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A New Ilarvirus Found in French Hydrangea
Giuseppe Parrella1, Elisa Troiano1
1Institute for Sustainable Plant Protection of the National Research Council (IPSP-CNR), Piazzale Enrico Fermi 1, 80055 Portici, NA, Italy.
Plants (Basel, Switzerland)
|April 12, 2022
Summary
A new virus causing vein banding and ring spots in French hydrangeas was identified. Phylogenetic analysis confirmed it as a new ilarvirus member, named hydrangea vein banding virus (HdVBV).
Area of Science:
- Plant Virology
- Molecular Phylogenetics
- Plant Pathology
Background:
- French hydrangea plants can be affected by viral diseases.
- Identifying and characterizing novel plant viruses is crucial for disease management.
Purpose of the Study:
- To identify and characterize a previously unknown virus infecting French hydrangeas.
- To determine the phylogenetic relationships and taxonomic position of the new virus.
Main Methods:
- Mechanical transmission to herbaceous hosts to assess symptoms.
- Genome sequencing and analysis of RNA components.
- Phylogenetic analysis of predicted viral proteins.
- Serological tests using homologous antiserum.
Main Results:
- A new virus, hydrangea vein banding virus (HdVBV), was identified in French hydrangeas.
- The virus genome consists of three RNA segments and exhibits characteristics of ilarviruses.
- Phylogenetic analysis places HdVBV within subgroup 2 of the genus *Ilarvirus*.
- A specific antiserum was developed for HdVBV detection without cross-reactivity with related viruses.
Conclusions:
- The biological, phylogenetic, and serological data support the classification of HdVBV as a new species within the genus *Ilarvirus*.
- HdVBV represents a novel pathogen affecting ornamental plants, necessitating further study for its impact and control.
