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A novel strain of the Begomovirus Tomato leaf curl Sudan virus infecting Datura stramonium in Sudan.

Mohammed, H. S. ; Siddig, M. A. E. ; Hussein, A. A. E. ; Navas-Castillo, J. ; Fiallo-Olivé, E.

Plant Disease 2018 Vol 102 No. 9 pp. 1863-1864;

Abstract

Devil's trumpet (Datura stramonium) plants were frequently observed showing yellowing and leaf curl symptoms in Khartoum State (Sudan) in the last few years. Leaf samples from 14 symptomatic plants were collected in Ajaily (one in 2016 and seven in 2017) and Soba Al-Hilla (six in 2017) and dried using silica gel until analysis. Based on the results of PCR assays, rolling-circle amplification and Blast analysis of the nucleotide sequence, the causal agent was identified as an isolate of tomato leaf curl Sudan virus (ToLCSDV). In accordance with the current taxonomic criteria for begomovirus species (cutoff value <91%) and strain (cutoff value <94%) demarcation, the begomovirus isolate represents a novel strain of ToLCSDV, named as strain Datura. This is thought to be the first record of a species of the genus Datura as a natural host of ToLCSDV.