World Management of Geminiviruses

Rojas, María R.; Macedo, M. A.; Maliano, Minor R.; Soto-Aguilar, Maria; Souza, J. O.; Briddon, R. W.; Kenyon, L.; Rivera-Bustamante, R. F.; Zerbini, F. Murilo; Adkins, Scott; Legg, J.P.; Kvarnheden, Anders; Wintermantel, William M.; Sudarshana, Mysore R.; Peterschmitt, Michel; Lapidot, Moshe; Martin, Darren P.; Moriones, Enrique; Inoue‐Nagata, Alice K.; Gilbertson, R. L.

doi:10.1146/annurev-phyto-080615-100327

Cited by 242 publications

(166 citation statements)

References 179 publications

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“…Table S3). These results suggest that, despite the greater distance between 34 sampled sites, some connection between the two regions exists, resulting in an incipient 1 pattern of differentiation. Sampling of intermediate regions between AL and MG may 2 provide a better picture of the genetic make-up of the BlYSV population.…”

Section: Introductionmentioning

confidence: 81%

“…32 The DNA-A tree displayed the same topology as the DNA-B tree for the isolates from 33 Florestal, but isolates from Coimbra and Carandaí were not segregated ( Figure 2F). 34 Interestingly, the DNA-B of isolate BR-Flo01-14 from Florestal clustered together with 1 isolates sampled in Coimbra, due to a recombination event involving parental sequences 2 from these two locations (Suppl . Table S3).…”

Section: Introductionmentioning

confidence: 99%

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Evolutionary dynamics of bipartite begomoviruses revealed by complete genome analysis

Xavier

Godinho

Mar

et al. 2020

Preprint

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2Several key evolutionary events marked the evolution of geminiviruses, culminating with 3 the emergence of bipartite genomes represented by viruses classified in the genus 4 Begomovirus. This genus represents the most abundant group of multipartite viruses, 5 contributing significantly to the observed abundance of multipartite species in the 6 virosphere. Although aspects related to virus-host interactions and evolutionary dynamics 7 have been extensively studied, the bipartite nature of these viruses has been little explored 8 in evolutionary studies. We performed a parallel evolutionary analysis of the DNA-A and 9 DNA-B components of New World begomoviruses. A total of 239 full-length DNA-B 10 sequences obtained in this study, combined with 292 DNA-A and 76 DNA-B sequences 11 retrieved from GenBank, were analyzed. The results indicate that the DNA-A and DNA-B 12 respond differentially to evolutionary processes, with the DNA-B being more permissive to 13 variation and more prone to recombination than the DNA-A. Although a clear geographic 14 segregation was observed for both components, differences in the genetic structure between 15 DNA-A and DNA-B were also observed, with cognate components belonging to distinct 16 genetic clusters. DNA-B coding regions evolve under the same selection pressures than 17 DNA-A coding regions. Together, our results indicate an interplay between reassortment 18 and recombination acting at different levels across distinct subpopulations and components. 19 20progenitor of all begomoviruses. Possibly, this association provided greater adaptability to 1 the monopartite progenitor, and consequently was maintained over the evolutionary process. 2 Understanding the processes driving the patterns of population genetic 3 differentiation and genetic variability of viruses has been a long-standing focus in the area 4 of evolutionary virology. A number of studies have been conducted to determine and 5 quantify the contribution of the mechanisms dictating the evolutionary dynamics of 6 begomovirus populations (35-37, 41-47). However, these studies were based on analysis of 7 non-segmented viruses or of the DNA-A component of bipartite viruses. Considering the 8 important role played by the DNA-B in the infection process, evolutionary studies that 9 consider this component are needed. The analysis of the complete genome can provide a 10 more accurate picture of the evolution of begomovirus and a better understanding of the 11 evolution of multipartite genomes in general. 12 Here, using a population genetics approach, we performed a parallel evolutionary 13 analysis of the DNA-A and DNA-B component of NW begomoviruses from cultivated and 14 non-cultivated hosts. The two components respond differentially to evolutionary processes, 15 with the DNA-B being more variable and more prone to recombination than the DNA-A. A 16 clear geographic segregation was observed for both components, but differences between 17 the genetic structure of cognate DNA-A and DNA-B components could be observed. 18 Intere...

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Evolutionary dynamics of bipartite begomoviruses revealed by complete genome analysis

Xavier

Godinho

Mar

et al. 2020

Preprint

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“…Not known for NeVM and no marafivirus has been reported to be seedtransmitted (Dreher et al, 2012) No Not known for NeVM and no marafivirus has been reported to be pollentransmitted (Mink, 1995;Card et al, 2007 (Mink, 1995;Card et al, 2007;EFSA PLH Panel, 2013) Cannot be excluded Not known for PrGVA, but Geminiviridae are generally transmitted by insects (Rojas et al, 2018) …”

Section: Nomentioning

confidence: 99%

Pest categorisation of non‐EU viruses and viroids of Prunus L.

Bragard¹,

Dehnen‐Schmutz²,

Gonthier³

et al. 2019

EFS2

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Following a request from the EU Commission, the Panel on Plant Health addressed the pest categorisation of the viruses and viroids of Prunus L. determined as being either non-EU or of undetermined standing in a previous EFSA opinion. These infectious agents belong to different genera and are heterogeneous in their biology. With the exclusion of Ilarvirus S1 and Ilarvirus S2, for which very limited information exists, the pest categorisation was completed for 26 viruses and 1 viroid having acknowledged identities and available detection methods. All these viruses are efficiently transmitted by vegetative plant propagation techniques, with plants for planting representing the major pathway for long-distance dispersal and thus considered as the major pathway for entry. Depending on the virus, additional pathway(s) can also be Prunus seeds, pollen and/or vector(s). Most of the viruses categorised here are known to infect only one or few plant genera, but some of them have a wide host range, thus extending the possible entry pathways. Apple scar skin viroid, American plum line pattern virus, cherry mottle leaf virus, cherry rasp leaf virus, cherry rosette virus, cherry rusty mottle-associated virus, cherry twisted leaf-associated virus, peach enation virus, peach mosaic virus, peach rosette mosaic virus, tobacco ringspot virus and tomato ringspot virus meet all the criteria evaluated by EFSA to qualify as potential Union quarantine pests (QPs). With the exception of impact in the EU territory, on which the Panel was unable to conclude, apricot vein clearing virus, Asian prunus virus 1, Asian prunus virus 2, Asian prunus virus 3, Caucasus prunus virus, cherry virus B, Mume virus A, nectarine stem pitting-associated virus, nectarine virus M, peach chlorotic mottle virus, peach leaf pitting-associated virus, peach virus D, prunus virus F and prunus virus T satisfy all the other criteria to be considered as potential Union QPs. Prunus geminivirus A does not meet the criterion of having negative impact in the EU. For several viruses, especially those recently discovered, the categorisation is associated with high uncertainties mainly because of the absence of data on their biology, distribution and impact. Since this opinion addresses specifically the non-EU viruses, in general these viruses do not meet the criteria assessed by EFSA to qualify as potential Union regulated non-quarantine pests.

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“…In 2018, approximately 59.7 thousand hectares were planted to tomatoes in the country, and 4.1 million tons of fruit was produced (Instituto Brasileiro de Geografia e Estatística [IBGE], 2018). Tomato production can be affected by several begomoviruses, the most prevalent being tomato severe rugose virus (ToSRV) (Fernandes et al, 2008;Inoue-Nagata et al, 2016;Rojas et al, 2018;Mituti et al, 2019). Begomoviruses are transmitted by the silverleaf whitefly Bemisia tabaci in a circulative-persistent manner (Rosen et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Amplifier Hosts May Play an Essential Role in Tomato Begomovirus Epidemics in Brazil

et al. 2020

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Current control of tomato golden mosaic disease, caused in Brazil predominantly by tomato severe rugose virus (ToSRV), is dependent on both, planting resistant/tolerant hybrids and intensive insecticide sprays (two to three per week) for controlling Bemisia tabaci, the vector of ToSRV. Resistant hybrids only confer moderate resistance to infection by ToSRV and some tolerance to the disease. Insecticide sprays, although widely used, have failed in most tomato production areas in Brazil, as they are unable to reduce primary spread, i.e., infection caused by the influx of viruliferous whiteflies coming from external sources of inoculum. Severe epidemics are recurrently observed in some tomato fields in several Brazilian regions, which prompted us to postulate the existence in the agroecosystem, in some places and time, of amplifier hosts that provide the necessary force of infection for epidemics to occur, even in the absence of secondary spread in the target crop. Amplifier hosts are ideally asymptomatic, occur in high density near the target crop, and support growth of both virus and vector. Soybean and common bean are potential amplifier hosts for begomovirus in tomato crops. Our results support the hypothesis that soybean plants may play an important role as an amplifier host of ToSRV for tomato crops in the field, although this does not seem to be a frequent phenomenon. Successful amplification will depend on several factors, including the soybean cultivar, the soybean stage of development at the moment of infection, the ToSRV isolate, and the perfect synchrony between the beginning of a soybean field and the end of a ToSRV-infected crop, and, later, between the senescence of the ToSRVinfected soybean plants and the new tomato crop. The concept of amplifier hosts has been widely used in ecology of zoonoses but, to our knowledge, has never been used in botanical epidemiology.

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World Management of Geminiviruses

Cited by 242 publications

References 179 publications

Evolutionary dynamics of bipartite begomoviruses revealed by complete genome analysis

Evolutionary dynamics of bipartite begomoviruses revealed by complete genome analysis

Pest categorisation of non‐EU viruses and viroids of Prunus L.

Amplifier Hosts May Play an Essential Role in Tomato Begomovirus Epidemics in Brazil

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