Tracheophyte genomes keep track of the deep evolution of the Caulimoviridae

Diop Seydina Issa, Geering Andrew D., Alfama-Depauw Françoise, Loaec Mikaël, Teycheney Pierre-Yves, Maumus Florian. 2018. Tracheophyte genomes keep track of the deep evolution of the Caulimoviridae. Scientific Reports, 8:572, 9 p.

https://doi.org/10.1038/s41598-017-16399-x

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Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : Endogenous viral elements (EVEs) are viral sequences that are integrated in the nuclear genomes of their hosts and are signatures of viral infections that may have occurred millions of years ago. The study of EVEs, coined paleovirology, provides important insights into virus evolution. The Caulimoviridae is the most common group of EVEs in plants, although their presence has often been overlooked in plant genome studies. We have refined methods for the identification of caulimovirid EVEs and interrogated the genomes of a broad diversity of plant taxa, from algae to advanced flowering plants. Evidence is provided that almost every vascular plant (tracheophyte), including the most primitive taxa (clubmosses, ferns and gymnosperms) contains caulimovirid EVEs, many of which represent previously unrecognized evolutionary branches. In angiosperms, EVEs from at least one and as many as five different caulimovirid genera were frequently detected, and florendoviruses were the most widely distributed, followed by petuviruses. From the analysis of the distribution of different caulimovirid genera within different plant species, we propose a working evolutionary scenario in which this family of viruses emerged at latest during Devonian era (approx. 320 million years ago) followed by vertical transmission and by several cross-division host swaps.

Classification Agris : H20 - Maladies des plantes
F70 - Taxonomie végétale et phytogéographie

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

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