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Functional Transcomplementation between Wheat Dwarf Virus Strains in Wheat and Barley.

Isabelle Abt1,2, Marlène Souquet1, Gersende Angot1

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Summary
This summary is machine-generated.

Wheat dwarf virus (WDV) strains show specific host preferences for wheat or barley. However, co-infection enables each strain to infect the non-preferred host, revealing complex WDV-host interactions.

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Area of Science:

  • Plant virology
  • Entomology
  • Molecular biology

Background:

  • Wheat dwarf virus (WDV) is transmitted by the leafhopper *Psammotettix alienus*.
  • WDV isolates exhibit preferential infection of either wheat or barley, defining distinct wheat and barley strains.
  • Previous studies presented conflicting data on the ability of each WDV strain to infect its non-preferred host.

Purpose of the Study:

  • To investigate the transmission efficiency of WDV strains by *P. alienus*.
  • To determine the host range of WDV wheat and barley strains, individually and in mixed infections.
  • To elucidate the interaction mechanisms between WDV strains and their hosts, wheat and barley.

Main Methods:

  • Transmission experiments using barcoded *P. alienus* (males, females, larvae).
  • Single and sequential acquisition of WDV strains.
  • Inoculation of wheat and barley plants with WDV strains.

Main Results:

  • WDV strains were transmitted with similar efficiencies by all life stages of *P. alienus*.
  • WDV wheat and barley strains did not infect barley and wheat plants, respectively, in single infections.
  • A functional transcomplementation between WDV wheat and barley strains enabled mixed infection of both barley and wheat.

Conclusions:

  • WDV transmission efficiency is consistent across *P. alienus* life stages.
  • Individual WDV strains exhibit strict host specificity.
  • Co-infection with both WDV strains allows for a broadened host range through transcomplementation, impacting WDV host range analysis.