Abstract
ABSTRACT The mycovirus Fusarium culmorum phenuivirus 1 (FcPV1) infects the wheat pathogen Fusarium culmorum , a causal agent of Fusarium head blight (FHB). FHB remains a major threat to cereal cultivation, and the potential of biological control approaches, including the use of mycoviruses, has been suggested for its mitigation. In this study, we describe the biological characterisation of FcPV1, which is a single‐stranded, negative‐sense RNA mycovirus from the Phenuiviridae family. FcPV1 was detected in our previous study, and here we examine its impact on fungal growth and virulence by assessing the pathogenicity of infected F . culmorum on wheat under laboratory to semifield conditions. In laboratory experiments, the presence of FcPV1 resulted in no discernible phenotypic changes, but it was readily transmitted vertically to conidia and horizontally to Fusarium graminearum and other F . culmorum strains. In a greenhouse pot experiment with FHB‐susceptible and ‐resistant wheat, FcPV1 infection appeared to induce hypervirulence, while under semifield conditions, it seemed to result in hypovirulence. In the susceptible cultivar, FcPV1 infection decreased biomass‐adjusted nivalenol concentrations by approximately 40%, whereas deoxynivalenol increased by 28%. To our knowledge, this is the first study comparing mycovirus effects in laboratory, greenhouse and semifield environments. Our findings highlight the complexity of mycovirus–host interactions and the importance of environmental context, emphasising that potential biological control using mycoviruses should be assessed across varying complexities, including semifield and field conditions. This study challenges the notion that mycoviruses are typically cryptic, emphasising that their effects may only manifest under specific environmental conditions and measured parameters.
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Claims 7
Claim · model-written summary
FcPV1 caused no discernible laboratory phenotype in Fusarium culmorum.
- Taxon
- wheat
Triticum aestivume1 - Interactor
- Fusarium culmorum
.jpg?width=60)
Fusarium culmorumt0 - Outcome
- no discernible phenotypic changese0
- Setting
- laboratory experimentse0
Not reportedInteractor role
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In laboratory experiments, the presence of FcPV1 resulted in no discernible phenotypic changes”
t0“Fusarium culmorum”
e1“wheat pathogen Fusarium culmorum”
Claim · model-written summary
FcPV1 was transmitted vertically to conidia.
- Taxon
- wheatTriticum aestivume1
- Interactor
- Fusarium culmorumFusarium culmorumt0
- Outcome
- transmitted vertically to conidiae0
Not reportedInteractor role
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was readily transmitted vertically to conidia”
t0“Fusarium culmorum”
e1“wheat pathogen Fusarium culmorum”
Claim · model-written summary
FcPV1 was transmitted horizontally to Fusarium graminearum and other F. culmorum strains.
- Taxon
- wheatTriticum aestivume1
- Interactor
- Fusarium graminearum
_on_Corn_(Zea_mays)_at_Waimea%2C_Hawaii.jpg?width=60)
Fusarium graminearume0 - Outcome
- horizontally to Fusarium graminearum and other F . culmorum strainse0
Not reportedInteractor role
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_on_Corn_(Zea_mays)_at_Waimea%2C_Hawaii.jpg?width=500)
Verbatim
e0“horizontally to Fusarium graminearum and other F . culmorum strains”
t0“Fusarium culmorum”
e1“wheat pathogen Fusarium culmorum”
Claim · model-written summary
FcPV1 infection appeared to increase pathogen virulence in greenhouse wheat.
- Taxon
- wheatTriticum aestivume0
- Interactor
- Fusarium culmorumFusarium culmorumt0
- Outcome
- hypervirulencee0
- Setting
- greenhouse pot experimente0
Not reportedInteractor role
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a greenhouse pot experiment with FHB‐susceptible and ‐resistant wheat, FcPV1 infection appeared to induce hypervirulence”
t0“Fusarium culmorum”
e1“wheat pathogen Fusarium culmorum”
Claim · model-written summary
FcPV1 infection seemed to reduce pathogen virulence under semifield conditions.
- Taxon
- wheatTriticum aestivume1
- Interactor
- Fusarium culmorumFusarium culmorumt0
- Outcome
- hypovirulencee0
- Setting
- semifield conditionse0
Not reportedInteractor role
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under semifield conditions, it seemed to result in hypovirulence”
t0“Fusarium culmorum”
e1“wheat pathogen Fusarium culmorum”
Claim · model-written summary
FcPV1 infection lowered biomass-adjusted nivalenol concentration by about 40% in susceptible wheat.
- Taxon
- wheatTriticum aestivume1
- Material
- susceptible cultivare0
- Treatment
- FcPV1 infectione0
- Outcome
- biomass‐adjusted nivalenol concentrationse0
- Direction
- decreasede0
- Value
- approximately 40%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the susceptible cultivar, FcPV1 infection decreased biomass‐adjusted nivalenol concentrations by approximately 40%”
t0“Fusarium culmorum”
e1“wheat pathogen Fusarium culmorum”
Claim · model-written summary
FcPV1 infection raised deoxynivalenol by 28% in susceptible wheat.
- Taxon
- wheatTriticum aestivume1
- Outcome
- deoxynivalenole0
- Direction
- increasede0
- Value
- 28%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas deoxynivalenol increased by 28%”
t0“Fusarium culmorum”
e1“wheat pathogen Fusarium culmorum”
The same questions in other papers
Fusarium culmorum · growth · Triticum aestivum (wheat)Results differ
1 paper in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
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See all 10 papers →infection · growth · Triticum aestivum (wheat)Positive and negative results
12 papers in the same direction as this paper · 46 in the opposite direction
- negative
- negative
- negative
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See all 59 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.