Abstract
Abstract: A list of plant species, in alphabetical order by their scientific name, and the viruses found naturally infecting them in Brazilian territory, with some comments, was prepared . The production of such a list was based on a yearly catalog of publications on plant viruses collected by the author, from 1926 to 2018. Listed species of viruses were those recognized by the International Committee on Taxonomy of Viruses (ICTV), but also those characterized and still waiting official recognition, were included. Several cases of putative viral diseases were listed for historical reasons expecting to raise interest for their clarification. This list includes 345 plants species belonging to 74 families naturally infected by plant viruses in Brazil. Fabaceae and Asteraceae had most virus-infected species, respectively 49 and 36. Until 2018, a total of 213 plant virus and 6 viroid species belonging to 57 genera and 22 families and 6 orders, officially recognized by ICTV, were found naturally infecting these plants. Begomovirus and Potyvirus genera have most representatives, with 45 and 42 species, respectively. There are 59 characterized plant viruses, up to species level, described in Brazil waiting for the inclusion in the ICTV Master Species List. One hundred and thirteen viruses were identified up to genus level but still uncharacterized, while four putative isometric viruses and eleven presumptive viral diseases (“unidentified”) are included in the list. A reverse catalog, listing viruses and the plant species in which they were found is also included.
Highlights
The concept that viruses are part of the bioma is still a controversial subject
From 1926 to 2018, 345 plants species belonging to 74 families could be listed as naturally infected by plant viruses and viroids in Brazil
There are a total of 213 plant virus and 6 viroid species, belonging to 57 genera, 22 families and 6 orders, officially recognized by International Committee on Taxonomy of Viruses (ICTV) and included in the ICTV’s Master List of 2018B, found naturally infecting these plants in Brazilian territory
Summary
The concept that viruses are part of the bioma is still a controversial subject. Their chemical composition is akin of the cellular organisms. They have DNA or RNA as their genome, proteins (protective, enzymes) and lipid and glycid (in membrane bounded viruses). Recent works, using generation sequencing (NGS) or high-throughput sequencing (HTS) technologies (Reuter et al, 2015), discovered a huge number of viruslike sequences in several environments (Walker et al, 2019) Their proposition to incorporate them in the present official taxonomic system seems unreal as discussed by van Regenmortel (2016), who mentions that “the phenotypic and biological properties of members of new species taxa proposed on the basis of metagenomic data must be known before it becomes feasible to try to incorporate such hypothetical species in the current official system of virus classification”
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