Abstract
Tomato torrado virus (ToTV) induces severe systemic necrosis in Solanum lycopersicum. This work aimed at describing the genetic variability of necrosis-inducing ToTV-Wal’17 collected in 2017, derived from the ToTV-Wal’03 after long-term passages in plants. Sequence analyses of the ToTV-Wal’17 indicated twenty-eight single nucleotide substitutions in coding sequence of both RNAs, twelve of which resulted in amino acid changes in viral polyproteins. Moreover the sequencing data revealed that the 3’UTR of ToTV-Wal’17 RNA1 was 394 nts shorter in comparison to Wal’03. The performed sequence analyses revealed that 3’UTR of RNA1 of ToTV-Wal’17 is the most divergent across all previously described European isolates.
Highlights
Tomato torrado virus (ToTV) is a member of the Torradovirus genus in the Secoviridae family [1,2]
Tomato torrado virus has been identified in Spain [7], Hungary [8], Poland [6], Canary Islands [9], France [10], Panama [11], Italy [12], Australia [13], Colombia [14], and Morocco [15]
From 2009–2013, the ToTV was included on the EPPO Alert List due to its expansion and severity
Summary
Tomato torrado virus (ToTV) is a member of the Torradovirus genus in the Secoviridae family [1,2]. ToTV infects Solanum lycopersicum causing “torrado” disease, manifested by burn-like severe necrosis of stems, leaves, and fruits [3,4,5]. Tomato torrado virus has been identified in Spain [7], Hungary [8], Poland [6], Canary Islands [9], France [10], Panama [11], Italy [12], Australia [13], Colombia [14], and Morocco [15]. The ToTV was found to be infecting tomato crops in new locations, South Africa [16] and Serbia [17], indicating that the virus should still be considered as a serious threat to tomato. ToTV can be mechanically inoculated to, among others, S. lycopersicum or N. benthamiana [4,18], a well-known model for plant–pathogen interactions [19]
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