Virus-mediated export of chromosomal DNA in plants

Marco Catoni, Emanuela Noris, Anna Maria Vaira, Thomas Jonesman, Slavica Matić, Reihaneh Soleimani, Seyed Ali Akbar Behjatnia, Nestor Vinals, Jerzy Paszkowski and Gian Paolo Accotto ()
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Marco Catoni: University of Cambridge
Emanuela Noris: National Research Council of Italy
Anna Maria Vaira: National Research Council of Italy
Thomas Jonesman: University of Cambridge
Slavica Matić: National Research Council of Italy
Reihaneh Soleimani: College of Agriculture, Shiraz University
Seyed Ali Akbar Behjatnia: College of Agriculture, Shiraz University
Nestor Vinals: National Research Council of Italy
Jerzy Paszkowski: University of Cambridge
Gian Paolo Accotto: National Research Council of Italy

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract The propensity of viruses to acquire genetic material from relatives and possibly from infected hosts makes them excellent candidates as vectors for horizontal gene transfer. However, virus-mediated acquisition of host genetic material, as deduced from historical events, appears to be rare. Here, we report spontaneous and surprisingly efficient generation of hybrid virus/host DNA molecules in the form of minicircles during infection of Beta vulgaris by Beet curly top Iran virus (BCTIV), a single-stranded DNA virus. The hybrid minicircles replicate, become encapsidated into viral particles, and spread systemically throughout infected plants in parallel with the viral infection. Importantly, when co-infected with BCTIV, B. vulgaris DNA captured in minicircles replicates and is transcribed in other plant species that are sensitive to BCTIV infection. Thus, we have likely documented in real time the initial steps of a possible path of virus-mediated horizontal transfer of chromosomal DNA between plant species.

Date: 2018
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DOI: 10.1038/s41467-018-07775-w

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