Abstract
Ornamental plants are cultivated for decorative and utility purposes in urban landscapes throughout the world. They are much valued for their aesthetic properties and constitute an important part of the global horticulture industry. Plant viruses and viroids of various taxonomic groups have a significant negative impact on ornamentals provoking a wide range of symptoms, reducing both decorative value and quality of propagated material and causing large economic damage. A significant growth of the ornamental plants market in recent years promotes the spread of viral diseases. Therefore, systematization of data on virus and viroid phytopathogens diversity in these cultures is an urgent research task. Among the most popular ornamentals are chrysanthemum, rose, clematis, canna, and lavender. More than fifty viruses and viroids from 17 different families (including two viroid families) have been identified in these crops to date. In the presented review, we described the variety of these pathogens and their effect on the above-mentioned ornamentals
Highlights
Ornamental plants are very popular and economically important worldwide
Mixed infections with two or three viruses of different taxonomic groups are common in canna (RAJAKARUNA et al, 2014; CHAUHAN et al 2015; KUMARI et al, 2016; ZAKUBANSKIY et al, 2017)
The most common disease of lavender and its hybrid form lavandin (Lavandula hybrida Rev.) is the yellow mosaic caused by Alfalfa mosaic virus (AMV, genus Alfamovirus, family Bromoviridae)
Summary
Ornamental plants are very popular and economically important worldwide. The international market of ornamentals is constantly expanding. It includes production of cut and potted flowers, cut foliage plants, as well as propagation material. Viruses and viroids can significantly reduce both decorative value and quality of propagated material of ornamentals. Due to the wide range of ornamental plant species and cultivars and their wide geographical distribution, the diversity of viruses that infect them is high. Perennial ornamental crops can be natural reservoirs for plant viruses, promoting circulation of viruses and their transmission to other economically important crops. Investigation on the diversity of viruses and viroids associated with ornamentals is very important for their effective detection and prevention of the further spread of infections. The most important virus and viroid pathogens of chrysanthemum, garden and essential oil rose, clematis, canna and lavender have been characterized briefly
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