Abstract
Fusarium head blight (FHB) caused by Fusarium graminearum is one of the most destructive fungal diseases of wheat worldwide. The pathogen infects the spike at flowering time and causes severe yield losses, deterioration of grain quality, and accumulation of mycotoxins. The understanding of the precise means of pathogen entry and colonization of floral tissue is crucial to providing effective protection against FHB. Polygalacturonase (PG) inhibiting proteins (PGIPs) are cell-wall proteins that inhibit the activity of PGs, a class of pectin-depolymerizing enzymes secreted by microbial pathogens, including Fusarium spp. The constitutive expression of a bean PGIP (PvPGIP2) limits FHB symptoms and reduces mycotoxin accumulation in wheat grain. To better understand which spike tissues play major roles in limiting F. graminearum infection, we explored the use of PvPGIP2 to defend specific spike tissues. We show here that the simultaneous expression of PvPGIP2 in lemma, palea, rachis, and anthers reduced FHB symptoms caused by F. graminearum compared with symptoms in infected nontransgenic plants. However, the expression of PvPGIP2 only in the endosperm did not affect FHB symptom development, indicating that once the pathogen has reached the endosperm, inhibition of the pathogen's PG activity is not effective in preventing its further spread.
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Claims 3
Claim · model-written summary
Simultaneous PvPGIP2 expression in lemma, palea, rachis and anthers of wheat reduced F. graminearum FHB symptoms compared with infected nontransgenic plants.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- lemma, palea, rachis, and antherse1
- Treatment
- simultaneous expression of PvPGIP2e1
- Interactor
- F. graminearum
_on_Corn_(Zea_mays)_at_Waimea%2C_Hawaii.jpg?width=60)
Fusarium graminearume1pathogen - Gene
- PvPGIP2e1
- Outcome
- FHB symptomse1
- Direction
- reducede1
- Comparator
- infected nontransgenic plantse1
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
t0“in Wheat”
e1“We show here that the simultaneous expression of PvPGIP2 in lemma, palea, rachis, and anthers reduced FHB symptoms caused by F. graminearum compared with symptoms in infected nontransgenic plants”
Claim · model-written summary
PvPGIP2 expression only in the endosperm did not affect FHB symptom development in wheat.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- endosperme2
- Treatment
- expression of PvPGIP2 only in the endosperme2
- Interactor
- F. graminearumFusarium graminearume1pathogen
- Gene
- PvPGIP2e2
- Outcome
- FHB symptom developmente2
- Direction
- did not affecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Wheat”
e1“We show here that the simultaneous expression of PvPGIP2 in lemma, palea, rachis, and anthers reduced FHB symptoms caused by F. graminearum compared with symptoms in infected nontransgenic plants”
e2“However, the expression of PvPGIP2 only in the endosperm did not affect FHB symptom development, indicating that once the pathogen has reached the endosperm, inhibition of the pathogen's PG activity is not effective in preventing its further spread”
Claim · model-written summary
Once F. graminearum reached the endosperm, inhibiting its PG activity was not effective in preventing further spread in wheat.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- endosperme2
- Interactor
- F. graminearumFusarium graminearume1pathogen
- Outcome
- further spreade2
- Qualifier
- inhibition of the pathogen's PG activity is not effectivee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Wheat”
e1“We show here that the simultaneous expression of PvPGIP2 in lemma, palea, rachis, and anthers reduced FHB symptoms caused by F. graminearum compared with symptoms in infected nontransgenic plants”
e2“However, the expression of PvPGIP2 only in the endosperm did not affect FHB symptom development, indicating that once the pathogen has reached the endosperm, inhibition of the pathogen's PG activity is not effective in preventing its further spread”
The same questions in other papers
transgenic · Fusarium graminearum · Triticum aestivum (wheat)Positive and negative results
2 in the opposite direction
- positive
- positive
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.