Published 2021-09-13
Keywords
- Citrus virus,
- vein enation disease,
- woody gall disease,
- CVEV
How to Cite
Funding data
-
Horizon 2020
Grant numbers No. 734736 -
Regione Campania
Grant numbers URCOFI (DGR 690/2016, 6th December 2016 -
Regione Puglia
Grant numbers INNOCI DGR n. 903/ 2012 15th May 2012
Abstract
Citrus vein enation virus (CVEV) was described in Spain and then it has been reported in several citrus growing areas of Asia, America and Australia. Here, the occurrence of CVEV in Italy has been documented for the first time. The full genome sequence of a CVEV Italian isolate (14Q) was determined by high-throughput sequencing and the presence of the virus was confirmed by RT-PCR and graft-transmission to indicator plants, from which the virus was recovered six-months post-inoculation. Phylogenetic analysis based on the full-length genome of CVEV isolates from different countries showed that they are phylogenetically related to each other based on their geographic origin, rather than on their host and that the Italian isolate is more closely related to the Spanish isolate than to the other ones. A field survey revealed the presence of CVEV in some areas of Campania region (southern Italy), prevalently infecting lemon trees. In the frame of this survey, kumquat was identified for the first time as a host of CVEV. No symptoms were observed in the field so far. The infection of asymptomatic hosts and the transmission by aphid species present in Italy increase the risk that the virus could further spread.
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