Evolution of Integrated Plant Viruses

Höhn, Thomas; Richert-Pöggeler, Katja; Staginnus, Christina; Harper, Glyn; Schwarzacher, Trude; Teo, Chee How; Teycheney, Pierre-Yves; Iskra-Caruana, Marie-Line; Hull, Roger

doi:10.1007/978-3-540-75763-4_4

Cited by 44 publications

(47 citation statements)

References 94 publications

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“…It is assumed that EPRV-induced homology-dependent gene silencing targeted the counterpart nonintegrated viruses: Petunia vein clearing virus (PVCV; genus Petuvirus) in petunia plants and Tobacco vein clearing virus (TVCV; genus Cavemovirus) in tomato plants. This mechanism is also proposed for Banana streak virus (BSV; genus Badnavirus) in wild diploid Musa balbisiana resistant to both endogenous BSV (eBSV) and BSV (28). Resistance mechanisms against episomal and endogenous forms of members of the Caulimoviridae family are seen as plant counteradaptations in response to the presence of EPRVs in their genomes.…”

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confidence: 98%

“…Viral sequences first integrate into the germinal cells to become part of the plant genome. EPRVs are then fixed in plant populations by evolutionary forces such as natural selection and/or genetic drift (28,31). The integration mechanism is thought to involve illegitimate recombination between the plant and viral genomes (63).…”

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confidence: 99%

“…First, EPRVs may contribute to genome size modification, induce changes in the methylation status of the host genome, and also act as genomic reorganizers by inducing chromosomal rearrangements (28), much like transposable elements (1,35). In petunia (Petunia sp.)…”

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confidence: 99%

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Evolution of Endogenous Sequences of Banana Streak Virus : What Can We Learn from Banana ( Musa sp.) Evolution?

Gayral

Blondin

Guidolin

et al. 2010

J Virol

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. Although eBSVs probably arose from accidental events, infectious eBSVs constitute an extreme case of parasitism, as well as a newly described strategy for vertical virus transmission in plants. We investigated the early evolutionary stages of infectious eBSV for two distinct BSV species-GF (BSGFV) and Imové (BSImV)-through the study of their distribution, insertion polymorphism, and structure evolution among selected banana genotypes representative of the diversity of 60 wild Musa species and genotypes. To do so, the historical frame of host evolution was analyzed by inferring banana phylogeny from two chloroplast regions-matK and trnL-trnF-as well as from the nuclear genome, using 19 microsatellite loci. We demonstrated that both BSV species integrated recently in banana evolution, circa 640,000 years ago. The two infectious eBSVs were subjected to different selective pressures and showed distinct levels of rearrangement within their final structure. In addition, the molecular phylogenies of integrated and nonintegrated BSVs enabled us to establish the phylogenetic origins of eBSGFV and eBSImV.

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Evolution of Endogenous Sequences of Banana Streak Virus : What Can We Learn from Banana ( Musa sp.) Evolution?

Gayral

Blondin

Guidolin

et al. 2010

J Virol

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“…A striking feature of plant EPRVs, whether infectious or not, is that they are present mostly in heterochromatin, and that their integration sites are often flanked with transposable elements in the family Metaviridae. Another feature shared by the non-infectious EPRVs characterized so far is that they are transcribed at low levels into RNA molecules that often trigger resistance based on transcriptional or post-transcriptional gene silencing mechanisms (Hohn et al, 2007). Strikingly, similar mechanisms also play a central role in the virus resistance conferred by the expression of viral transgenes in many -but not allVRTPs.…”

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Possible roles of endogenous plant viral sequences and transgenes containing viral sequences in both virus resistance and virus emergence

Teycheney¹,

Tepfer

2007

Environ. Biosafety Res.

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“…Interestingly, some of these integrated viral sequences are infectious, leading frequently to plant infection. Such sequences have undergone extensive viral genome rearrangements and contain more than one copy of the viral genome (9). Surprisingly, these sequences appear to be inherited by their host plant as Mendelian traits and to be transmitted vertically like ERVs.…”

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Three Infectious Viral Species Lying in Wait in the Banana Genome

Chabannes

Baurens

Duroy

et al. 2013

J Virol

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e Plant pararetroviruses integrate serendipitously into their host genomes. The banana genome harbors integrated copies of banana streak virus (BSV) named endogenous BSV (eBSV) that are able to release infectious pararetrovirus. In this investigation, we characterized integrants of three BSV species-Goldfinger (eBSGFV), Imove (eBSImV), and Obino l'Ewai (eBSOLV)-in the seedy Musa balbisiana Pisang klutuk wulung (PKW) by studying their molecular structure, genomic organization, genomic landscape, and infectious capacity. All eBSVs exhibit extensive viral genome duplications and rearrangements. eBSV segregation analysis on an F1 population of PKW combined with fluorescent in situ hybridization analysis showed that eBSImV, eBSOLV, and eBSGFV are each present at a single locus. eBSOLV and eBSGFV contain two distinct alleles, whereas eBSImV has two structurally identical alleles. Genotyping of both eBSV and viral particles expressed in the progeny demonstrated that only one allele for each species is infectious. The infectious allele of eBSImV could not be identified since the two alleles are identical. Finally, we demonstrate that eBSGFV and eBSOLV are located on chromosome 1 and eBSImV is located on chromosome 2 of the reference Musa genome published recently. The structure and evolution of eBSVs suggest sequential integration into the plant genome, and haplotype divergence analysis confirms that the three loci display differential evolution. Based on our data, we propose a model for BSV integration and eBSV evolution in the Musa balbisiana genome. The mutual benefits of this unique host-pathogen association are also discussed.

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Evolution of Integrated Plant Viruses

Cited by 44 publications

References 94 publications

Evolution of Endogenous Sequences of Banana Streak Virus : What Can We Learn from Banana ( Musa sp.) Evolution?

Evolution of Endogenous Sequences of Banana Streak Virus : What Can We Learn from Banana ( Musa sp.) Evolution?

Possible roles of endogenous plant viral sequences and transgenes containing viral sequences in both virus resistance and virus emergence

Three Infectious Viral Species Lying in Wait in the Banana Genome

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