Abstract
Resistance to cucumber mosaic virus (CMV) strain LS in melon is controlled by the gene cmv1, which restricts phloem entry. In nature, CMV is commonly found in mixed infections, particularly with potyviruses, where a synergistic effect is frequently produced. We have explored the possibility that this synergism could help CMV-LS to overcome cmv1-mediated resistance. We demonstrate that during mixed infection with a potyvirus, CMV-LS is able to overcome cmv1-controlled resistance and develop a systemic infection and that this ability does not depend on an increased accumulation of CMV-LS in mechanically inoculated cotyledons. Likewise, during a mixed infection initiated by aphids, the natural vector of both cucumoviruses and potyviruses that can very efficiently inoculate plants with a low number of virions, CMV-LS also overcomes cmv1-controlled resistance. This indicates that in the presence of a potyvirus, even a very low amount of inoculum, can be sufficient to surpass the resistance and initiate the infection. These results indicate that there is an important risk for this resistance to be broken in nature as a consequence of mixed infections, and therefore, its deployment in elite cultivars would not be enough to ensure a long-lasting resistance.
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Claims 4
Claim · model-written summary
During potyvirus mixed infection CMV-LS overcame cmv1 resistance and became systemic.
- Taxon
- Melon
.jpg?width=60)
Cucumis melot0 - Treatment
- mixed infection with a potyviruse0
- Interactor
- CMV-LSe0pathogen
- Gene
- cmv1e0
- Outcome
- CMV-LS is able to overcome cmv1-controlled resistance and develop a systemic infectione0
PotyvirusNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“during mixed infection with a potyvirus, CMV-LS is able to overcome cmv1-controlled resistance and develop a systemic infection”
t0“Melon”
Claim · model-written summary
Resistance breaking did not depend on greater CMV-LS accumulation in inoculated cotyledons.
- Taxon
- MelonCucumis melot0
- Organ / stage
- mechanically inoculated cotyledonse0
- Interactor
- CMV-LSe0pathogen
- Outcome
- increased accumulation of CMV-LSe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this ability does not depend on an increased accumulation of CMV-LS in mechanically inoculated cotyledons.”
t0“Melon”
Claim · model-written summary
CMV-LS overcame cmv1 resistance during aphid initiated mixed infection.
- Taxon
- MelonCucumis melot0
- Treatment
- mixed infection initiated by aphidse0
- Interactor
- CMV-LSe0pathogen
- Gene
- cmv1e0
- Outcome
- CMV-LS also overcomes cmv1-controlled resistancee0
- Qualifier
- aphidse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during a mixed infection initiated by aphids, the natural vector of both cucumoviruses and potyviruses that can very efficiently inoculate plants with a low number of virions, CMV-LS also overcomes cmv1-controlled resistance.”
t0“Melon”
Claim · model-written summary
Authors conclude that potyvirus mixed infections threaten durability of elite cultivar resistance.
- Taxon
- MelonCucumis melot0
- Outcome
- deployment in elite cultivars would not be enough to ensure a long-lasting resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its deployment in elite cultivars would not be enough to ensure a long-lasting resistance.”
t0“Melon”
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infection · disease · Cucumis melo (muskmelon)Results agree
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