToCSV is undergoing speciation due to the effect of recombination.

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Tomato leaf curl Mahé virus: a novel tomato-infecting monopartite begomovirus from the Seychelles

Cited by 6 publications

References 8 publications

Determinants of Virus Variation, Evolution, and Host Adaptation

Determinants of Virus Variation, Evolution, and Host Adaptation

Global Advances in Tomato Virome Research: Current Status and the Impact of High-Throughput Sequencing

Speciation driven by recombination in the evolution of tomato curly stunt virus in Mozambique

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