Fossil viruses in the heart of plants shed light on how viruses evolve

Like burglars, who sometimes leave their fingerprints after a “visit”, viruses may leave theirs in the genome of the hosts they infect.

In recent years, analyses of data obtained by genome sequencing programmes have shown that the presence of viral sequences within the genome of higher living organisms is the rule rather than the exception. In flowering plants, or angiosperms, a veritable molecular invasion has been discovered recently. It provides clues as to how certain plant viruses have evolved.

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Geering A.D.W., Maumus F., Copetti D., Choisne N., Zwicki D., Zytnicki M., McTaggart A.R, Scalabrin S., Vezzulli S., Wing R.A., Quesneville H., Teycheney P.-Y., 2014. Endogenous florendoviral elements are major components of plant genomes and molecular fossils of reverse-transcribing viruses with unique and variable genome organizations. Nature Communications, 5 : 5269. Doi : 10.1038/ncomms6269

Published: 17/11/2014