A New Ilarvirus Found in French Hydrangea

In this study, a new virus was identified in French hydrangea plants, exhibiting chlorotic vein banding and necrotic ring spots on older leaves. The virus was mechanically transmitted to herbaceous hosts, in which it induced local and systemic or only local symptoms. The genome of the new virus was...

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Main Authors: Giuseppe Parrella, Elisa Troiano
Format: Article
Language:English
Published: MDPI AG 2022-03-01
Series:Plants
Subjects:
Online Access:https://www.mdpi.com/2223-7747/11/7/944
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author Giuseppe Parrella
Elisa Troiano
author_facet Giuseppe Parrella
Elisa Troiano
author_sort Giuseppe Parrella
collection DOAJ
description In this study, a new virus was identified in French hydrangea plants, exhibiting chlorotic vein banding and necrotic ring spots on older leaves. The virus was mechanically transmitted to herbaceous hosts, in which it induced local and systemic or only local symptoms. The genome of the new virus was characterized and consisted of three RNA sequences that were 3422 (RNA 1), 2905 (RNA 2) and 2299 (RNA 3) nucleotides long, with five predicted open reading frames; RNA2 was bicistronic and contained conserved domains and motifs typical of ilarviruses. The phylogenetic analysis of the predicted proteins—p1, p2a, p3a and p3b—revealed its close relationship to recognized members of subgroup 2 within the genus <i>Ilarvirus</i>. Homologous antiserum was effective in the detection of the virus in plant extracts and no cross reactions with two other distinct members of subgroup 2 were observed. Overall, the biological features, phylogenetic relationships and serological data suggest that this virus is a new member of the genus, for which we propose the name hydrangea vein banding virus (HdVBV).
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spelling doaj.art-a9c7ec2c91db47a1bbb6a0d2aaa148fd2023-11-30T23:51:13ZengMDPI AGPlants2223-77472022-03-0111794410.3390/plants11070944A New Ilarvirus Found in French HydrangeaGiuseppe Parrella0Elisa Troiano1Institute for Sustainable Plant Protection of the National Research Council (IPSP-CNR), Piazzale Enrico Fermi 1, 80055 Portici, NA, ItalyInstitute for Sustainable Plant Protection of the National Research Council (IPSP-CNR), Piazzale Enrico Fermi 1, 80055 Portici, NA, ItalyIn this study, a new virus was identified in French hydrangea plants, exhibiting chlorotic vein banding and necrotic ring spots on older leaves. The virus was mechanically transmitted to herbaceous hosts, in which it induced local and systemic or only local symptoms. The genome of the new virus was characterized and consisted of three RNA sequences that were 3422 (RNA 1), 2905 (RNA 2) and 2299 (RNA 3) nucleotides long, with five predicted open reading frames; RNA2 was bicistronic and contained conserved domains and motifs typical of ilarviruses. The phylogenetic analysis of the predicted proteins—p1, p2a, p3a and p3b—revealed its close relationship to recognized members of subgroup 2 within the genus <i>Ilarvirus</i>. Homologous antiserum was effective in the detection of the virus in plant extracts and no cross reactions with two other distinct members of subgroup 2 were observed. Overall, the biological features, phylogenetic relationships and serological data suggest that this virus is a new member of the genus, for which we propose the name hydrangea vein banding virus (HdVBV).https://www.mdpi.com/2223-7747/11/7/944Ilarvirusplant RNA virusvirus detection<i>Hydrangea macrophylla</i>subgroup 2
spellingShingle Giuseppe Parrella
Elisa Troiano
A New Ilarvirus Found in French Hydrangea
Plants
Ilarvirus
plant RNA virus
virus detection
<i>Hydrangea macrophylla</i>
subgroup 2
title A New Ilarvirus Found in French Hydrangea
title_full A New Ilarvirus Found in French Hydrangea
title_fullStr A New Ilarvirus Found in French Hydrangea
title_full_unstemmed A New Ilarvirus Found in French Hydrangea
title_short A New Ilarvirus Found in French Hydrangea
title_sort new ilarvirus found in french hydrangea
topic Ilarvirus
plant RNA virus
virus detection
<i>Hydrangea macrophylla</i>
subgroup 2
url https://www.mdpi.com/2223-7747/11/7/944
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