A Novel Parvovirus Associated with the Whitefly Bemisia tabaci

The whitefly Bemisia tabaci (Hemiptera: Aleyrodoidea) causes direct feeding damage to crop plants and transmits pathogenic plant viruses, thereby threatening global food security. Although whitefly-infecting RNA viruses are known and proposed as biocontrol agents, no insect DNA virus has been found...

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Vydáno v:Pathogens (Basel) Ročník 14; číslo 7; s. 714
Hlavní autoři: Gousi, Fani, Belabess, Zineb, Laboureau, Nathalie, Peterschmitt, Michel, Pooggin, Mikhail M.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Switzerland MDPI AG 19.07.2025
MDPI
Témata:
Aleyrodidae
Aleyrodoidea
ambisense
Amino acids
Animals
Bemisia tabaci
Biological control
Crop damage
Crop fields
Datasets
densovirus
Deoxyribonucleic acid
DNA
DNA biosynthesis
DNA polymerase
DNA replication
DNA sequencing
DNA viruses
DNA, Viral - genetics
Encapsidation
Endonuclease
Executives
Food security
Food supply
Fusion protein
Genetic diversity
Genetic variance
Genome, Viral
Genomes
Genomics
Hemiptera - virology
homotelomeric
Insect pests
Insects
Invertebrates
New genera
Nucleases
Nucleotide sequencing
Packaging
parvoviridae
Parvovirus - classification
Parvovirus - genetics
Parvovirus - isolation & purification
Parvoviruses
Phylogenetics
Phylogeny
Plant Diseases - virology
Plant viruses
Proteins
RNA
RNA polymerase
RNA viruses
Single-stranded DNA
Taxonomy
Telomerase
Viruses
whitefly
Morocco
Spain
endogenous viral elements
parvoviridae
Bemisia tabaci
episomal
whitefly
ambisense
homotelomeric
densovirus
neofunctionalization
ISSN:2076-0817, 2076-0817
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Shrnutí:The whitefly Bemisia tabaci (Hemiptera: Aleyrodoidea) causes direct feeding damage to crop plants and transmits pathogenic plant viruses, thereby threatening global food security. Although whitefly-infecting RNA viruses are known and proposed as biocontrol agents, no insect DNA virus has been found in any member of Aleyrodoidea. Using rolling circle amplification (RCA) of viral DNA from whiteflies collected from crop fields in Morocco, followed by Illumina sequencing of the RCA products, we found a novel insect single-stranded (ss) DNA parvovirus (family Parvoviridae) in addition to plant ssDNA geminiviruses transmitted by whiteflies. Based on its genome organization with inverted terminal repeats and evolutionarily conserved proteins mediating viral DNA replication (NS1/Rep) and encapsidation (VP), encoded on the forward and reverse strands, respectively, we named this virus Bemisia tabaci ambidensovirus (BtaDV) and classified it as a founding member of a new genus within the subfamily Densovirinae. This subfamily also contains three distinct genera of ambisense densoviruses of other hemipteran insects (Aphidoidea, Coccoidea, and Psylloidea). Furthermore, we provide evidence for the genetic variants of BtaDV circulating in whitefly populations and for its partial sequences integrated into the B. tabaci genome, with one integrant locus potentially expressing a fusion protein composed of viral Rep endonuclease and host DNA-binding domains. This suggests a long-term virus-host interaction and neofunctionalization of BtaDV-derived endogenous viral elements.
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SourceType-Scholarly Journals-1
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ISSN:2076-0817
2076-0817
DOI:10.3390/pathogens14070714