Viruses infecting main ornamental plants: an overview

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.

Field assessment of a second generation backcross (BC1 × Passiflora edulis) of passion fruit for agronomic performance and resistance to CABMV

“…In our study, plants with DI ranging from 0.0% to 11.1% were considered resistant when evaluated in the field, and the progeny BC2.1, BC2.2, BC2.14, BC2.47 did not present symptoms induced by CABMV (DI = 0%) (Figure 5a,c). Some studies report that the systemic presence of the virus may or may not induce plant disease symptoms (Lima et al., 2011b; Mitrofanova et al., 2018). This finding is supported by the observation of Freitas et al.…”

Pospiviroides de importância para hortaliças e ornamentais: panorama dos aspectos fitopatológicos e dos riscos para os sistemas agrícolas brasileiros

“…Hospedeiras cultivadas, como jasmim-do-campo (Solanum jasminoides), por exemplo, podem atuar como fonte persistente de PSTVd para cultivos de tomateiro. Ornamentais perenes podem servir de reservatório para vírus e viroides, permitindo a circulação destes patógenos e a transmissão para outras culturas economicamente importantes (MITROFANOVA et al 2018). A ampla gama de hospedeiras de alguns pospiviroides como o CEVd, CSVd, HSVd e PSTVd, incluindo espécies cultivadas e da vegetação espontânea, facilita a manutenção desses patógenos no campo e, consequentemente, sua dispersão (GOBATTO et al 2019;HADIDI et al 2017).…”

A New Jasmine Virus C Isolate Identified by Nanopore Sequencing Is Associated to Yellow Mosaic Symptoms of Jasminum officinale in Italy

“…This technique allowed the discovery of new viruses infecting several hosts, including ornamental and cultivated plants, whether the infections were able to express symptoms or not, as well as the detection of already described viruses in new hosts [ 9 , 10 ]. The critical role and potential danger played by these virus-infected ornamental hosts as inoculum reservoir and/or alternate hosts, and the importance of timely and accurate pathogen detection and disease management, have been also posed [ 3 , 11 , 12 , 13 ]. An under-evaluated risk is that increased international trades of ornamental plants facilitate the introduction of new pathogens, which in turn may cause disease outbreaks through unaware transmission to new hosts or crops, endangering new ecological and agricultural areas previously free from the specific alien pathogen.…”