Speakers - AFHWC2025

Abstract

Roses are one of the most popular ornamental plants worldwide, with Japan ranking as one of the top producers of cut roses. However, viral diseases are a major problem, resulting to reduced flower quality, weakened plant vigor, and economic losses in the horticulture industry. Among the most common viral diseases affecting roses include Rose Mosaic Disease (RMD), induced by a group of viruses, including Prunus necrotic ringspot virus (PNRSV), Rose cryptic virus (RCV), Rose yellow vein virus (RYVV), and Rose spring dwarf-associated virus (RSDaV), among others.

Nevertheless, there is limited information on the distribution of, severity and effects of these viruses on rose production in Japan. This study aims to fill this gap by comparing the incidence of viral diseases in roses in different rose gardens in Japan and determining their biological significance.

To achieve this, we conducted the following methods:

1. A systematic sampling and virus detection from roses grown in major rose gardens across Japan.
2. Molecular identification and phylogenetic analysis for the identification of viral diversity and relationships.
3. Re-infection test to confirm the pathogenicity of the isolated viruses and their effects on rose plants.

The research has identified several viral pathogens, some of which have unique genetic variations. Furthermore, the results of the re-infection test provide valuable importance on the biological effects of these viruses and support the hypothesis that they are involved in plant deterioration and yield reduction.

This research not only helps to increase the knowledge of virology in Japan but also stresses the importance of developing proper disease control measures in order to maintain the rose production in the country. The results will be beneficial in guiding future research and developing practical approaches to produce virus-free roses.