A pathogenic picorna-like virus from the endoparasitoid wasp, Pteromalus puparum: initial discovery and partial...

Area of Science:

• * Virology
• * Entomology
• * Molecular Biology

Background:

• * Endoparasitic wasps, such as Pteromalus puparum, play a crucial role in biological pest control.
• * Viral infections can impact insect populations and their ecological functions.
• * Understanding insect viruses is vital for integrated pest management strategies.

Purpose of the Study:

• * To identify and characterize a novel virus found in the venom apparatus of Pteromalus puparum.
• * To investigate the morphological and genomic features of the newly discovered virus.
• * To determine the potential pathogenicity and evolutionary relationships of the virus.

Main Methods:

• * Electron microscopy was used to visualize the virus particles.
• * Partial genomic sequencing was performed to analyze viral genetic material.
• * Phylogenetic analysis was conducted to determine evolutionary relationships with known viruses.

Main Results:

• * A novel small RNA-containing virus, designated PpSRV, was identified in Pteromalus puparum venom apparatus.
• * PpSRV exhibits morphological characteristics of picorna-like viruses and caused tissue damage.
• * Genomic analysis revealed similarities to dicistroviruses, including an IRES element and structural proteins, placing it in the Cripavirus genus.

Conclusions:

• * PpSRV is a novel dicistrovirus identified in the parasitic wasp Pteromalus puparum.
• * The virus appears to be pathogenic to its host, causing damage to the venom apparatus.
• * Its phylogenetic proximity to Black queen cell virus suggests potential cross-species interactions or shared ancestry.